Low Density Signature Based Packet Access with Phase Only Adaptive Precoding
Low Density Signature Based Packet Access with Phase Only Adaptive Precoding
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DOI：
10.1109/vtcspring.2019.8746451
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
S. Denno;Ryoko Sasaki;Yafei Hou
中科院分区：
文献类型：
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作者：
S. Denno;Ryoko Sasaki;Yafei Hou
本文提出了仅使用相位自适应预编码的低密度签名数据包访问。提出的访问允许多个用户终端同时发送其数据包，尽管仅将一个天线放在终端和访问点上，以增加网络吞吐量。所提出的相位仅适应性预码通过旋转传输信号阶段来改善传输性能。本文提出了一个定义最佳旋转角度的标准，以及实际两种估计角度的技术。当6个数据包在4个时间插槽中传输时，提出的自适应预编码在单个输入单输出的RICIAN褪色通道中，在BER的BER上获得了4DB的增益，即过载比为1.5。
This paper proposes a low density signature-based packet access with phase only adaptive precoding. The proposed access allows multiple user terminals to send their packets simultaneously though only one antenna is put on terminals and on an access point, in order to increase network throughput. The proposed phase only adaptive precoding improves the transmission performance by rotating the transmission signal phase. This paper proposes a criterion that defines the optimum rotation angle, and actual two techniques to estimate the angle. When 6 packets are transmitted in 4 time slots, the proposed adaptive precoding attains about a gain of 4dB at the BER of 10^{-4} in a single input single output Rician fading channel, i.e., overloading ratio is 1.5.