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Volume 32 Issue 4
Dec.  2010
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Article Contents
Guofan ZHAO, Lun TANG, Yanjuan HU, Peipei ZHAO, Qianbin CHEN. A Reliability-aware 5G Network Slice Reconfiguration and Embedding Algorithm[J]. Journal of Electronics & Information Technology, 2020, 42(6): 1478-1485. doi: 10.11999/JEIT190500
Citation: Guan Lu, Tang You-xi, Shao Shi-hai, Deng Kai. Optimal Transmit Power Allocation for Asynchronous V-BLAST System Using Zero-Forcing Detecting[J]. Journal of Electronics & Information Technology, 2010, 32(4): 786-789. doi: 10.3724/SP.J.1146.2009.00509

Optimal Transmit Power Allocation for Asynchronous V-BLAST System Using Zero-Forcing Detecting

doi: 10.3724/SP.J.1146.2009.00509
  • Received Date: 2009-04-10
  • Rev Recd Date: 2009-11-23
  • Publish Date: 2010-04-19
  • Since different delay offsets are applied to the spatially multiplexed data streams of asynchronous vertical Bell Labs layered space-time (V-BLAST), the symbol-by-symbol power allocation method used in synchronous systems is invalid. According to this issue, a block-by-block power allocation algorithm is proposed to minimize the Block Average Bit Error Rate (BABER). This algorithm firstly computes the instantaneous SNR per symbol. Then BABER of asynchronous block is worked out. Finally, the optimum transmit power of each antennas is obtained from the solution of an optimization problem. Simulation results in flat Rayleigh fading channel show that the proposed algorithm has 2 dB gain at BER of 10-3 compared to the 2Tx2Rx asynchronous V-BLAST using BPSK modulation and zero-forcing detection.
  • Foschini G J. Layered space-time architecture for wirelesscommunication in a fading environment when usingmulti-element antennas [J].Bell Labs Technical Journal.1996,1(2):41-59[2]倪兴, 王晓湘, 杜娟.一种新的基于噪声预测的部分判决反馈MIMO 接收算法[J].电子与信息学报.2008, 30(1):52-54浏览[3]Zhang R and Cioffi J M. Approaching MIMO-OFDMcapacity with zero-forcing V-BLAST decoding and optimizedpower, rate, and antenna-mapping feedback [J].IEEETransaction on Signal Processing.2008, 56(10):5191-5203[4]Shao S H, Tang Y X, and Kong T. Performance analysis of amodified V-BLAST system with delay offsets usingzero-forcing detection [J]. IEEE Transactions on VehicularTechnology, 2007, 56(6): 3827-3837.[5]Demirkol M F and Ingram M A. Power-controlled capacityfor interfering MIMO links [C]. IEEE Vehicular TechnologyConference, Atlanta, GA, USA, Oct.7-11, 2001: 187-191.Chung S T, Lozano A, and Howard H C. Approachingeigenmode BLAST channel capacity using V-BLAST withrate and power feedback [C]. IEEE Vehicular TechnologyConference, Atlanta, GA, USA, Oct.7-11, 2001: 915-919.[6]Hwang K J and Lee K B. Transmit power allocation withsmall feedback overhead for a multiple antenna system [C].IEEE Vehicular Technology Conference, Vancouver, BC,Canada, Sep. 24-28, 2002: 2158-2162.[7]Nam S H, Shin O S, and Lee K B. Transmit power allocationfor a modified V-BLAST system [J].IEEE Transactions onCommunications.2004, 52(7):1074-1079[8]唐万斌, 张亮, 李少谦. V-BLAST 系统中采用发射功率分配的MMSE 迭代软干扰抵消算法[J].电子与信息学报.2006,28(9):1640-1644浏览[9]Wang N and Blostein S D. Approximate minimum BERpower allocation for MIMO spatial multiplexing systems [J].IEEE Transactions on Communications.2007, 55(1):180-187[10]Proakis J G. Digital Communications [M]. New York:McGrawHill, 2001: 266-267.[11]Zhou S and Giannakis G B. Adaptive modulation formulti-antenna transmissions with channel mean feedback [C].IEEE International Conference on Communications,Anchorage, AK, USA, May 11-15, 2003: 2281-2285.[12]郑咸义. 计算方法[M]. 广州: 华南理工出版社, 2005:100-103.Zheng Jian-yi. Computational Methods [M]. Guangzhou:Publishing house of Huanan Science and EngineeringUniversity, 2005: 100-103.
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