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2007 Vol. 29, No. 5
Display Method:
2007, 29(5): 1017-1022.
doi: 10.3724/SP.J.1146.2005.01350
Abstract:
Multiple cue fusion based tracking is one of the most active research in tracking literature. In this paper, a novel adaptive fusion strategy is proposed for multiple cue fusion, base on two common used fusion rules: product rule and weighted sum rul...
Multiple cue fusion based tracking is one of the most active research in tracking literature. In this paper, a novel adaptive fusion strategy is proposed for multiple cue fusion, base on two common used fusion rules: product rule and weighted sum rul...
2007, 29(5): 1023-1026.
doi: 10.3724/SP.J.1146.2006.00165
Abstract:
In this paper, a novel method is proposed to determine the similarity between shots. Firstly, a shot is treated as an ensemble that consists of a sequence of video frames. Shot similarity can be measured by ensemble similarity. Secondly, the original...
In this paper, a novel method is proposed to determine the similarity between shots. Firstly, a shot is treated as an ensemble that consists of a sequence of video frames. Shot similarity can be measured by ensemble similarity. Secondly, the original...
2007, 29(5): 1027-1030.
doi: 10.3724/SP.J.1146.2005.01118
Abstract:
A new self-adaptive tracks correlation algorithm is proposed based on the wavelet frame condition and multi-resolution transform. The target track sequences can be decompounded to the whole trend and the detailed character of the tracks to solve trac...
A new self-adaptive tracks correlation algorithm is proposed based on the wavelet frame condition and multi-resolution transform. The target track sequences can be decompounded to the whole trend and the detailed character of the tracks to solve trac...
2007, 29(5): 1031-1034.
doi: 10.3724/SP.J.1146.2005.01228
Abstract:
Radial Basis Function-Partial Least Square regression ( RBF-PLS) approach is a rapid and efficient method in constructing Radial Basis Function Network (RBFN), and it has put forward a solution to the problem about the choice of the number and the ce...
Radial Basis Function-Partial Least Square regression ( RBF-PLS) approach is a rapid and efficient method in constructing Radial Basis Function Network (RBFN), and it has put forward a solution to the problem about the choice of the number and the ce...
2007, 29(5): 1035-1037.
doi: 10.3724/SP.J.1146.2005.01347
Abstract:
The relation of variational image decomposition and wavelet soft threshold was discovered recently by Daubechies and Teschke. A major issue is that thresholded coefficients entail oversmoothing of edges, coefficients set to zero yield Gibbs oscillati...
The relation of variational image decomposition and wavelet soft threshold was discovered recently by Daubechies and Teschke. A major issue is that thresholded coefficients entail oversmoothing of edges, coefficients set to zero yield Gibbs oscillati...
2007, 29(5): 1038-1040.
doi: 10.3724/SP.J.1146.2005.01549
Abstract:
As a new tool, the wavelet transform has been used successfully in signal denoising. In this paper, the MAP estimate of double Haar wavelet transform coefficients is developed. Also, its application to image denoising is discussed. Examples show that...
As a new tool, the wavelet transform has been used successfully in signal denoising. In this paper, the MAP estimate of double Haar wavelet transform coefficients is developed. Also, its application to image denoising is discussed. Examples show that...
2007, 29(5): 1041-1044.
doi: 10.3724/SP.J.1146.2005.01014
Abstract:
A new method of DOA estimation is presented based on higher-order cumulant. Using the aperture extension property of higher-order cumulant , this method calculates the coordinate and steer vector of virtual sensors from the coordinate and steer vecto...
A new method of DOA estimation is presented based on higher-order cumulant. Using the aperture extension property of higher-order cumulant , this method calculates the coordinate and steer vector of virtual sensors from the coordinate and steer vecto...
2007, 29(5): 1045-1049.
doi: 10.3724/SP.J.1146.2005.01302
Abstract:
A new method of two-dimensional DOA (Direction of Arrival) estimation for low frequency sound source with the non-typical vector acoustic intensity array of small size is proposed. This array consists of 4 sensors on the 3 orthogonal axes, so as to m...
