CHANNEL EQUALIZATION METHOD AND SYSTEM BASED ON TIME-DOMAIN CHANNEL ESTIMATION

摘要

Disclosed are a channel equalization method and system based on time-domain channel estimation. The method comprises: firstly, inserting a training sequence into a transmission end signal; then, performing channel equalization of the received training sequence part on a reception end by using a filter, and updating a filter coefficient; and filtering a data signal in a time domain by using the filter updated in the previous step, so as to implement channel equalization. In the present invention, channel equalization is performed by using a training sequence and a time-domain filter. A frame structure of a training sequence part is formed by M sequences and 0 sequences in an interleave manner, which helps the time-domain filter equalize polarization crosstalk a signal meets, so as to unlock polarization multiplexing; in addition, a coefficient of the time-domain filter is updated by using an RLS algorithm, the algorithm complexity is low, computation time can be saved, the sensitivity to a modulation format is absent, and the applicability is wide.