International Journal of Emerging Technology and Advanced Engineering (IJETAE)
Cognitive Networks are an emerging new type of networking technology that can utilize both Radio Spectrum and Wireless Station. Based on the Knowledge of the availability of such resources gathered from past experience the resources can be utilized efficiently. Signaling is the major issue in Cognitive Network. Multiple Input Multiple Output (MIMO) technique is used for the transmission of signals in Cognitive Network. In this paper, the performance of MIMO in a Rayleigh fading environment is analyzed and water filling algorithm is used to maximize the capacity of MIMO channels.