A new method of two-dimensional DOA (Direction of Arrival) estimation for low frequency sound source with the non-typical vector acoustic intensity array of small size is proposed. This array consists of 4 sensors on the 3 orthogonal axes, so as to m...
2007, 29(5): 1050-1053.
doi: 10.3724/SP.J.1146.2005.01270
Abstract:
A new type of genetic algorithm combined the simulated annealing with the advantage of guaranteeing convergence and deciding convergence easily is used for optimization the performance in estimation direction-of-arrival of linear array. In the proces...
A new type of genetic algorithm combined the simulated annealing with the advantage of guaranteeing convergence and deciding convergence easily is used for optimization the performance in estimation direction-of-arrival of linear array. In the proces...
2007, 29(5): 1054-1057.
doi: 10.3724/SP.J.1146.2005.01253
Abstract:
Unknown signals are always be treated as outputs of stationary information sources which are easy to be dealt with. So, it is possible to compute multi-fractal spectrum of the signals, which are compared with theoretical results to verify whether the...
Unknown signals are always be treated as outputs of stationary information sources which are easy to be dealt with. So, it is possible to compute multi-fractal spectrum of the signals, which are compared with theoretical results to verify whether the...
2007, 29(5): 1058-1060.
doi: 10.3724/SP.J.1146.2005.01444
Abstract:
A new algorithm is proposed for Time Difference of Arrival(TDOA) estimation from a train of coherent pulses in additive Gaussian noise, named it as frequency compensation TDOA estimation. It is shown to be a algorithm with small estimation error, sma...
A new algorithm is proposed for Time Difference of Arrival(TDOA) estimation from a train of coherent pulses in additive Gaussian noise, named it as frequency compensation TDOA estimation. It is shown to be a algorithm with small estimation error, sma...
2007, 29(5): 1061-1064.
doi: 10.3724/SP.J.1146.2005.01360
Abstract:
Because of different working ways between BiSAR and SAR, this paper analyzes the feasibility of rebound jamming against BiSAR and the effective of the jamming is proved. The model of rebound jamming against BiSAR is given. The jamming principle and e...
Because of different working ways between BiSAR and SAR, this paper analyzes the feasibility of rebound jamming against BiSAR and the effective of the jamming is proved. The model of rebound jamming against BiSAR is given. The jamming principle and e...
2007, 29(5): 1065-1068.
doi: 10.3724/SP.J.1146.2005.01283
Abstract:
In the high resolution SAR, the effect of motion error at the azimuth direction is more severe. Though the traditional Phase Gradient Autofocus(PGA) algorithm can be used to estimate the motion error, the iterative phase correction has to be done. Th...
In the high resolution SAR, the effect of motion error at the azimuth direction is more severe. Though the traditional Phase Gradient Autofocus(PGA) algorithm can be used to estimate the motion error, the iterative phase correction has to be done. Th...
2007, 29(5): 1069-1072.
doi: 10.3724/SP.J.1146.2005.01359
Abstract:
A novel Markow Random Field(MRF)-based segmentation method for SAR images is proposed. The method involves the intensity differences and the distances between pixels based on the traditional MRF potential function. It utilizes more spacial informatio...
A novel Markow Random Field(MRF)-based segmentation method for SAR images is proposed. The method involves the intensity differences and the distances between pixels based on the traditional MRF potential function. It utilizes more spacial informatio...
2007, 29(5): 1073-1076.
doi: 10.3724/SP.J.1146.2005.01406
Abstract:
ATI-SAR system requires that the phase characteristic of the two channels is precisely matched. This paper analyzes the phase error of ATI-SAR system, gives the mathematic model, proposes a simple phase calibration method for ATI-SAR system based on ...
ATI-SAR system requires that the phase characteristic of the two channels is precisely matched. This paper analyzes the phase error of ATI-SAR system, gives the mathematic model, proposes a simple phase calibration method for ATI-SAR system based on ...
