基于相关技术的MPSK DS/CDMA载波跟踪

Carrier Recovery Based on Correlation Technique

提出了一个在ＭＰＳＫ ＤＳ／ＣＤＭＡ接收机中进行载波跟踪的新方案．该方案用两个对称的Ｘ相关器形成一个鉴频器．理论分析表明，该方案的跟踪范围是符号速率的两倍，并且与ＭＰＳＫ的键控相位数及扩频码的码长无关．

This paper presents a new method for carrier recovery in a direct sequence (DS) code division multi-access (CDMA) receiver. The data demodulation scheme used is multiple phase shift keying (MPSK). The proposed scheme employs two balanced X-correlators to form a frequency discriminator. Theoretical analysis indicates that the proposed method has a tracking range that doubles the symbol rate, and the tracking range is independent of the keying phase number of the MPSK modulation.