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Volume 31 Issue 11
Dec.  2010
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Zhou Jia-xi, Xu Xiao-dong, Xu Pei-xia, Dai Xu-chu. A Blind Estimation Algorithm of the Frequency-Shaping Pulse of CPM-Signal[J]. Journal of Electronics & Information Technology, 2009, 31(11): 2637-2642. doi: 10.3724/SP.J.1146.2008.01560
Citation: Zhou Jia-xi, Xu Xiao-dong, Xu Pei-xia, Dai Xu-chu. A Blind Estimation Algorithm of the Frequency-Shaping Pulse of CPM-Signal[J]. Journal of Electronics & Information Technology, 2009, 31(11): 2637-2642. doi: 10.3724/SP.J.1146.2008.01560

A Blind Estimation Algorithm of the Frequency-Shaping Pulse of CPM-Signal

doi: 10.3724/SP.J.1146.2008.01560
  • Received Date: 2008-11-26
  • Rev Recd Date: 2009-04-30
  • Publish Date: 2009-11-19
  • Frequency-shaping pulse is one of the essential modulation parameters for the demodulation of Continuous Phase Modulation (CPM), and it is determined by the pulse shape and pulse length. In this paper, based on the features of the auto-correlation of CPM-signal, an in-depth study is proposed on the internal relationship of the modulation parameters and the auto-correlation function of CPM-signal. Then a blind estimation algorithm of frequency-shaping pulse is developed. First, the pulse shape is identified; second, the modulation index of the CPM-signal is adjusted to an integer; Finally, the pulse length is estimated using the number of non-zero value of auto-correlation function of CPM-signal. The simulation study shows that the proposed algorithm has the ability to provide a good estimation of frequency-shaping pulse of CPM-signal with any arbitrary modulation order and modulation index. In addition, the algorithm design is computation efficient and thus facilitates hardware implementation.
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  • Proakis J G. Digital Communications [M]. 4th ed, New York,McGraw-Hill, 2001, Chapter 4-5.[2]Bianchi P, Loubaton P, and Sirven F. On the blind estimationof the parameters of continuous phase modulated signals [J].IEEE Transactions on Communications, 2005, 23(5):944-962.[3]Fonollosa J R and Fonollosa J A R. Estimation of themodulation index of CPM signals using higher order statistics[C][J].ICASSP93, Minneapolis.1993, 4:268-271[4]Nikias C L and Fonollosa J R. Analysis of CPM signals usinghigher order statistics [C][J].MILCOM93, Bedford.1993, 2:663-667[5]Shen Wen-li, Zhao Min-jian, and Qiu Pei-liang, et al.. dataaided symbol timing estimation in space-time coded CPMsystems over rayleigh fading channels [C]. VehicularTechnology Conference. IEEE 66th, Baltimore, 2007:556-560.[6]Zhao Qing and Stber G L. Robust time and phasesynchronization for continuous phase modulation [J].IEEETransactions on Communications.2006, 54(10):1857-1869[7]Xian Liang, Punnoose R, and Liu Hua-ping. Simplifiedreceiver design for STBC binary continuous phasemodulation [J]. IEEE Transactions on WirelessCommunications, 2008, 7(2): 452-457.[8]方继承, 贾哲, 于全. 指数函数分解法的CPM 非相干序列估计[J]. 电子科技大学学报, 2008, 37(3): 358-360.Fang Ji-cheng, Jia Zhe, and Yu Quan. A NSE algorithm forCPM based on exponential functions decomposition [J].Journal of University of Electronic Science and Technology ofChina, 2008, 37(3): 358-360.
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