2007, 29(5): 1077-1082.
doi: 10.3724/SP.J.1146.2005.01210
Abstract:
To achieve wide-swath and full azimuth resolution in space-borne Synthetic Aperture Radar (SAR), the satellite can take low Pulse Repetition Frequency (PRF) and small aperture in azimuth. Then azimuth ambiguities is inevitable. The constellation of s...
To achieve wide-swath and full azimuth resolution in space-borne Synthetic Aperture Radar (SAR), the satellite can take low Pulse Repetition Frequency (PRF) and small aperture in azimuth. Then azimuth ambiguities is inevitable. The constellation of s...
2007, 29(5): 1083-1086.
doi: 10.3724/SP.J.1146.2005.01981
Abstract:
This paper studies the performances of GPS signals as the illuminator of bistatic passive radar. The radar system structure and signal model are firstly developed, then the detection range and signal ambiguity are analyzed, and finally computer simul...
This paper studies the performances of GPS signals as the illuminator of bistatic passive radar. The radar system structure and signal model are firstly developed, then the detection range and signal ambiguity are analyzed, and finally computer simul...
2007, 29(5): 1087-1091.
doi: 10.3724/SP.J.1146.2005.01211
Abstract:
At high grazing angles, the sea clutter background has a strong impact on 3-D imaging. A method for Radon transform based sea clutter suppression is given in this paper. ISAR technique is used to get two-dimension image of the target firstly. Then an...
At high grazing angles, the sea clutter background has a strong impact on 3-D imaging. A method for Radon transform based sea clutter suppression is given in this paper. ISAR technique is used to get two-dimension image of the target firstly. Then an...
2007, 29(5): 1092-1095.
doi: 10.3724/SP.J.1146.2005.01394
Abstract:
A new method based on frequency domain masking and fractional correlation is presented for Anti Radio Missile (ARM) detection. The method adopts the frequency domain masking technique to mask the peak fields of the radar echos Fourier transform data,...
A new method based on frequency domain masking and fractional correlation is presented for Anti Radio Missile (ARM) detection. The method adopts the frequency domain masking technique to mask the peak fields of the radar echos Fourier transform data,...
2007, 29(5): 1096-1100.
doi: 10.3724/SP.J.1146.2005.01002
Abstract:
A method based on fractional spectral subtraction for speech enhancement (FSS) is proposed. It applies FRFT (FRactional Fourier Transform) to noisy speech, the estimated fractional noise spectrum is then subtracted from the derived fractional speech-...
A method based on fractional spectral subtraction for speech enhancement (FSS) is proposed. It applies FRFT (FRactional Fourier Transform) to noisy speech, the estimated fractional noise spectrum is then subtracted from the derived fractional speech-...
2007, 29(5): 1101-1105.
doi: 10.3724/SP.J.1146.2005.00829
Abstract:
This paper proposes a novel joint iterative channel estimation and symbol detection algorithm based on MMSE criterion for MIMO-OFDM systems. The performance of the joint iterative algorithm mainly depends on initial channel estimator and iterative al...
This paper proposes a novel joint iterative channel estimation and symbol detection algorithm based on MMSE criterion for MIMO-OFDM systems. The performance of the joint iterative algorithm mainly depends on initial channel estimator and iterative al...
2007, 29(5): 1106-1109.
doi: 10.3724/SP.J.1146.2005.01251
Abstract:
An 800/920/1200bps modified speech coder based on the Multi-Band Excitation (MBE) speech model is presented. The two stage discrete cosine transformation coding scheme has been used to quantize the spectral magnitude parameters changing frame-by-fram...
An 800/920/1200bps modified speech coder based on the Multi-Band Excitation (MBE) speech model is presented. The two stage discrete cosine transformation coding scheme has been used to quantize the spectral magnitude parameters changing frame-by-fram...
2007, 29(5): 1110-1114.
doi: 10.3724/SP.J.1146.2005.01377
Abstract:
A new polarization smoothing algorithm is proposed for the 2-D direction finding of coherent cyclostationary signals. By sufficiently utilizing the cyclostationarity and polarization diversity, the proposed method increases the number of coherent sou...
