Performance Analysis of Cooperative Underlay Cognitive Networks with Channel Estimation Error
Channel information (CI) plays an important role in system design optimization. It is obtained through channel estimation process and hence, inevitably imperfect at a certain degree. Numerical evaluation of the outage performance of cooperative underlay cognitive networks under the presence of channel estimation error has been left open. This paper heals this literature gap with the proposal of a precise outage probability expression. Various results show the excellent match between analysis and simulation, and the advantage of the derived expression in studying the effect of CI imperfection on system performance.
underlay channel estimation error cognitive radio cooperative communications