Performance Of DS-CDMA System With QAM Over AWGN Multipath Fading Channel

Communication

In this paper we review the work to amend the quality or reducing the efficacious Bit Error Rate (BER) in a multipath fading channel. Higher Signal to noise ratio implies a reduced BER and vice versa as BER is inversely proportional to SNR. The study focuses on improving the performance of digital communication system. For reliable communication, the BER should be as low as possible i.e. amelioration in BER. Rake receiver a special type of receiver consisting of multiple correlators, which multiplies the received signal by time-shifted versions of a local code sequence which increases the Signal to Noise Ratio SNR and decreases the BER. Here BER performance of AWGN and Rayleigh fading channel are compared for 16-QAM and Simulated using Gold Code as carrier for Multipath using Rake receiver also BER Performance comparison for ( QPSK, 16-QAM, 64-QAM, 256-QAM ) AWGN and Rayleigh fading channel is done. The simulation is carried out with MATLAB. BER improvement of DSCDMA system with QAM using baseband modulations for AWGN channel is discussed.

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