A new polarization smoothing algorithm is proposed for the 2-D direction finding of coherent cyclostationary signals. By sufficiently utilizing the cyclostationarity and polarization diversity, the proposed method increases the number of coherent sou...
2007, 29(5): 1115-1118.
doi: 10.3724/SP.J.1146.2005.01303
Abstract:
There are various structures of good TCM codes. And based on the trellis map, the most possible structure of good TCM codes is analyzed. From the results, a construction algorithm is then designed. Since the searching space is greatly reduced, this m...
There are various structures of good TCM codes. And based on the trellis map, the most possible structure of good TCM codes is analyzed. From the results, a construction algorithm is then designed. Since the searching space is greatly reduced, this m...
2007, 29(5): 1119-1123.
doi: 10.3724/SP.J.1146.2005.01214
Abstract:
This paper investigates a serial concatenation of Low-Density Parity-Check (LDPC) codes with Minimum Shift Keying (MSK) when the receiver employs iterative decoding and demodulation. First, the RCPE and NRCPE modes of the MSK modulator are described,...
This paper investigates a serial concatenation of Low-Density Parity-Check (LDPC) codes with Minimum Shift Keying (MSK) when the receiver employs iterative decoding and demodulation. First, the RCPE and NRCPE modes of the MSK modulator are described,...
2007, 29(5): 1124-1126.
doi: 10.3724/SP.J.1146.2005.01254
Abstract:
In the last ten more years, cyclic codes over finite rings have become a hot issue for coding theorists.It is proved that R[x]/xn-1 is not a principal ideal domain, where R=2+u2 with u2=0, and n=2e. The nonzero ideals of R[x]/xn-1 are discussed in th...
In the last ten more years, cyclic codes over finite rings have become a hot issue for coding theorists.It is proved that R[x]/xn-1 is not a principal ideal domain, where R=2+u2 with u2=0, and n=2e. The nonzero ideals of R[x]/xn-1 are discussed in th...
2007, 29(5): 1127-1130.
doi: 10.3724/SP.J.1146.2005.01115
Abstract:
It is firstly proved that the non-independence among the candidates used in the Interleaved partitioning Partial Transmit Sequences (IPTS) results in the lower performance of IPTS, compared to the Adjacent partitioning PTS (APTS). More independent ca...
It is firstly proved that the non-independence among the candidates used in the Interleaved partitioning Partial Transmit Sequences (IPTS) results in the lower performance of IPTS, compared to the Adjacent partitioning PTS (APTS). More independent ca...
2007, 29(5): 1131-1135.
doi: 10.3724/SP.J.1146.2005.00989
Abstract:
The shift-variant property of discrete wavelet transform makes wavelet-domain motion estimation inaccurate. In order to overcome the shift-variant property, a 2-channel high-pass filtering method and a wavelet-domain motion estimation algorithm are p...
The shift-variant property of discrete wavelet transform makes wavelet-domain motion estimation inaccurate. In order to overcome the shift-variant property, a 2-channel high-pass filtering method and a wavelet-domain motion estimation algorithm are p...
2007, 29(5): 1136-1139.
doi: 10.3724/SP.J.1146.2005.01378
Abstract:
Based on the study of the relationship between the bit rate for video coding and the content complexity, this paper presents a new quadratic rate distortion model for video coding, which retains the constant term in Taylor series. Through introducing...
Based on the study of the relationship between the bit rate for video coding and the content complexity, this paper presents a new quadratic rate distortion model for video coding, which retains the constant term in Taylor series. Through introducing...
2007, 29(5): 1140-1144.
doi: 10.3724/SP.J.1146.2006.00293
Abstract:
Interference spectral images have their own features. The correlations between the spectral lines are weak. And the data in a spectral line have particularity, that is, the data vary abruptly in the main district and the rest data change monotonously...
