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Multiple input multiple output techniques combined with orthogonal frequency division multiplexing (MIMO-OFDM) provide a promising approach for wireless systems. However, a serious drawback of the OFDM system is the high peak-to-average power ratio (PAPR), which may severely affect the power efficiency of RF power amplifiers. In this paper, we propose a simple method to reduce the PAPR of MIMO-OFDM...
Orthogonal frequency division multiplexing based multiple input multiple output techniques (MIMO-OFDM) tend to achieve high data rate transmission targets for 4G wireless communication systems. However, due to its inherent drawback of high peak-to-average power ratio (PAPR), the OFDM based transmission may severely affect the power efficiency of RF power amplifiers. In this paper, we propose a simple...
In this paper, the sum rate issue of a multiple-input multiple-output (MIMO) relay broadcast channel is studied, where the fixed relay station is used to support multiuser transmission in a downlink channel. With appropriate design, the sum rate can be expressed as a function of the processing units at the base station (BS) and relay, and the power allocation can be converted to a standard convex...
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