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Volume 29 Issue 8
Jan.  2011
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Ma Xiao-hui, Zou Chuan-yun. Power Spectral Density of Digital Ultra Wide-band Signals[J]. Journal of Electronics & Information Technology, 2007, 29(8): 1877-1881. doi: 10.3724/SP.J.1146.2005.01656
Citation: Ma Xiao-hui, Zou Chuan-yun. Power Spectral Density of Digital Ultra Wide-band Signals[J]. Journal of Electronics & Information Technology, 2007, 29(8): 1877-1881. doi: 10.3724/SP.J.1146.2005.01656

Power Spectral Density of Digital Ultra Wide-band Signals

doi: 10.3724/SP.J.1146.2005.01656
  • Received Date: 2005-12-22
  • Rev Recd Date: 2006-05-26
  • Publish Date: 2007-08-19
  • In this paper, a unified model of the random impulse radio signals is presented based on the characters of a variety of UWB modulation signals. The Power Spectral Density(PSD)for the signals is carried out using stochastic theory. This PSD expression is used widely, such as for various modulation forms, various multi-access forms, either binary or M-ary systems. The PSD expressions for several typical modulation signals with or without the uniformly distributed timing jitter are taken for example and analyzed in details. The results show that the timing jitter smoothes the spectrum and alleviates the interferences on other narrowband communication systems. Furthermore, the results can be used to estimate the effect of changes in various parameters on PSD of transmitted signal, without going through the detailed design procedure.
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  • (美) Proakis J G著.张力军等译.数字通信(第四版)Digital Communications(fourth edition). 北京:电子工业出版社,2003: 53-56.[2]Scholtz R A. How do you define bandwidth?.In Proc. International Telemetering Conference, Los Angeles, California, Oct. 1972: 281-288.[3]Win M Z. On the power spectral density of digital pulse streams generated by M-ary cyclostatio-nary sequence in thepresence of stationary timing jitter[J].IEEE Trans. on Commun.1998, 46(9):1135-1145[4]Glisic S G. Power density spectrum of the product of two time-displaced versions of a maximum length binary pseudonoise signal. IEEE Trans. on Commun., 1983, COM- 31(2): 281-286.[5]Scholtz R A. The origins of spread-spectrum communications. IEEE Trans. on Cmmun., 1982, COM-30(5): 822-854.[6]Pronios N B and Polydoros A. On the power spectral density of certain digitally modulated signals with applications to code despreading. IEEE J. Select. Areas Commun., 1990, SAC-8(5): 837-852.[7]Win M Z. Spectral density of random UWB signals[J].IEEE Communications Letters.2002, 6(12):526-528[8](美) Brockwell P J, Davis R A著. 田铮译. 时间序列的理论与方法. 北京:高等教育出版社,2001,第四章.[9]张贤达,保铮著. 通信信号处理. 北京:国防工业出版社,2000: 13-17.[10]马晓慧. 冲激无线电超宽带新调制方法研究. [硕士论文],桂林: 桂林电子科技大学,2006.
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