摘要
M QAM是一种频谱利用率较高的调制方式 ,但是在多径环境下其性能的恶化限制了它在无线通信中的应用 .本文结合Rician衰落特性 ,提出了采用最大比合并和选择式合并以有效改善M QAM系统性能的方法 .这种方法在实际中有着广泛的应用前景 .
M QAM(Quadrature Amplitude Modulation) has a high frequency efficiency,but its quality will degrade largely under the multi path environments,thus limits its application in wireless communications.This paper proposes a way to improve the performance of M QAM in Rician fading,using maximum ratio and selective combining.It is expected that the method will gain wider use in reality.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2001年第1期36-37,共2页
Acta Electronica Sinica
