Optimal Whitening Approach Based Multiuser Detection in Fixed Wireless Communication Networks

This paper exploits the Angle of Arrival (AoA) information for improving Bit Error Rate (BER) performance of fixed wireless communications, which is more predominant in wireless sensor networks. In the proposed approach, the steering vector corresponding to the AoA is used as the signature vector and the signals arriving at other directions are considered as interference for single user environment. The closed form analytical expression has been derived for BER. In a multiuser environment, orthogonal multiuser receiver is used with the steering vectors corresponding to the AoAs of the active users. Further, the concept of optimal whitening is applied to improve BER performance of the fixed wireless communication system. Performance of the proposed receiver is analyzed in Additive White Gaussian Noise and Rayleigh fading environments.