Simulation shows co-channel interference and maximum multi-path delay spread have significant impact on the BER performance and PDMRC gives the best performance in most common environment.
仿真表明同信道干扰与最大多径延迟扩展对系统性能影响很大，在通常情况下采用PDMRC具有最好的性能。
In this paper, we analyze the BER performance of pilot symbol assisted two-dimensional spread spectrum systems with coherent demodulation in multi-path fading channels.
在多径衰落信道中，本文分析了导引辅助的二维扩频相干解调的误码率性能。
The wireless propagation environment is described first: analyzing the small-scaled fading, including amplitude fading, multi-path time delay and Doppler spectrum spread.
在本论文中，首先对移动传播环境作了描述，特别是对小尺度多径传播造成的幅度衰落，多径时延和多普勒频移进行了分析；
Their main problem is the transmission will be the accumulation of noise and distortion from the spread of multi-path waves will decline would adversely affect the quality of audio transmission.
他们的主要问题是传输过程中会产生噪声和失真的积累，由电波多径传播会产生衰落，会严重影响音频的传输质量。
Their main problem is the transmission will be the accumulation of noise and distortion from the spread of multi-path waves will decline would adversely affect the quality of audio transmission.
他们的主要问题是传输过程中会产生噪声和失真的积累，由电波多径传播会产生衰落，会严重影响音频的传输质量。
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