Spectral characteristics of M-ary code shift keying based impulse radios:: Effects of code design

被引:5
作者
Erkuecuek, Serhat [1 ]
Kim, Dong In [1 ]
机构
[1] Simon Fraser Univ, Sch Engn Sci, Burnaby, BC V5A 1S6, Canada
关键词
M-ary code shift keying (MCSK); impulse radios (IRs); ultra wideband (UWB) communications; power spectral density (PSD); time hopping (TH) code set design;
D O I
10.1109/TWC.2007.05804
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper analyzes the power spectral density (PSD) characteristics of ultra wideband (UWB) signals modulated by M-ary code shift keying (MCSK) that can be combined with binary pulse position modulation (BPPM) and binary pulse amplitude modulation (BPAM), which we refer to as MCSK based impulse radios (IRs). MCSK based IRs are modified IRs that were designed to increase the data rate of conventional IRs by embedding the data on a time hopping (TH) code randomly selected from a set of M distinct TH codes per user. This random selection also results in increased effective TH code period, which helps smoothing the continuous spectrum and suppressing the discrete spectral components. In combination with the random code selection, design of the TH code set for each user is very important for spectrum shaping and multiple access (MA) capability, and is addressed in detail in the paper.
引用
收藏
页码:2266 / 2275
页数:10
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