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给出了一种可以用于高速数字接收的特殊的判决反馈均衡器结构。为减少FIR内多径传播影响到IIR内的多径响应,而将部分IIR提前于FIR,以得到更快的系数收敛速度。在此基础上的数据仿真,比较了提前结构同普通结构的性能差异,验证了该结构可以使均衡器在严重畸变的信道条件下得到更快的收敛速度。最后,介绍了提前结构在最新的高清晰度电视8VSB接收机中的应用。
A special decision feedback equalizer structure that can be used for high speed digital reception is given. To reduce multipath propagation within the FIR affecting multipath response within the IIR, part of the IIR is advanced to the FIR for faster coefficient convergence. On the basis of this, the data simulation is compared with the performance difference of the advanced structure with that of the normal structure. It is verified that this structure can make the equalizer get faster convergence under the channel condition of serious distortion. Finally, the application of advance structure in the latest HDTV 8VSB receiver is introduced.