This paper investigates the error rate performance of parallel combinatorial spread spectrum (PC/SS) communication systems that use coherent and differential multiphase modulation: multiphase parallel combinatorial spread spectrum (MPC/SS) communication systems. The PC/SS systems are multicode SS systems based on orthogonal pseudo-noise (PN) sequences. Data is transmitted by delivering a combination of multiple PN sequences among a set of pre-assigned PN sequences. In the MPC/SS systems, every PN sequence on transmission is modulated by q-ary coherent or differential phase shift keying (PSK). Symbol error rate (SER) and average bit error rate (BER) in coherent and differential MPC/SS systems are investigated. The BER comparison between the MPC/SS systems and simple multicode SS systems with q-ary coherent and differential PSK is also presented. Numerical results show that the MPC/SS systems are superior to the conventional q-ary PSK systems, if they have equal spectral efficiency.
雑誌名
IEICE transactions on fundamentals of electronics, communications and computer sciences
巻
E80-A
号
7
ページ
1196 - 1203
発行年
1997-07
出版者
The Institute of Electronics, Information and Communication Engineers
Error rate analysis of coherent and differential multiphase parallel combinatorial spread spectrum communication systems
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