Abstract
The authors present the asymptotic bit error rate (BER) performance analysis of a system, over a Rayleigh fading channel that is based on the combination of low density parity check (LDPC)-based space–time (ST) codes and multi-carrier code division multiple access (MC-CDMA) techniques. MC-CDMA systems have the benefits of both orthogonal frequency division multiplexing (OFDM) and CDMA techniques in fading channels. Additionally, the LDPC-based ST codes not only increase the capacity of the system by using MIMO techniques, but also increase the coding gain owing to the use of powerful LDPC codes. First, the downlink of the MC-CDMA system with MIMO channel is analysed, and then the LDPC is applied to the results to complete the analysis. The simulation results are also compared with those previously obtained using turbo codes instead of the LDPC codes.
Published Version
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