Multiuser MIMO Transmission Aided by Massive One-Bit Magnitude Measurements
Multiuser MIMO Transmission Aided by Massive One-Bit Magnitude Measurements
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DOI：
10.1109/twc.2016.2596718
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发表时间：
2016-10
影响因子：
10.4
通讯作者：
Shengchu Wang;Lin Zhang;Yunzhou Li;Jing Wang;E. Oki
中科院分区：
文献类型：
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作者：
Shengchu Wang;Lin Zhang;Yunzhou Li;Jing Wang;E. Oki
本文提出了一种具有完整测量和一位幅度观测的多用户 MIMO 系统，这些系统分别通过多个线性同相正交 (IQ) 结构射频 (RF) 链和大规模一位包络链获得。由于添加的一位包络链具有低功耗和低成本，因此总电路功耗和成本没有显着增加。通过共享IQ结构的RF链并执行信道校准操作来获取一位包络链上的信道侧信息。基于半定松弛（SDR）和近似消息传递（AMP）构建了两个多用户检测器。一位幅度在 SDR 检测器中被解释为不等式约束，并由 AMP 检测器以贝叶斯方式利用。仿真结果表明，一位幅度测量带来了较高的MIMO复用和分集增益，并降低了发射功率。随着信道相干时间的增加，容易配备更多的一位包络链，并且一位幅度辅助MIMO比传统MIMO变得越来越高效的频谱和能量效率。
This paper proposes a multiuser MIMO system with both full measurements and one-bit magnitude observations, which are acquired by several linear inphase-and-quadrature (IQ) structured radio frequency (RF) chains and massive one-bit envelope chains, respectively. The total circuit power and cost are not increased significantly, since the added one-bit envelope chains have low power and low cost. Channel side information on the one-bit envelope chains is acquired by sharing the IQ-structured RF chains and executing a channel calibration operation. Two multiuser detectors are constructed based on the semidefinite relaxation (SDR) and approximate message passing (AMP). The one-bit magnitudes are interpreted as inequality constraints in the SDR detector, and exploited in a Bayesian manner by the AMP detector. Simulation results show that the one-bit magnitude measurements bring about high MIMO multiplexing and diversity gains, and decrease the transmission power. With the increase of the channel coherence time, more one-bit envelope chains are prone to be equipped, and one-bit magnitude-aided MIMO becomes more and more spectral-and-energy-efficient than the conventional MIMO.