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Study on the MIMO OFDM Systems with Adaptive Bit and Power Allocation |
Li Hai-tao①; Zhang Jing②; Lu Jian-hua① |
①Department of Electronic Eng.,Tsinghua University Beijing 100084 China;②Academy of Electronics and Information Technology China Electronics Technology Group Corportion Beijing 100041 |
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Abstract The multiple antenna Orthogonal Frequency Division Multiplexing(OFDM) system model is analyzed in this paper. Considering that Multiple-Input Multiple-Output(MIMO) channel can be separated into parallel subchannels by means of the singular value decomposition, and deep faded subcarriers may degrade the OFDM system perfor mance, the adaptive bit and power allocation for MIMO OFDM system are proposed. The analysis and simulation results show that the proposed adaptive MIMO OFDM improves bit error rate performance and spectral efficiency of the system.
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Received: 22 October 2002
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