Adaptive robust beamformer formulti-pair two-way relay networks with imperfect channel state information
Adaptive robust beamformer formulti-pair two-way relay networks with imperfect channel state information
复制标题
具有不完善信道状态信息的多对双向中继网络的自适应鲁棒波束形成器
DOI：
10.1631/fitee.1500134
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发表时间：
2016-03
影响因子：
3
通讯作者：
Jun Li
中科院分区：
文献类型：
--
作者：
Jin Wang;Feng Shu;Riqing Chen;Yudi Cui;Yu Chen;Jun Li
在宽带多对双向中继网络中，中继站波束赋形的性能与可用信道状态信息的准确性密切相关。CSI的准确度由多普勒扩展、波束成形和信道估计之间的延迟以及导频符号的密度（包括导频符号的发射功率）确定。高斯-马尔可夫CSI误差模型的系数被建模为CSI延迟、多普勒扩展和信噪比的函数，并且可以在真实的时间中被估计。根据误差模型系数的实时估计，提出了一种RS处的自适应鲁棒最大信干噪比（Max-SINR）+最大信漏噪比（Max-SLNR）波束形成器，用于跟踪CSI误差的变化。仿真结果和分析表明：与现有的非自适应波束形成器相比，该自适应波束形成器具有更好的鲁棒性和更好的误比特率性能;随着发射导频符号密度的增加，其误比特率和和速率性能逐渐接近理想信道状态下的Max-SINR + Max-SLNR波束形成器。
In wideband multi-pair two-way relay networks, the performance of beamforming at a relay station (RS) is intimately related to the accuracy of the channel state information (CSI) available. The accuracy of CSI is determined by Doppler spread, delay between beamforming and channel estimation, and density of pilot symbols, including transmit power of pilot symbols. The coefficient of the Gaussian-Markov CSI error model is modeled as a function of CSI delay, Doppler spread, and signal-to-noise ratio, and can be estimated in real time. In accordance with the real-time estimated coefficients of the error model, an adaptive robust maximum signal-to-interferenceand- noise ratio (Max-SINR) plus maximum signal-to-leakage-and-noise ratio (Max-SLNR) beamformer at an RS is proposed to track the variation of the CSI error. From simulation results and analysis, it is shown that: compared to existing non-adaptive beamformers, the proposed adaptive beamformer is more robust and performs much better in the sense of bit error rate (BER); with increase in the density of transmit pilot symbols, its BER and sum-rate performances tend to those of the beamformer of Max-SINR plus Max-SLNR with ideal CSI.
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DOI：
10.1109/icc.2010.5502396
发表时间：
2010-05
期刊：
2010 IEEE International Conference on Communications
影响因子：
--
作者：
E. Yilmaz;R. Zakhour;D. Gesbert;R. Knopp
通讯作者：
E. Yilmaz;R. Zakhour;D. Gesbert;R. Knopp
DOI：
10.1109/glocom.2002.1188045
发表时间：
2002-11
期刊：
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
影响因子：
--
作者：
J. N. Laneman;G. Wornell
通讯作者：
J. N. Laneman;G. Wornell
影响因子：
16.4
作者：
Rankov, Boris;Wittneben, Armin
通讯作者：
Wittneben, Armin
影响因子：
16.4
作者：
Zhang, Rui;Liang, Ying-Chang;Cui, Shuguang
通讯作者：
Cui, Shuguang
用于具有放大转发中继策略的多对双向中继网络的高和速率波束形成器
影响因子：
8.8
作者：
JianXin Wang;Mao Wang;WeiXing Sheng;Qian Chen
通讯作者：
Qian Chen