Design of LDPC-coded MIMO systems via a large-system approach

Abstract

Making use of the extrinsic information transfer (EXIT) chart code design tool and the large-system performance analysis technique, we develop an efficient approach to construct low-density parity-check (LDPC) codes for multiple-input multiple-output (MIMO) systems. In the proposed approach, we eliminate the time-consuming procedure of numerically evaluating the EXIT curves of the MIMO detectors, which makes capacity-achieving LDPC code design possible for large-scale MIMO systems. In addition, we demonstrate that redesigning LDPC code is very helpful only when the I/O ratio of a MIMO system varies.