基于带通采样QPSK高速解调器的技术分析  

Technical Analysis of QPSK High Speed Demodulator Based on Band-pass Sampling

作　　者：刘会红[1] 林春霞[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2011年第1期59-61,共3页Radio Communications Technology

摘　　要：首先通过对带通采样定理的分析,提出了正交相移键控(QPSK)高速解调器的实现方案,着重对带通采样解调算法中时钟的选取、并行匹配滤波算法、载波恢复算法和定时估计算法进行了详细描述,并用硬件编程语言编写了整个算法的代码,最后在硬件平台上下载了代码文件,验证了解调性能,测试结果表明,采用该算法实现的高速解调器在性能上有了很大的提高。An implementation scheme of QPSK high speed demodulator based on band-pass sampling theory is proposed. The clock selection, parallel matched filter algorithm, carrier recovery algorithm and bit synchronization algorithm in the band-pass sampling algorithm are particularly described. Then the algorithm codes are compiled by VHDL. Finally, through hardware realization, the test result indicates that by adopting the algorithm, the performance of high speed demodulator is improved greatly.

关 键 词：QPSK 带通采样 并行匹配滤波 载波恢复 

分 类 号：TN911[电子电信—通信与信息系统]