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2012 Vol. 34, No. 1
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2012, 34(1): 1-6.
doi: 10.3724/SP.J.1146.2011.00493
Abstract:
This paper concerns the concurrent communication interference problem that cognitive user conducts to primary users receiver under cognitive radio network. Adopted the Information theory viewpoint, it analyzes the interference power that cognitive us...
This paper concerns the concurrent communication interference problem that cognitive user conducts to primary users receiver under cognitive radio network. Adopted the Information theory viewpoint, it analyzes the interference power that cognitive us...
2012, 34(1): 7-13.
doi: 10.3724/SP.J.1146.2011.00429
Abstract:
In this paper the frequency turbo equalization is investigated for Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) systems with transmitter In-phase and Quadrature Imbalance (IQI) interference caused by ...
In this paper the frequency turbo equalization is investigated for Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) systems with transmitter In-phase and Quadrature Imbalance (IQI) interference caused by ...
2012, 34(1): 14-19.
doi: 10.3724/SP.J.1146.2011.00393
Abstract:
Compressed sensing offers a new wideband spectrum sensing scheme in cognitive radio. This paper presents a cooperative sensing scheme based on compressed sensing to sense channel energies without reconstructing the wideband spectrum. Multiple seconda...
Compressed sensing offers a new wideband spectrum sensing scheme in cognitive radio. This paper presents a cooperative sensing scheme based on compressed sensing to sense channel energies without reconstructing the wideband spectrum. Multiple seconda...
2012, 34(1): 20-25.
doi: 10.3724/SP.J.1146.2010.01421
Abstract:
The estimation of multiple timing offsets and multiple frequency offsets in cooperative relay system is investigated. A synchronization sequence based on constant amplitude zero auto-correlation sequence is constructed. Furthermore, the corresponding...
The estimation of multiple timing offsets and multiple frequency offsets in cooperative relay system is investigated. A synchronization sequence based on constant amplitude zero auto-correlation sequence is constructed. Furthermore, the corresponding...
2012, 34(1): 26-32.
doi: 10.3724/SP.J.1146.2011.00163
Abstract:
Considering Traffic Rate Feedback (CTRF) is proposed for Orthogonal Frequency Division Multiple (OFDM) relay system with different user traffic rate. According to user traffic rate and channel gain, CTRF adjusts dynamically the value of feedback util...
Considering Traffic Rate Feedback (CTRF) is proposed for Orthogonal Frequency Division Multiple (OFDM) relay system with different user traffic rate. According to user traffic rate and channel gain, CTRF adjusts dynamically the value of feedback util...
2012, 34(1): 33-37.
doi: 10.3724/SP.J.1146.2011.00500
Abstract:
The Triple Correlation Function (TCF) and the partial TCF of sampled m-sequence are studied and described in this paper. To recognize synchronization codes of secure communications, a recognition method is proposed firstly based on the peak feature o...
The Triple Correlation Function (TCF) and the partial TCF of sampled m-sequence are studied and described in this paper. To recognize synchronization codes of secure communications, a recognition method is proposed firstly based on the peak feature o...
2012, 34(1): 38-44.
doi: 10.3724/SP.J.1146.2011.00539
Abstract:
A joint design of FPGA-based encoder and decoder of LDPC codes is proposed. In this new design, the LDPC encoder and decoder share the same parity-check calculation circuit and the same RAM block, resulting in significantly reduced resource consumpti...
A joint design of FPGA-based encoder and decoder of LDPC codes is proposed. In this new design, the LDPC encoder and decoder share the same parity-check calculation circuit and the same RAM block, resulting in significantly reduced resource consumpti...
2012, 34(1): 45-50.
doi: 10.3724/SP.J.1146.2011.00471
Abstract:
To improve the performance of video transmission over Wireless Local Area Networks (WLAN), a dynamic mapping scheme based on Enhanced Distributed Channel Access (EDCA) is proposed. This scheme builds initially the importance-based sorting model for v...
