Performance comparison of WRAN over AWGN & RICIAN channel using BPSK & QPSK Modulation with convolution coding

The spectrum available for the wireless services is limited, the increased demand of wireless application has put a lot of constraints on the utilization of available radio spectrum. For the efficient spectrum utilization for wireless application IEEE 802.22 standard i.e. WRAN (Wireless Regional Area Network) is developed which is based on cognitive radio technique that senses the free available spectrum. It allows sharing of geographically unused channels allocated to the TV Broadcast Service, without interference. In this paper we are evaluating the performance of WRAN over physical layer By using BPSK & QPSK modulation and obtaining the BER curves. Simulation is performed in MATLAB. The performance of Transmission mode are evaluated by calculating Probability of Bit error rate(BER) versus SNR over AWGN & RICIAN fading Channel.