DS-CDMA反向链路相干解调算法的性能分析

Performance Analysis of the Reverse Link Coherent Demodulation DS CDMA

给出了一种在ＤＳ－ＣＤＭＡ移动通信系统中实现反向链路相干解调的方法，在不增加物理信道的情况下，利用信号帧中的导频符号来估计载波相位，实现反向链路的相干解调，并以ＱＰＳＫ为例分析其性能，在误码率相同的情况下，降低了所需的载噪比，从而增加了系统的容量．

A new method which is used to realize the coherent detection of reverse link in a DS CDMA mobile communication system is proposed. It doesn't need to add a new pilot channel, under this condition we make use of the pilot symbol in the data frame. The pilot symbol is used to estimate the carrier phase and thus the coherent demodulation can be obtained. We take QPSK as an example and analysis the performance of the system.