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In this paper, we investigate the linear processing at either base station or relay station in cellular network with a non-regenerative MIMO relay assisting. The purpose of linear processing is to equalize the two-hop fading channel in order to support multiuser transmission in downlink and uplink. Under the transmit power constraint at each station, the closed-form expressions of the suboptimal MMSE...
Power management and energy-awareness has become popular in mobile computing as well as mobile communications. In future wireless communication systems, the energy efficiency of terminals and base stations has to be improved. Therefore, we propose a new utility function which is the difference of the capacity and a weighted power cost term. Next, the utility region for single-antenna and multi-antenna...
It is well known that carrier frequency offsets caused by inaccuracies of local oscillators between transmitter and receiver stations destroy the orthogonality among OFDM subcarriers and induce additional intercarrier interference. In conjunction with MIMO transmission where different users interfere with each other, this effect strongly degrades the signal detection performance if it is not compensated...
This paper deals with the sum-rate performance in the broadcasting channel of a decentralized multiuser multi-antenna system. With the assumption of limited channel state information available at the base station and a large number of single antenna decentralized users in a cell, we propose a Semi-orthogonal precoding method with a total feedback rate constraint, and analyze its the sum-rate performance...
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