A study on turbo equalization for MIMO system based on LDPC codes

In this paper, MIMO (Multiple-Input-Multiple Output) system based on turbo equalization techniques which LDPC (Low Density Parity Check) codes were outer code and STTC (Space Time Trellis Code) were employed as an inner code are studied. LDPC may be applied these system, it must make BCJR output be hard decision data. It caused performance degraded. This paper proposed turbo equalization model for LDPC codes able to apply MIMO system combined with STTC codes. By the simulation results, we confirmed performance of proposed turbo equalization model was improved about 2.5 dB than that of turbo codes and about 11.5dB than that of conventional LDPC codes.

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