BER Improvement of BPSK, QPSK and GMSK in Rayleigh fading channel
Atul Gautam Atul Gautam, Kumar Saurabh, Маниша Шарма · 2014
In this paper BER performance of communication system with using different modulation techniques i.e. BPSK, QPSK and GMSK in Rayleigh Fading Channel is enhanced by using LPDC encoder. Low density parity check (LDPC) codes are one of the best error correcting codes in today’s coding world and are known to approach the Shannon limit. As with all other channel coding schemes, LDPC codes add redundancy to the uncoded input data to make it more immune to channel impairments. The choice of digital modulation scheme will significantly affect the characteristics and performance and resulting physical realization of a communication system. In order to choose the most suitable modulation have several criteria such as power efficiency and bandwidth efficiency and bit error rate are used for evaluation. We have describes the new combined method that consists of a cooperative approach of several different algorithms for improve the performance of system i.e. reducing BER.