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One precoding algorithm used in the downlink of CR MU-MIMO system is presented. Though interference between CUs is not mitigated completely, co-channel interference to PU is pre-whitened and various performance evaluation results demonstrate that algorithm CR-TR-BD accommodates for more general case and is able to achieve high sum rate throughput than BD only used in CR network.
This paper focuses on pre-coding schemes for the downlink of multiple user multi-input multi-output (MU-MIMO) system in cognitive radio (CR) network. The spectrum band can be utilized by allowing a number of cognitive users to coexist with primary users (PUs) through a pre-coding scheme. The capacity problems maximize the sum rate of CUs subject to the interference constraint for PUs and total transmitted...
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