Title :
Approximate Minimum BER Power Allocation for MIMO-THP System
Author :
Yun, Xiang ; Lv, Tiejun ; Gong, Ping ; Su, Xinghui ; Yang, Shaoshi
Author_Institution :
Dept. of Inf. Eng., Beijing Univ. of Posts & Telecommun. (BUPT) Beijing, Beijing
Abstract :
This paper proposes a transmit power allocation (TPA) scheme based on multiple-input multiple-output (MIMO) Tomlinson-Harashima preceding (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 preceding 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.
Keywords :
MIMO communication; error statistics; MIMO-THP system; TPA matrix; bit error rate; minimum BER power allocation; multiple-input multiple-output Tomlinson-Harashima preceding structure; sum-power constraint; transmit power allocation; uncoded bit-error rate criterion; Bit error rate; Channel capacity; Closed-form solution; Decision feedback equalizers; Filters; MIMO; Power engineering and energy; Propagation losses; Receiving antennas; Transmitters;
Conference_Titel :
Wireless Communications and Mobile Computing Conference, 2008. IWCMC '08. International
Conference_Location :
Crete Island
Print_ISBN :
978-1-4244-2201-2
Electronic_ISBN :
978-1-4244-2202-9
DOI :
10.1109/IWCMC.2008.153
