Minimum BER Bit Allocations for MIMO Spatial Multiplexing Systems

Che Xiao-lin; He Chen; Jiang Ling-ge; Xiong Yong

doi:10.3724/SP.J.1146.2006.01487

Volume 30 Issue 4

Dec. 2010

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Article Navigation > Journal of Electronics & Information Technology > 2008 > 30(4): 784-787

Che Xiao-lin, He Chen, Jiang Ling-ge, Xiong Yong. Minimum BER Bit Allocations for MIMO Spatial Multiplexing Systems[J]. Journal of Electronics & Information Technology, 2008, 30(4): 784-787. doi: 10.3724/SP.J.1146.2006.01487

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Che Xiao-lin, He Chen, Jiang Ling-ge, Xiong Yong. Minimum BER Bit Allocations for MIMO Spatial Multiplexing Systems[J]. Journal of Electronics & Information Technology, 2008, 30(4): 784-787. doi: 10.3724/SP.J.1146.2006.01487

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Minimum BER Bit Allocations for MIMO Spatial Multiplexing Systems

doi: 10.3724/SP.J.1146.2006.01487

Received Date: 2006-10-15
Rev Recd Date: 2007-12-06
Publish Date: 2008-04-19

Abstract

Abstract

Based on the minimum Bit Error Rate (BER) criterion, a greedy bit allocation algorithm and bisection-method based bit allocation algorithm are proposed for Multiple-Input Multiple-Output (MIMO) spatial multiplexing systems. Under the constraint of total bit rate and equal power allocation to each transmit antenna, the proposed transmit bit allocation algorithms can achieve better performance by optimizing the modulation order of each transmit antenna. The simulation results show that the proposed system can obtain significant Signal-to-Noise Ratio (SNR) gain relative to the conventional MIMO system. In addition, compared with the transmit power allocation scheme, the requirements on the dynamic range of the power amplifiers for each transmit antenna are reduced with little performance loss.

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References

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