Date Added: Jan 2011
Cognitive radio systems can utilize dispersed spectrum, and thus such approach is known as dispersed spectrum cognitive radio systems. In this paper, the authors first provide the performance analysis of such systems over fading channels. They derive the average symbol error probability of dispersed spectrum cognitive radio systems for two cases, where the channel for each frequency diversity band experiences independent and dependent Nakagami-m fading. In addition, the derivation is extended to include the effects of modulation type and order by considering M-ary Phase-Shift Keying (M-PSK) and M-ary Quadrature Amplitude Modulation MQAM) schemes.