APPARATUS AND METHOD FOR ITERATIVE DETECTION AND DECODING IN MIMO WIRELESS COMMUNICATION SYSTEM

摘要

An apparatus and a method for IDD(Iterative Detection and Decoding) in a multi-antenna communication system are provided to improve decoding performance with a small number of iteration times by updating a list using the supplemental information delivered to a MIMO(Multiple Input Multiple Output) detector from a decoder, in the case of using an IDD scheme in a MIMO communication system. An IDD receiver in a MIMO communication system comprises a MIMO detection part(402), a decoder(408), a hard decision part(413), and a list updating part(401). The MIMO detection part(402) generates the soft decision values of coded bits using a list composed of an Rx vector, prior information from the decoder(408), and candidate code symbol vectors. The decoder(408) executes SISO(Soft-Input/Soft-Output) decoding for the soft decision values, generated from the MIMO detection part(402), using prior information and generates the soft decision values of coded bits. The hard decision part(413) carries out hard decision for the soft decision values outputted from the decoder(408) and generates code symbol vectors. The list updating part(401) creates a list of candidate code symbol vectors using the Rx vector at the first iteration and provides it to the MIMO detection part(402). At the next iterations, the list updating part(401) updates the list using the code symbol vectors outputted from the hard decision part(413) and provides the updated list to the MIMO detection part(402).