分数间隔采样的并行均衡新算法  

Parallel algorithm for fractionally spaced equalization

作　　者：邓拥军[1] 杨知行 郭兴波[1] 

机构地区：[1]清华大学电子工程系微波与数字通信技术国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第1期13-16,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2002AA783020)

摘　　要：由于模拟接收机在宽带条件下的性能不稳定等缺点,全数字接收机逐渐引起了人们的兴趣。针对一种全数字并行接收机结构(APRX),提出了一种分数间隔的并行均衡新算法(PFSE)。该算法基于恒模算法(CMA),充分利用了APRX中的数据重叠特点,实现了与上述APRX结构的完美结合。此外,还分析了由于该并行均衡器的引入,对APRX环路稳定性、环路噪声带宽等性能所产生的影响。仿真结果表明:该并行分数间隔均衡器的性能相对于波特间隔采样的均衡器具有明显的优势,而且相对于串行分数间隔均衡器,就消除串扰能力而言,该并行算法基本上没有带来损失。The all-digital parallel receiver (APRX) is more stable than analog receivers for wideband operations. A parallel algorithm for fractionally spaced equalization was developed for use with the APRX. The algorithm incorporates the constant modulus algorithm to implement a perfect match with the APRX's structure taking best advantage of its overlapping data characteristic. Analysis of the loop stability and loop noise bandwidth of the APRX with the fractionally spaced equalization algorithm shows that the algorithm is more effective than the T-Spaced Equalizer. In addition, there is hardly any loss of the ability to eliminate ISI compared with the serial fractionally spaced equalized algorithm.

关 键 词：微波通信 恒模算法 并行分数间隔均衡器 全数字并行接收机 

分 类 号：TN925.91[电子电信—通信与信息系统]