Analytical Methods for Performance Evaluations of Adaptive Modulation and Coding in Cognitive Radio Systems That Employ Distance Statistics

摘要

Distance statistics have been employed in previous investigations of packet transmission and reception in cognitive radio systems. Such statistics are a good source of control information for packet-to-packet adaptation of modulation and coding to mitigate the effects of time-varying fading or interference. Previous research on distance statistics has relied on simulation for protocol design and performance evaluation. We devise new analytical methods for use in the design and evaluation of protocols for adaptive modulation and coding that obtain control information from a distance statistic. The primary advantage of our approach is the avoidance of simulations of the time-varying channel, generation of the adaptive control information, and adaptation process.