Abstract
WiMAX technology supports very high data rate, high capacity and high quality in mobile broadband wireless access system. The performance of the WiMAX system can be enhanced by incorporating a better channel coding technique. This paper presents the excellent performance channel coding known as low-density parity check (LDPC) codes which is a part of WiMAX system. A modified array code parity check matrix for LDPC encoder is used and the message passing (MP) algorithm for LDPC decoder is used, respectively. Both systems are modulated by the basic standard modulation scheme. The computer simulation results confirm that the bit error rate (BER) performance of the WiMAX system that incorporate with the powerful LDPC coding technique has been improved over the conventional standard WiMAX system. However, the computational complexity of the proposed WiMAX system is higher than the previous one.
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