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信道的时变特性会影响单载波频域均衡(SC-FDE)系统的性能。对时变导致的干扰进行了理论分析,并在此基础上,参考正交频分复用(OFDM)系统中载波间干扰的消除方法,提出了单载波频域均衡系统中干扰自消除、时域加窗和分段均衡等抑制信道时变干扰的方法。分析和仿真表明,这几种方法都能有效地抑制信道时变导致的干扰。但是干扰自消除和时域加窗方法需要重复传送相同的信息,效率有所下降;而分段均衡方法增加分段数目,在提高系统性能的同时也增加了接收复杂度。
The time-varying nature of the channel can affect the performance of a single carrier frequency domain equalization (SC-FDE) system. On the basis of this, the interference self-cancellation in single-carrier frequency-domain equalization system is proposed by referring to the elimination method of inter-carrier interference in orthogonal frequency division multiplexing (OFDM) system. Domain windowing and segmentation equalization and other methods to suppress the time-varying interference of the channel. Analysis and simulation show that these methods can effectively suppress the interference caused by channel time-varying. However, the interference self-cancellation and time-domain windowing method need to transmit the same information repeatedly, and the efficiency decreases. However, the segmentation equalization method increases the number of segments and increases the receiving complexity while improving the system performance.