Generally, the multiple input multiple output (MIMO) transmission has been well known as one of the most important practical technique to combat channel fading as well as enhance the channel capacity of four generation (4G) mobile communication systems. There has been active research area on designing the efficient channel codes such as turbo codes and low density parity check (LDPC) codes for MIMO fading channels. Specially, LDPC codes have great attention due to their capacity approaching

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... ormance and flexibility in code design with low implementation complexity. Basically, the LDPC codes are a class of linear block codes with implementable decoders, which provide the near capacity performance on a large set of data transmission and data storage channels. In this paper, we investigate the performance of LDPC codes for MIMO 4G mobile communications systems. Simulation results show that 2 by 2 MIMO systems provide desired bit error performance in communication systems.