منابع مشابه
Antenna Selection in MIMO Cognitive Radio
Wireless users use radio frequency (RF) channels for data and message communication. The recent research reviles that the most appropriate to tackle the issues related to spectrum utilization is a function of time and space calls for dynamic access strategies that adapt to the electromagnetic environment. Cognitive radio is one such solution with the ability to sense the RF channel evaluation a...
متن کاملPerformance Evaluation of MIMO Based Spectrum Sensing in Cognitive Radio
In this paper, one of the most important aspect of the Cognitive Radio i.e. Spectrum Sensing is considered. A new technique based on Multiple Input Multiple Output (MIMO) antennas is proposed for Spectrum Sensing in Cognitive Radio. This paper shows the results which prove that the use of MIMO antennas increases the “Probability of Detection” and decreases the “Probability of Missed Detection” ...
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In this paper, a new algorithm is proposed for cooperative beamforming, power allocation and relay selection in the multiple input multiple output (MIMO) Orthogonal Frequency Division Multiple Access (OFDMA) CR systems where a pair of SU communicates with each other assisted by some single antenna relay nodes. The objective is to maximize signal to interference plus noise ratio (SINR) of SU sub...
متن کاملA Novel Approach To Energy Efficient Mimo Cognitive Radio Networks
Cognitive radio, with the capability to flexibly adapt its transmission or reception parameters, has been proposed as the means for unlicensed secondary users (SUs) to dynamically access the licensed spectrum held by primary users (PUs) in order to increase the efficiency of spectrum utilization[1]. Recently, a new paradigm termed Cooperative Cognitive Radio Networks (CCRNs) has been advocated ...
متن کاملCognitive Radio MIMO Gaussian Broadcast Channels with the Power Constraint
The cognitive radio multiple-input multiple-output Gaussian broadcast channels are studied where multiple antennas are available for both primary users and secondary users in a spectrum sharing environment, and the sum-rate capacity is also obtained under both the SUs’ transmit power constraint and interference power constraint at the primary receivers. The paper principally consists of two ste...
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ژورنال
عنوان ژورنال: IEEE Signal Processing Magazine
سال: 2008
ISSN: 1053-5888,1558-0792
DOI: 10.1109/msp.2008.929297