fading characteristics meaning in English

衰落特性

The propagation characteristics of underwater acoustic channels and their influences on long - range information transmission are studied thoroughly . based on the sonar equation , the optimal frequency band is abtained . from the calculation about transmission loss , the source level is forecasted . based on the random time varying channel theory , the fading characteristics of long - range underwater acoustic channels are analyzed
系统、深入地研究了水声信道特性及其对水声远程信息传输系统的影响；从声纳方程出发，确定了系统的最佳工作频段；在声传播损失计算的基础上，给出了声源级的预报；基于时变信道理论，描述了远程水声信道的衰落特性。
The simulation results based on siso and mimo systems show that the proposed scheme could effectively eliminate the time - variant fading characteristics of wireless channel and under an acceptable demand of ber , the frequency efficiency is enhanced greatly and besides , dynamic encoding is implemented with low complexity and high efficiency
通过在单天线和多天线系统中的仿真,表明该方案可以有效的克服无线信道的时变衰落特性,在满足误码率性能要求的基础上可以提高系统频谱利用率,且实现复杂度低。