π/4 DQPSK解调算法的研究与仿真  

Research and simulation on π/4 DQPSK demodulation algorithm

作　　者：骆艳卜[1] 金伟[1] 柏雪倩[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077

出　　处：《电子测量技术》2009年第1期17-20,共4页Electronic Measurement Technology

摘　　要：针对数字通信系统中符号间干扰(ISI)问题,提出了一种适用于π/4 DQPSK解调的自适应盲均衡和载波恢复算法。T/4 CMA盲均衡器利用接收信号的所有采样点进行迭代,解决了采样相位敏感的问题;改进的载波恢复算法简单易于实现,减小了接收机设计的复杂度和难度。仿真结果表明,这种算法复杂度小、性能好,具有一定的实用价值。A kind of adaptive blind equalization and carrier recovery algorithm suitable for π/4 DQPSK demodulation has been presented with Inter-Symbol Interference of digital communication system. The T/4 CMA blind equalizer makes full use of all eight samples of the received signal to proceed convergence. The equalizer isn＇t sensitive to the sampling phase;The modified carrier recovery algorithm is very easy to be implemented. Both result in reducing the complexity and difficulty of the receiver. The computer simulation indicates that this joint algorithm has low complexity and perfect performance. So it is very useful for practice use.

关 键 词：π/4 DQPSK 自适应盲均衡 载波恢复 

分 类 号：TN914.3[电子电信—通信与信息系统]