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In this paper, we consider the resource allocation problem in a Cognitive Radio (CR) downlink system employing both Orthogonal Frequency Division Multiple Access (OFDMA) and Multiple-Input Multiple-Output (MIMO) technologies. We aim at maximizing the total cognitive system throughput subject to the interference power constraint at the Primary Receiver (PR), the total transmission power constraint...
In this paper, we propose an approach of multi-antenna spectrum sensing based on cyclostationarity for cognitive radio. The key idea of the proposed method is to extend Dandawate's generalized likelihood ratio test to take into account the estimation of all cyclic cross-correlation as well as all cyclic autocorrelation obtainable in a multi-antenna system. The proposed method is able to take advantage...
Many communication signals exhibit cyclostation-arity with some cycle frequencies and the cycle frequencies are related to signal parameters such as symbol rates or carrier frequencies. Dandawate proposed an asymptotically optimal chi-square statistical test to check the presence of cyclostationarity. In the last few years, the statistical test has been applied to spectrum sensing for cognitive radios...
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