Spectral Efficiency of OFDMA Cognitive Radios under Imperfect Cross-Link Knowledge

Autor:	Saki, H., Shikh-Bahaei, M.
Rok vydání:	2017
Předmět:	Computer Science - Information Theory
Druh dokumentu:	Working Paper
Popis:	We analyze the spectral efficiency performance and limits of orthogonal frequency-division multiple access (OFDMA) cognitive radios (CRs) with an imperfect availability of cross-link knowledge. In particular, in contrast to the conventional `average' and `worst' cases of channel estimation error in the literature, we propose a stochastic approach to mitigate the total imposed interference on primary users. Channel-adaptive resource allocation algorithms are incorporated to optimize the cognitive system functionality under transmit and interference power constraints. An expression for the cumulative density function (cdf) of the received signal-to-interference-plus-noise ratio (SINR) is developed to evaluate the average spectral efficiency. Analytical derivations and results are confirmed through computer simulations. Comment: arXiv admin note: substantial text overlap with arXiv:1709.04248
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1710.08277 Zobrazit plný text záznamu View this record from Arxiv