Interference spectral images have their own features. The correlations between the spectral lines are weak. And the data in a spectral line have particularity, that is, the data vary abruptly in the main district and the rest data change monotonously...
2007, 29(5): 1145-1149.
doi: 10.3724/SP.J.1146.2005.01257
Abstract:
An improved channel estimation scheme based on estimation of parameters is presented for frequency-selective MIMO channels. In the algorithm, the propagation delays and the angles of multipath are firstly estimated by a modified TST-MUSIC algorithm. ...
An improved channel estimation scheme based on estimation of parameters is presented for frequency-selective MIMO channels. In the algorithm, the propagation delays and the angles of multipath are firstly estimated by a modified TST-MUSIC algorithm. ...
2007, 29(5): 1150-1154.
doi: 10.3724/SP.J.1146.2005.00807
Abstract:
The future OFDM systems are expected to operate at high transmit frequencies, at high capacities, at high levels of mobility, and the traditional one-tap equalizer is not applicable any more. In this paper, a novel frequency-domain Turbo equalization...
The future OFDM systems are expected to operate at high transmit frequencies, at high capacities, at high levels of mobility, and the traditional one-tap equalizer is not applicable any more. In this paper, a novel frequency-domain Turbo equalization...
2007, 29(5): 1155-1158.
doi: 10.3724/SP.J.1146.2005.01229
Abstract:
OFDMA is the extension of OFDM. Similar to OFDM, and it is also very sensitive to Carrier Frequency Offset (CFO). In this paper, a pilot-assisted carrier frequency offset estimation algorithm and a low-complexity CFO compensation algorithm are presen...
OFDMA is the extension of OFDM. Similar to OFDM, and it is also very sensitive to Carrier Frequency Offset (CFO). In this paper, a pilot-assisted carrier frequency offset estimation algorithm and a low-complexity CFO compensation algorithm are presen...
2007, 29(5): 1159-1162.
doi: 10.3724/SP.J.1146.2005.01209
Abstract:
The analysis of correlation matrix of the received signal proves that the energy of narrowband interference is compressed in the low rank subspace, interference subspace, and the energy of DSSS signal and AWGN uniformly distribute. The narrowband int...
The analysis of correlation matrix of the received signal proves that the energy of narrowband interference is compressed in the low rank subspace, interference subspace, and the energy of DSSS signal and AWGN uniformly distribute. The narrowband int...
2007, 29(5): 1163-1167.
doi: 10.3724/SP.J.1146.2005.01011
Abstract:
This paper presents a new frequency hopping system in HF (High Frequency) bands, which is called Differential Frequency Hopping (DFH) system. The frequency transition function and the method of signal detection are the key technologies in this system...
This paper presents a new frequency hopping system in HF (High Frequency) bands, which is called Differential Frequency Hopping (DFH) system. The frequency transition function and the method of signal detection are the key technologies in this system...
2007, 29(5): 1168-1172.
doi: 10.3724/SP.J.1146.2005.01245
Abstract:
By introducing full-rate Space-Time Block Coding (STBC) scheme, a Full-rate Space-Time Block Coded CDMA (FSTBC-CDMA) system model is given in this paper. Considering that existing space-time coded CDMA system has high decoding complexity, a low-compl...
By introducing full-rate Space-Time Block Coding (STBC) scheme, a Full-rate Space-Time Block Coded CDMA (FSTBC-CDMA) system model is given in this paper. Considering that existing space-time coded CDMA system has high decoding complexity, a low-compl...
2007, 29(5): 1173-1176.
doi: 10.3724/SP.J.1146.2005.01237
Abstract:
The four round MISTY-type and the three round dual MISTY-type transformation are optimized by replacing the first round pseudorandom permutation with XOR-universal permutation and employing identical pseudorandom permutation in the second and the thi...
The four round MISTY-type and the three round dual MISTY-type transformation are optimized by replacing the first round pseudorandom permutation with XOR-universal permutation and employing identical pseudorandom permutation in the second and the thi...
