DVB-C接收机中均衡的一种实现方法

An Implement of Equalizer in DVB-C Receiver

针对DVB-C信号的特点,接收机中自适应均衡器采用的是分数间隔判决反馈均衡器的结构,与改进的CMA盲均衡算法和自适应算法DDLMS相结合。在仿真中,在有线多径信道条件下,此均衡器能较好地消除多径干扰,具有较好的性能,而不需要任何的训练序列和导频的存在。

A design of adaptive equalizer to be appropriate for DVB - C receiver system is shown in this paper. This adaptive equalizer in receiver with the fractionally-spaced DFE structure uses the adapted CMA algorithms and DDLMS algorithms. In simulation, under the condition that the multi-path given by cable channel exists in the input, the channel can be adaptively equalized by means of this design without the need of sequence training or pilot frequencies to eliminate ISI.