Yun, Xiang, Lv, Tiejun, Gong, Ping, Su, Xinghui and Yang, Shaoshi
Approximate minimum BER power allocation for MIMO-THP system.
At 4th IEEE/ACM International Wireless Communications and Mobile Computing Conference (IEEE/ACM IWCMC 2008), Crete, GR,
06 - 08 Aug 2008.
This paper proposes a transmit power allocation (TPA) scheme based on multiple-input multiple-output (MIMO) Tomlinson-Harashima precoding (THP) structure, where a TPA matrix is introduced to the conventional MIMO-THP. We analyze the influence of the introduced TPA matrix on the performance of MIMO-THP. The proposed TPA scheme invokes the minimum average uncoded bit-error rate (BER) criterion subjected to a sum-power constraint. During the derivation, we consider the effects of precoding loss factor on the TPA scheme and obtain a closed-form expression of the TPA. Compared to existing TPA methods for MIMO-THP systems, the proposed scheme reduces processing complexity and improves the BER performance.
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