论文标题
基于测量的Z3RO预编码器的验证以防止大型MIMO系统中的非线性放大器失真
Measurement-Based Validation of Z3RO Precoder to Prevent Nonlinear Amplifier Distortion in Massive MIMO Systems
论文作者
论文摘要
在多个输入多重输出（MIMO）系统中，预编码允许基站在空间上进行焦点和对每个用户的多重信号。但是，使用传统的预言器（例如最大比率传输（MRT））时，由功率放大器非线性引入的失真会在相同的空间方向上相互结合。这可以很大程度上限制用户性能，此外，创建未经授权的外带（OOB）排放。为了克服这个问题，最近引入了零三阶失真（Z3RO）预言器。此预言器将用户位置的三阶失真约束为零。在这项工作中，基于现实世界的通道测量数据对Z3RO预编码器的性能进行验证。结果说明了UE位置的失真功率的降低：在最差的单用户方案中，平均失真降低了6.03 dB，在2用户情况下，以-3 dB的速度降低了3.54 dB。
In multiple input multiple output (MIMO) systems, precoding allows the base station to spatially focus and multiplex signals towards each user. However, distortion introduced by power amplifier nonlinearities coherently combines in the same spatial directions when using a conventional precoder such as maximum ratio transmission (MRT). This can strongly limit the user performance and moreover create unauthorized out-of-band (OOB) emissions. In order to overcome this problem, the zero third-order distortion (Z3RO) precoder was recently introduced. This precoder constraints the third-order distortion at the user location to be zero. In this work, the performance of the Z3RO precoder is validated based on real-world channel measurement data. The results illustrate the reduction in distortion power at the UE locations: an average distortion reduction of 6.03 dB in the worst-case single-user scenario and 3.54 dB in the 2-user case at a back-off rate of -3 dB.
