Efficient Feedback of the Channel Information for Closedloop Beamforming in WLAN
Efficient Feedback of the Channel Information for Closedloop Beamforming in WLAN
复制标题
WLAN闭环波束成形信道信息的有效反馈
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Aldana
中科院分区：
文献类型：
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作者：
Joonsuk Kim;C. Aldana
采用多个天线的无线系统可以在发射机处使用波束成形技术来增强性能，其中波束成形系数通常基于每个数据包传输的信道信息。这可能需要来自接收器的具有信道信息的安全反馈信道。为了减少网络开销并跟踪衰落环境中的信道变化，必须有一种有效的方法来以少量比特传递此信息。我们研究了一种使用吉文斯旋转的有效反馈机制，与传统的量化方法相比，该机制可分解波束成形矩阵，并将 WLAN 系统中反馈信息的开销减少多达 75%
Wireless system employing multiple antennas can enhance the performance using beamforming techniques at the transmitter, where beamforming coefficients are often based on channel information for each packet transmission. This may require a secure feedback channel from the receiver with the channel information. In order to reduce the network overhead as well as to track the channel variations in fading environments, it is necessary to have an efficient way to deliver this information with a small number of bits. We investigate an efficient feedback mechanism using Givens rotation that decomposes the beamforming matrix and reduces the overhead of feedback information by as much as 75% in WLAN system when compared with conventional quantization methods