FAST ADAPTIVE TIME DOMAIN HYBRID EQUALIZERS FOR TIME REVERSAL-SPACE TIME BLOCK CODE SYSTEMS

摘要

A fast adaptive time domain hybrid equalizer for a TR-STBC(Time Reversal-Space Time Block Code) system is provided to reduce a gradient noise related to a stochastic gradient-based algorithm such as an LMS(Least Mean Square) and NLMS(Normalized Least Mean Square) by applying an additional limitation for an equalizer using secondary static information. A fast adaptive time domain hybrid equalizer for a TR-STBC system includes a first SISO DFE(Single-Input Single-Output Decision Feedback Equalizer)(402a), and a second SISO DFE(402b). The first SISO DFE receives and processes a first output stream from a TR-STBC decoder. The second SISO DFE receives and processes a second output stream from the TR-STBC decoder. The first SISO DFE and the second SISO DFE share error information. The first output stream and the second output stream have common secondary static information. The first SISO DFE and the second SISO DFE have the same tap weight using the secondary static information.