2007, 29(5): 1177-1181.
doi: 10.3724/SP.J.1146.2005.01236
Abstract:
A multi-service traitor tracing scheme on LIFP(Large Integer Factoring Problem) is proposed，the essential idea of which is that an equation based on LIFP is constructed and a parameter is introduced to transfer service private-key. In decryption proc...
A multi-service traitor tracing scheme on LIFP(Large Integer Factoring Problem) is proposed，the essential idea of which is that an equation based on LIFP is constructed and a parameter is introduced to transfer service private-key. In decryption proc...
2007, 29(5): 1182-1186.
doi: 10.3724/SP.J.1146.2005.01290
Abstract:
This paper proposes the alarm correlation and fault identification based on Bayesian networks in communication networks. At first, the basic concepts of Bayesian networks are introduced. Then the paper presents an approach for modeling large communic...
This paper proposes the alarm correlation and fault identification based on Bayesian networks in communication networks. At first, the basic concepts of Bayesian networks are introduced. Then the paper presents an approach for modeling large communic...
2007, 29(5): 1187-1190.
doi: 10.3724/SP.J.1146.2005.01240
Abstract:
Link Criticality Routing Algorithm (LCRA) is presented for Multi-Protocol Label Switch (MPLS) traffic engineering. It defines the link weight and chooses a path for a Label Switch Path set-up request through defining the average expectation load of l...
Link Criticality Routing Algorithm (LCRA) is presented for Multi-Protocol Label Switch (MPLS) traffic engineering. It defines the link weight and chooses a path for a Label Switch Path set-up request through defining the average expectation load of l...
2007, 29(5): 1191-1193.
doi: 10.3724/SP.J.1146.2005.01443
Abstract:
Based on control theory, a Proportional-Integral (PI) controller is designed which has a character of fast response. Consequently, a new Active Queue Management (AQM) scheme called Active PI algorithm (A-PI) is proposed, which employed double sets of...
Based on control theory, a Proportional-Integral (PI) controller is designed which has a character of fast response. Consequently, a new Active Queue Management (AQM) scheme called Active PI algorithm (A-PI) is proposed, which employed double sets of...
2007, 29(5): 1194-1197.
doi: 10.3724/SP.J.1146.2005.01379
Abstract:
A multi-priority delay reservation admission control scheme is proposed. In the scheme, different traffic has different delay threshold so as to provide network QoS. Numerical results show that either the service of high priority traffic or the servi...
A multi-priority delay reservation admission control scheme is proposed. In the scheme, different traffic has different delay threshold so as to provide network QoS. Numerical results show that either the service of high priority traffic or the servi...
2007, 29(5): 1198-1201.
doi: 10.3724/SP.J.1146.2006.00484
Abstract:
A novel dynamic scheduling algorithm for mobile streaming media based on the cache window and segment patch pre-fetching is proposed. It employs the scheme that the cache window size can be increased or decreased adaptively according to the popularit...
A novel dynamic scheduling algorithm for mobile streaming media based on the cache window and segment patch pre-fetching is proposed. It employs the scheme that the cache window size can be increased or decreased adaptively according to the popularit...
2007, 29(5): 1202-1205.
doi: 10.3724/SP.J.1146.2006.01219
Abstract:
To enhance the entire network lifetime of wireless sensor network, this paper puts forward a new transmission mechanism by redundant nodes basing on the characters that the sensor nodes are tiny and energy-limited. The method builds an redundant node...
To enhance the entire network lifetime of wireless sensor network, this paper puts forward a new transmission mechanism by redundant nodes basing on the characters that the sensor nodes are tiny and energy-limited. The method builds an redundant node...
2007, 29(5): 1206-1210.
doi: 10.3724/SP.J.1146.2006.00081
Abstract:
Based on the analysis of the communication status in real life Ad hoc networks, a new metric, which utilizes fame, available bandwidth and minimum hops, is presented in order to overcome the node selfishness and drawbacks of min-hop routing selection...
Based on the analysis of the communication status in real life Ad hoc networks, a new metric, which utilizes fame, available bandwidth and minimum hops, is presented in order to overcome the node selfishness and drawbacks of min-hop routing selection...
