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Multiuser Precoding and Power Allocation with Sum Rate Matching for Full-duplex MIMO Relay  

Lee, Jong-Ho (공주대학교 전기전자제어공학부)
Shin, Oh-Soon (숭실대학교 정보통신전자공학)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.12C, 2010 , pp. 1020-1028 More about this Journal
Abstract
Relay has attracted great attention due to its inherent capability to extend the service coverage and combat shadowing in next generation mobile communication systems. So far, most relay technologies have been developed under the half-duplex (HD) constraint that prevents relays from transmitting and receiving at the same time. Although half-duplex relay (HDR) is easy to implement, it requires partitioning of resource for transmission and reception, reducing the whole system capacity. In this paper, we propose a multinser precoding and power control scheme with sum rate matching for a full-duplex (FD) multiple-input multiple-output (MIMO) relay. Full-duplex relay (FDR) can overcome the drawback of HDR by transmitting and receiving on the same frequency at the same time, while it is crucial to reduce the effect of self-interference that is caused by its own transmitter to its own receiver. The proposed precoding scheme cancels the self-interference of the FDR as well as to support multiuser MIMO. Moreover, we suggest a power allocation scheme for FD MIMO relay with the constraint that the sum rate of the relay's received data streams is equal to that of the relay's transmit data streams.
Keywords
full-duplex relay; decode-and-forward; multiuser MIMO; precoding; power allocation;
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