Title :
Bounds on the expected optimal channel assignment in Rayleigh channels
Author :
Naparstek, Oshri ; Leshem, Amir
Author_Institution :
Sch. of Eng., Bar-Ilan Univ., Ramat-Gan, Israel
Abstract :
The channel assignment problem is highly important to OFDMA cognitive radio systems. Tight bounds on the optimal channel assignment are crucial for the performance evaluation of various channel assignment schemes. In this paper we derive the mean of the maximal sum rate channel assignment for i.i.d Rayleigh fading channels. We provide upper and lower bounds on the expected optimal assignment. We then show that the bounds are asymptotically tight in both high SNR and as the number of users increases.
Keywords :
OFDM modulation; Rayleigh channels; cognitive radio; frequency division multiple access; performance evaluation; OFDMA cognitive radio systems; Rayleigh fading channels; SNR; expected optimal channel assignment; maximal sum rate channel assignment; orthogonal frequency division multiple access systems; performance evaluation; Approximation methods; OFDM; Rayleigh channels; Resource management; Signal to noise ratio;
Conference_Titel :
Signal Processing Advances in Wireless Communications (SPAWC), 2012 IEEE 13th International Workshop on
Conference_Location :
Cesme
Print_ISBN :
978-1-4673-0970-7
DOI :
10.1109/SPAWC.2012.6292913