To improve the performance of video transmission over Wireless Local Area Networks (WLAN), a dynamic mapping scheme based on Enhanced Distributed Channel Access (EDCA) is proposed. This scheme builds initially the importance-based sorting model for v...
2012, 34(1): 51-56.
doi: 10.3724/SP.J.1146.2011.00528
Abstract:
The Doppler effect is inherent in communication systems which makes the carrier synchronization critical to the whole system. In underwater communication environment, the Doppler effect is more severe due to the limited sound speed. In this paper, th...
The Doppler effect is inherent in communication systems which makes the carrier synchronization critical to the whole system. In underwater communication environment, the Doppler effect is more severe due to the limited sound speed. In this paper, th...
2012, 34(1): 57-62.
doi: 10.3724/SP.J.1146.2011.00383
Abstract:
In order to study the effect of terminal moving on QoS in wireless networks, a cross-layer network calculus model is established to calculate the delay and backlog performance parameters when communication terminals are under different moving speeds....
In order to study the effect of terminal moving on QoS in wireless networks, a cross-layer network calculus model is established to calculate the delay and backlog performance parameters when communication terminals are under different moving speeds....
2012, 34(1): 63-68.
doi: 10.3724/SP.J.1146.2011.00425
Abstract:
An energy-efficient Location-Based Cooperative Routing (LBCR) algorithm is proposed to reduce the overall transmission power for routing in wireless networks. With theoretical analysis, appropriate relay node can reduce the transmission power of the ...
An energy-efficient Location-Based Cooperative Routing (LBCR) algorithm is proposed to reduce the overall transmission power for routing in wireless networks. With theoretical analysis, appropriate relay node can reduce the transmission power of the ...
2012, 34(1): 69-74.
doi: 10.3724/SP.J.1146.2011.00366
Abstract:
Localized network coding is a promising technique to improve the performance of a wireless multihop network when multiple concurrent unicast sessions are present in the network. However, most existing mechanisms in this field do not consider the issu...
Localized network coding is a promising technique to improve the performance of a wireless multihop network when multiple concurrent unicast sessions are present in the network. However, most existing mechanisms in this field do not consider the issu...
Stability for Non-cooperative Program Game Model of the Capacity Analysis for Mobile Ad hoc Networks
2012, 34(1): 75-81.
doi: 10.3724/SP.J.1146.2011.00420
Abstract:
The stability of non-cooperative program game model of the capacity analysis for mobile Ad hoc networks is investigated. First of all, the evolutive equations for the send nodes flow transmit speed of non-cooperative programming game Mobile Ad hoc NE...
The stability of non-cooperative program game model of the capacity analysis for mobile Ad hoc networks is investigated. First of all, the evolutive equations for the send nodes flow transmit speed of non-cooperative programming game Mobile Ad hoc NE...
2012, 34(1): 82-88.
doi: 10.3724/SP.J.1146.2011.00257
Abstract:
The Internet growth coupled with the variety of multicast services is creating an increasing need for multicast traffic support by routers and packet switches. However, the traditional crossbar-based multicast scheduling schemes are unable to meet th...
The Internet growth coupled with the variety of multicast services is creating an increasing need for multicast traffic support by routers and packet switches. However, the traditional crossbar-based multicast scheduling schemes are unable to meet th...
2012, 34(1): 89-94.
doi: 10.3724/SP.J.1146.2011.00311
Abstract:
To provide end-to-end QoS provisioning in heterogeneous wireless networks and meet the requirements of existing and future network applications, is a challenge in next generation networks. QoS mapping is an effective technology to resolve the problem...
To provide end-to-end QoS provisioning in heterogeneous wireless networks and meet the requirements of existing and future network applications, is a challenge in next generation networks. QoS mapping is an effective technology to resolve the problem...
2012, 34(1): 95-100.
doi: 10.3724/SP.J.1146.2011.00592
Abstract:
In surveillance wireless sensor networks, the reliable transport of urgent information is a key issue for accurate reporting of events. This paper studies the characteristics of urgent information, and proposes a Reliable Transport Protocol for Urgen...
