The main aim of the paper is to analyze the BER performance of RS and BCH code in the presence of AWGN channel with QPSK modulation technique at different code rate. The paper analyses the implementation of BCH/RS codes with interleaver, which increases the capability of the correcting errors in the system, thus increases the system performance. An interleaver is added to the system so that use of an interleaver improves the error rate of the communication system in which channel produces the burst error. As Eb /NO increases BER decrease in system (Digital Video Broadcasting – Satellite Second Generation). By using interleaver with BCH or RS codes there is decrease in BER and thus improvement in the performance of the system Index Terms- AWGN Channel, BCH, Block Interleaver, buffering, LDPC and RS Codes.
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