2007, 29(5): 1211-1214.
doi: 10.3724/SP.J.1146.2005.01351
Abstract:
Group mobility is the typical mobile mode in tactical Ad hoc networks. The characters of groups confine the shaping of zones for Zone Routing Protocol (ZRP) and affect the routing performance greatly. The introduction of location information can impr...
Group mobility is the typical mobile mode in tactical Ad hoc networks. The characters of groups confine the shaping of zones for Zone Routing Protocol (ZRP) and affect the routing performance greatly. The introduction of location information can impr...
2007, 29(5): 1215-1219.
doi: 10.3724/SP.J.1146.2005.01685
Abstract:
It is crucial to make Complicated Information System (CIS) secure, interoperable, extensible and controllable. This paper presents a secure CIS architecture model to conduct the construction or reconstruction of CIS. It divides CIS into layers to red...
It is crucial to make Complicated Information System (CIS) secure, interoperable, extensible and controllable. This paper presents a secure CIS architecture model to conduct the construction or reconstruction of CIS. It divides CIS into layers to red...
2007, 29(5): 1220-1223.
doi: 10.3724/SP.J.1146.2005.01281
Abstract:
Aiming at the issue of sensing coverage and connectivity in wireless sensor networks, A complete new algorithm is proposed, on the premise of sensors position aware. The algorithm adopts a clustering method and a decentralized sleeping method to redu...
Aiming at the issue of sensing coverage and connectivity in wireless sensor networks, A complete new algorithm is proposed, on the premise of sensors position aware. The algorithm adopts a clustering method and a decentralized sleeping method to redu...
2007, 29(5): 1224-1227.
doi: 10.3724/SP.J.1146.2005.01387
Abstract:
The importance of traffic prediction in Wireless Sensor Network (WSN) should not be disregarded. Concerning the ARMA model，a traffic prediction algorithm is proposed based on its own traffic characters. Simulation results show that the presented algo...
The importance of traffic prediction in Wireless Sensor Network (WSN) should not be disregarded. Concerning the ARMA model，a traffic prediction algorithm is proposed based on its own traffic characters. Simulation results show that the presented algo...
2007, 29(5): 1228-1231.
doi: 10.3724/SP.J.1146.2005.01310
Abstract:
The representation and similarity measure of time series are the basis of time series research, which is quite important to improving the efficiency and accuracy of the time series data mining. This paper proposes a shape-based discrete symbolic repr...
The representation and similarity measure of time series are the basis of time series research, which is quite important to improving the efficiency and accuracy of the time series data mining. This paper proposes a shape-based discrete symbolic repr...
2007, 29(5): 1232-1235.
doi: 10.3724/SP.J.1146.2005.01122
Abstract:
A fast domain decomposition method is presented for the solution of electromagnetic problems arising in three-dimensions. The original computation domain is meshed and decomposed into several nonoverlapping subdomains by edge-element partitioning tec...
A fast domain decomposition method is presented for the solution of electromagnetic problems arising in three-dimensions. The original computation domain is meshed and decomposed into several nonoverlapping subdomains by edge-element partitioning tec...
2007, 29(5): 1236-1239.
doi: 10.3724/SP.J.1146.2005.01375
Abstract:
A modified Particle Swarm Optimization (PSO) algorithm is proposed and used to optimize the sidelobe level of plane arrays, in which special techniques as global best perturbation and jumped inertia weight strategy are adopted. The PSO algorithm is a...
A modified Particle Swarm Optimization (PSO) algorithm is proposed and used to optimize the sidelobe level of plane arrays, in which special techniques as global best perturbation and jumped inertia weight strategy are adopted. The PSO algorithm is a...
2007, 29(5): 1240-1242.
doi: 10.3724/SP.J.1146.2005.01238
Abstract:
This paper analyzes the influence of difference of amplitude and phase between channels to interferometer receiver, in which calculated results are also given. Based on the essential principle of AGC, the model of eliminating imbalance is established...