In surveillance wireless sensor networks, the reliable transport of urgent information is a key issue for accurate reporting of events. This paper studies the characteristics of urgent information, and proposes a Reliable Transport Protocol for Urgen...
2012, 34(1): 101-107.
doi: 10.3724/SP.J.1146.2011.00039
Abstract:
With the manner of storing-carrying-forwarding, nodes can communicate with each other in opportunistic network, but the limited buffer should be used reasonably. Based on message redundancy estimating, an adaptive buffer management mechanism is propo...
With the manner of storing-carrying-forwarding, nodes can communicate with each other in opportunistic network, but the limited buffer should be used reasonably. Based on message redundancy estimating, an adaptive buffer management mechanism is propo...
2012, 34(1): 108-114.
doi: 10.3724/SP.J.1146.2011.00532
Abstract:
Path traverse is a kind of important software testing method of software test. However, as the number of paths of software is usually exponential, to test every path is unpractical. From the point view of software security test, the execution of crit...
Path traverse is a kind of important software testing method of software test. However, as the number of paths of software is usually exponential, to test every path is unpractical. From the point view of software security test, the execution of crit...
2012, 34(1): 115-120.
doi: 10.3724/SP.J.1146.2011.00462
Abstract:
Based on binary periodic complementary sequence sets, constructions of binary or quaternary periodic complementary sequence sets with Zero Correlation Zone (ZCZ) are proposed. The resultant binary ZCZ periodic complementary sequence set is constructe...
Based on binary periodic complementary sequence sets, constructions of binary or quaternary periodic complementary sequence sets with Zero Correlation Zone (ZCZ) are proposed. The resultant binary ZCZ periodic complementary sequence set is constructe...
2012, 34(1): 121-127.
doi: 10.3724/SP.J.1146.2011.00091
Abstract:
In the paper, the partial Hilbert spectrum near the frequency of the target ridge and average bandwidth of the real sea clutter data is analyzed, and the influence of the target and polarization on the ridge and the average bandwidth of the partial H...
In the paper, the partial Hilbert spectrum near the frequency of the target ridge and average bandwidth of the real sea clutter data is analyzed, and the influence of the target and polarization on the ridge and the average bandwidth of the partial H...
2012, 34(1): 128-133.
doi: 10.3724/SP.J.1146.2011.00264
Abstract:
In High Range-Resolution (HRR) radar, a target extends probably more than one range bins and the parametric adaptive detection is studied in this paper for such distributed target, where the disturbances in both primary and secondary data are represe...
In High Range-Resolution (HRR) radar, a target extends probably more than one range bins and the parametric adaptive detection is studied in this paper for such distributed target, where the disturbances in both primary and secondary data are represe...
2012, 34(1): 134-139.
doi: 10.3724/SP.J.1146.2011.00294
Abstract:
The Ultra Wide-Band Short-Pulse (UWB-SP) radar used for detecting targets is a promising technique in fire rescue operations, police awareness, urban-warfare, life-threatening and other fields, and it can be used for noncontact measurement of the tra...
The Ultra Wide-Band Short-Pulse (UWB-SP) radar used for detecting targets is a promising technique in fire rescue operations, police awareness, urban-warfare, life-threatening and other fields, and it can be used for noncontact measurement of the tra...
2012, 34(1): 140-147.
doi: 10.3724/SP.J.1146.2011.00466
Abstract:
The ability to reconstructing the terrain height profile of MIMO InSAR outperforms the ordinary multibaseline InSAR. One key technology of MIMO InSAR is the echo separation on the receiver. The available orthogonal signals introduce great cross-inter...
The ability to reconstructing the terrain height profile of MIMO InSAR outperforms the ordinary multibaseline InSAR. One key technology of MIMO InSAR is the echo separation on the receiver. The available orthogonal signals introduce great cross-inter...
