莱斯衰落信道中混合FDMA/CDMA性能分析

分析混合频分多址／码分多址系统在莱斯多径衰落信道的性能，并与占据相同带宽的宽带ＣＤＭＡ系统进行比较。系统采用二进制ＤＰＳＫ调制和瑞克接收机。结果表明，直达 径分量较强或信噪比较大时，混合系统的性能优于宽带ＣＤＭＡ系统，否则，宽带ＣＤＭＡ系统最优。

Performance Analysis of Hybrid FDMA/CDMA in Rician Fading

In this paper, a hybrid frequency division multiple access/code division multiple access (FDMA/CDMA) system in a Rician fading channel is analysed. The performance of the hybrid system is compared with a wideband CDMA system, which occupies the same total bandwidth. The results show that for DPSK modulation with a RAKE receiver, a hybrid system can have a greater capacity with a strong direct path component or a high signal to noise ratio (SNR). Otherwise, a wideband system remains optimal.