This paper analyzes the influence of difference of amplitude and phase between channels to interferometer receiver, in which calculated results are also given. Based on the essential principle of AGC, the model of eliminating imbalance is established...
2007, 29(5): 1243-1246.
doi: 10.3724/SP.J.1146.2006.00227
Abstract:
This paper propose a quantitative analysis on the electromagnetic leakage from a shielded-twist-pair with a transverse slot. The mechanism of electromagnetic leakage is analyzed, and then the slotted shielded-twist-pair is regarded as a cascaded netw...
This paper propose a quantitative analysis on the electromagnetic leakage from a shielded-twist-pair with a transverse slot. The mechanism of electromagnetic leakage is analyzed, and then the slotted shielded-twist-pair is regarded as a cascaded netw...
2007, 29(5): 1247-1249.
doi: 10.3724/SP.J.1146.2006.00181
Abstract:
This paper presents a Local Osicillator (LO) buffer for WLAN which can tune the I/Q phase of the LO signal in order to calibrate IQ imbalance in direct conversion transceiver. It can tune the phase by means of switching the MOS capacitor array to del...
This paper presents a Local Osicillator (LO) buffer for WLAN which can tune the I/Q phase of the LO signal in order to calibrate IQ imbalance in direct conversion transceiver. It can tune the phase by means of switching the MOS capacitor array to del...
2007, 29(5): 1250-1253.
doi: 10.3724/SP.J.1146.2005.00779
Abstract:
This paper presents an improved power spectrum mathematical expresstion of several injection signals. Fourier series expansion is used to analyze the power spectrum of different injection pulses,such as sine,triangle and rectangle wave. On the basis ...
This paper presents an improved power spectrum mathematical expresstion of several injection signals. Fourier series expansion is used to analyze the power spectrum of different injection pulses,such as sine,triangle and rectangle wave. On the basis ...
2007, 29(5): 1254-1257.
doi: 10.3724/SP.J.1146.2005.01396
Abstract:
For monolithic RF spiral inductor on high-loss silicon substrate, a novel physical model is proposed, in which functions of skin effect, proximity effect and eddy current loss in the substrate to frequency-dependent series parameters Ls and Rs are ac...
For monolithic RF spiral inductor on high-loss silicon substrate, a novel physical model is proposed, in which functions of skin effect, proximity effect and eddy current loss in the substrate to frequency-dependent series parameters Ls and Rs are ac...
2007, 29(5): 1263-1266.
doi: 10.3724/SP.J.1146.2006.01300
Abstract:
First of all, the in-loaded and out-loaded technologies of resonant cavity being used in the multi-beam klystron and some associated microwave attenuating materials are analyzed and compared. Not only the ways of adjustment of out-loaded resonant cav...
First of all, the in-loaded and out-loaded technologies of resonant cavity being used in the multi-beam klystron and some associated microwave attenuating materials are analyzed and compared. Not only the ways of adjustment of out-loaded resonant cav...
2007, 29(5): 1267-1270.
doi: 10.3724/SP.J.1146.2005.01447
Abstract:
A new method for simulation line realization based on Back Propagation Neural Network (BP NN) is presented in the paper. Applying Genetic Algorithm (GA) to optimize the neural networks structure, BP NN is trained to correspond the transfer function o...
A new method for simulation line realization based on Back Propagation Neural Network (BP NN) is presented in the paper. Applying Genetic Algorithm (GA) to optimize the neural networks structure, BP NN is trained to correspond the transfer function o...
2007, 29(5): 1258-1262.
doi: 10.3724/SP.J.1146.2006.00886
Abstract:
In this paper, the basic factors of the techniques combining the polarimetric synthetic aperture radar (SAR) with interferometric SAR are considered firstly, and then the basic concepts of coherence optimization and target decomposition of polarimetr...
In this paper, the basic factors of the techniques combining the polarimetric synthetic aperture radar (SAR) with interferometric SAR are considered firstly, and then the basic concepts of coherence optimization and target decomposition of polarimetr...