2012, 34(1): 148-153.
doi: 10.3724/SP.J.1146.2011.00494
Abstract:
Time delay Active Radar Calibrator (ARC) is the crucial equipment for image quality evaluation and radiation calibration of Synthetic Aperture Radar (SAR). The technique of time delay in ARC will reduce the influence of local noise and improve the me...
Time delay Active Radar Calibrator (ARC) is the crucial equipment for image quality evaluation and radiation calibration of Synthetic Aperture Radar (SAR). The technique of time delay in ARC will reduce the influence of local noise and improve the me...
2012, 34(1): 154-159.
doi: 10.3724/SP.J.1146.2011.00232
Abstract:
The channel imbalances will reduce the performances of the multi-channel synthetic-bandwidth SAR system, so measures should be taken to correct them. In this paper, a correction method based on the raw data is presented. Before acquiring the syntheti...
The channel imbalances will reduce the performances of the multi-channel synthetic-bandwidth SAR system, so measures should be taken to correct them. In this paper, a correction method based on the raw data is presented. Before acquiring the syntheti...
2012, 34(1): 160-165.
doi: 10.3724/SP.J.1146.2011.00576
Abstract:
The issue of joint estimation of Direction Of Departure (DOD), Direction Of Arrive (DOA) and polarization for MIMO radar with electromagnetic vector sensors is investigated. A novel bistatic MIMO radar system with multiple transmit sensors and multip...
The issue of joint estimation of Direction Of Departure (DOD), Direction Of Arrive (DOA) and polarization for MIMO radar with electromagnetic vector sensors is investigated. A novel bistatic MIMO radar system with multiple transmit sensors and multip...
2012, 34(1): 166-171.
doi: 10.3724/SP.J.1146.2011.00302
Abstract:
Positioning method aims to get the geographical coordinates of each pixel in SAR images. It is necessary to calibrate the parameters of the positioning model to increase precision. This paper presents a method based on sensitivity equations to calibr...
Positioning method aims to get the geographical coordinates of each pixel in SAR images. It is necessary to calibrate the parameters of the positioning model to increase precision. This paper presents a method based on sensitivity equations to calibr...
2012, 34(1): 172-178.
doi: 10.3724/SP.J.1146.2011.00279
Abstract:
By emitting H- and V-polarized pulses adjacently and receiving echoes with duo-polarized channels, multidimensional waveform encoding fully-polarimetric Synthetic Aperture Radar (SAR) can obtain all polarimetric components in one Pulse Repetition Int...
By emitting H- and V-polarized pulses adjacently and receiving echoes with duo-polarized channels, multidimensional waveform encoding fully-polarimetric Synthetic Aperture Radar (SAR) can obtain all polarimetric components in one Pulse Repetition Int...
2012, 34(1): 179-186.
doi: 10.3724/SP.J.1146.2011.00478
Abstract:
Synthetic Aperture Radar (SAR) plays a very important role in ocean remote sensing. Current movement and ocean wave transmission are crucial constituent part of ocean dynamic information. However, regular SAR ocean image processing treats SAR image a...
Synthetic Aperture Radar (SAR) plays a very important role in ocean remote sensing. Current movement and ocean wave transmission are crucial constituent part of ocean dynamic information. However, regular SAR ocean image processing treats SAR image a...
2012, 34(1): 187-193.
doi: 10.3724/SP.J.1146.2011.00216
Abstract:
The SAR raw signal simulator in the time domain by the target-by-target method is inefficient, while the simulator in the two-dimensional (2-D) frequency domain can not be directly used to generate the Terrain Observation by Progressive Scans (TOPS) ...
The SAR raw signal simulator in the time domain by the target-by-target method is inefficient, while the simulator in the two-dimensional (2-D) frequency domain can not be directly used to generate the Terrain Observation by Progressive Scans (TOPS) ...
