時間拡散PPM/CDMAシステムにおける中心周波数オフセット干渉

概要

論文の詳細を見る
Time spread(TS)pulse position modulation(PPM)signals have been proposed for CDMA applications, where the envelope detection is employed instead of coherent detection for easier synchronization of PPM. In the time spread PPM/CDMA system, due to the difficulty to maintain the reference carrier, the envelope detector is employed in the receiver. So in the despreading filter, there exists some kind of central frequency offset which will interfere the desired signal. In order to analyze the effect of frequency offset interference, it is necessary to derive probability density function(pdf)of the output of envelope detector in the presence of interference. However, because of there are many different kinds of PN sequence, it is impractical to evaluate the pdf except using moment technique.
社団法人電子情報通信学会の論文
1997-08-13