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| 快衰落信道条件下无线中继系统波束形成方案 |
| 樊娜,张健,张驭龙,姚清 |
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| (解放军理工大学 通信工程学院,南京 210007;中国电子设备系统工程公司研究所,北京 100141;北京市应用气象中心研究所,北京 100029;中国电子设备系统工程公司,北京 100079) |
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| 摘要: |
| 随着设备小型化的发展趋势,天线间距较小,信道具有相关性；且假设发射端处于高速移动状态,无法获得完全信道状态信息,只能根据部分信道状态信息设计发射端波束形成方案。针对发射端和接收端配置多天线的固定增益放大转发无线中继系统,以最大化接收端信噪比为准则，设计了基于部分信道状态信息的波束形成方案,推导了系统中断概率和平均误符号率的闭合表达式,通过仿真验证了性能分析的有效性和所设计方案的优越性。在平均误符号率为10-2、相关系数为0.8时,所提方案比反馈信道状态信息的方案节约1.6 dB的信噪比。 |
| 关键词: 无线中继系统 快衰落信道 放大转发 波束形成 部分信道状态信息 |
| DOI： |
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| 基金项目: |
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| Beamforming of amplify and forward relay networks over fast fading channels |
| FAN Na,ZHANG Jian,ZHANG Yulong,YAO Qing |
| () |
| Abstract: |
| With the miniaturization trend of equipment,the space between antennas is limited,thus the channels are correlated. Suppose the transmitter is in high speed moving,the full channel state information(CSI) is unavailable,the beamforming(BF) design is based on the partial CSI.For a dual-hop fixed-gain amplify and forward(AF)relay network,where the source and destination are each equipped with multiple antennas,the optimal BF weights are designed to maximize the received signal-to-noise ratio(SNR) based on the partial CSI and then the outage probability(OP) and average symbol error rate(ASER) in a closed-form are derived. Simulations demonstrate the correctness of performance analysis and superiority of the proposed scheme.When ASER=10-2 and correlation coefficient=0.8,1.6 dB SNR is saved with the proposed scheme. |
| Key words: wireless relay system fast fading channel amplify and forward beamforming partial channel state information |
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