2012, 34(1): 194-199.
doi: 10.3724/SP.J.1146.2011.00545
Abstract:
In order to construct a high-dimensional data approximate model in the purpose of the best coverage of the distribution of high-dimensional samples, the classification algorithm of multiple observation samples based on L1 norm convex hull data descri...
In order to construct a high-dimensional data approximate model in the purpose of the best coverage of the distribution of high-dimensional samples, the classification algorithm of multiple observation samples based on L1 norm convex hull data descri...
2012, 34(1): 200-206.
doi: 10.3724/SP.J.1146.2011.00377
Abstract:
Image splicing is the most fundamental operation of creating an image forgery, thus the detection and localization of image splicing attract increasing attention recently. In this paper, a blind and passive approach of splicing localization is propos...
Image splicing is the most fundamental operation of creating an image forgery, thus the detection and localization of image splicing attract increasing attention recently. In this paper, a blind and passive approach of splicing localization is propos...
2012, 34(1): 207-212.
doi: 10.3724/SP.J.1146.2011.00424
Abstract:
Based on global sparse representation of image and local property of the patch, an efficient compressive imaging algorithm is proposed, which combined two priors: the low dimensional manifold property of local image patch and the sparse representatio...
Based on global sparse representation of image and local property of the patch, an efficient compressive imaging algorithm is proposed, which combined two priors: the low dimensional manifold property of local image patch and the sparse representatio...
2012, 34(1): 213-217.
doi: 10.3724/SP.J.1146.2011.00477
Abstract:
Hilbert-Huang Transform (HHT) is a fully data driven adaptive non-stationary signal time-frequency analysis method. But the Hilbert energy spectrum curve of speech signal is fluctuate in strong noise environment，it has a great influence to voice acti...
Hilbert-Huang Transform (HHT) is a fully data driven adaptive non-stationary signal time-frequency analysis method. But the Hilbert energy spectrum curve of speech signal is fluctuate in strong noise environment，it has a great influence to voice acti...
2012, 34(1): 218-222.
doi: 10.3724/SP.J.1146.2011.00447
Abstract:
In order to analyze the performance of Single-Carrier (SC) 60 GHz communication system, a structure of physical layer is designed based on IEEE 802.11ad standard. The impacts of hardware impairments on the communication performance are studied, inclu...
In order to analyze the performance of Single-Carrier (SC) 60 GHz communication system, a structure of physical layer is designed based on IEEE 802.11ad standard. The impacts of hardware impairments on the communication performance are studied, inclu...
2012, 34(1): 223-226.
doi: 10.3724/SP.J.1146.2011.00300
Abstract:
The handoff mechanism, a key technology to support the user seamless mobile services in wireless communication system, has a great impact on users services experiences and application. This paper presents the auxiliary handoff mechanism based on cont...
The handoff mechanism, a key technology to support the user seamless mobile services in wireless communication system, has a great impact on users services experiences and application. This paper presents the auxiliary handoff mechanism based on cont...
2012, 34(1): 227-230.
doi: 10.3724/SP.J.1146.2011.00475
Abstract:
Zero-correlation linear cryptanalysis is a newly proposed attack of block ciphers. The first step of this cryptanalysis is to construct a zero-correlation linear hull whose correlation value is 0. This paper investigates the construction of zero-corr...
Zero-correlation linear cryptanalysis is a newly proposed attack of block ciphers. The first step of this cryptanalysis is to construct a zero-correlation linear hull whose correlation value is 0. This paper investigates the construction of zero-corr...
2012, 34(1): 231-235.
doi: 10.3724/SP.J.1146.2010.01416
Abstract:
To lower cost of testing digital integrated circuits, compressing precomputed test set is an effective resolution way. A dictionary compression scheme using entry derivative and two-level coding is proposed based on digits of index far fewer than tha...
To lower cost of testing digital integrated circuits, compressing precomputed test set is an effective resolution way. A dictionary compression scheme using entry derivative and two-level coding is proposed based on digits of index far fewer than tha...
