Throughput Performance Analysis of Cooperative Spectrum Sensing Network with Improved Energy Detectors in Hoyt Fading Environment

In this work, a cooptative spectrum sensing network (CSSN) for improved energy detection (IED) based CR nodes is proposed. All the CR nodes are equipped with number of antennas and perform themselves selection diversity (SC) techniques. Each CR node senses a PU through erroneous channels (sensing) and reports its sensing data (one-bit decision) to fusion center (FC) through erroneous channels. In FC, the global decision on the status of PU is made with the help of k-out-of-N fusion scheme. The expression for detection probability over noise plus Hoyt fading channels are derived and the mathematical framework for analysis of throughput of proposed network is developed. The simulation results is also presented to validate the analytically obtained performance characteristics. For several network parameters values, the investigation on comparison between IED and traditional energy detection method for different decision fusion rules is discussed. Further, performance curves are analytically illustrated for throughput over noise plus Hoyt fading channel. The impact of diversity technique and effect of fading severity parameters on the throughput is also investigated. The effect of channel error on total error performance for both proposed and conventional networks is shown. Finally, optimal network parameters values correspond to maximum throughput are also identified.