基于互谱分析的2DPSK解调方法及性能  

A Novel 2DPSK Demodulation Method Based on Cross Spectra Analysis

作　　者：马雯[1] 黄建国[2] 张群飞[2] 

机构地区：[1]上海交通大学电子工程系,上海200030 [2]西北工业大学航海学院,陕西西安710072

出　　处：《海洋技术》2004年第3期30-33,共4页Ocean Technology

摘　　要：针对 2 DPSK调制方式 ,提出了通过对相邻两个码元信号求互谱来获取相对相位信息的互谱解调法。该方法通过在频域进行 FFT处理求得相邻两个码元信号的互功率谱 ,并将其峰值点相位与 0及 π进行比较 ,从而获得相应的传输比特信息。计算机仿真表明 ,在无多径干扰及存在一定多径干扰的水声信道条件下 。Aimed at 2DPSK modulation, the cross spectra demodulation method that obtains relative phase information through calculating the cross spectra of two neighboring symbol signals is proposed. During the calculation, FFT can be conducted in frequency domain. Both the computer simulation and ocean experiment results indicate that the performance of the cross spectra demodulation method is better than that of the differential demodulation method under certain multi-path interference.

关 键 词：互谱分析 2DPSK 解调 相位信息 码元信号 

分 类 号：TB56[交通运输工程—水声工程]