作　　者： ; ;

机构地区： 东南大学信息科学与工程学院无线电工程系

出　　处： 《电子学报》 1995年第12期47-51,共5页

摘　　要： 本文分析室内无线多径衰落信道中网格编码调制的直扩多址（ＤＳ／ＳＳＭＡ）通信系统的性能。系统采用网格编码多相调制技术以改善系统性能。本文讨论了网格编码技术与系统性能之间的关系及载波恢复相位误差对系统性能的影响．本文给出了误码率的理论分析结果和计算机模拟结果，并与常规的未编码直扩系统性能对比。 This paper deals with the performance of the multilevel PSK spread spectrum (SS)systems with trellis coded modulation(TCM) for indoor communications. A tight upper bound of the performance,which is verified by computer simulation,is derived.The moment method based on the maximum entropy is exploited to extimate the probability density function for the multiple access interference and multipath interference. The construction criteria of TCM in indoor channel is discussed briefly. The effect of the phase error on the system performance is studied.The numerical and simulation results show that the performance of the trellis coded SS system is improved considerably over that of the conventional uncoded SS system.

关 键 词： 网格编码调制 扩频多址 室内通信

领　　域： [电子电信] [电子电信] [电子电信] [电子电信]