论文标题
使用人工信号来减少预编码器/频道不匹配并增强实用MIMO系统的保密性
Reducing Precoder/Channel Mismatch and Enhancing Secrecy in Practical MIMO Systems Using Artificial Signals
论文作者
论文摘要
实用的多输入 - 元素输出（MIMO）系统取决于一组预定义的预制器，以提供空间多路复用增益。对预编码器的灵活性的这种局限性会影响整体性能。在这里，我们提出了一种传输方案，可以减少用户渠道和预编码器之间的不匹配的影响。该方案使用通道知识生成人工信号，该信号将预定义的预言器重新对齐到实际通道。此外，该计划可以为通信链接提供额外的保密性。使用比特纠正率（BER），误差量幅度（EVM）和保密能力评估所提出的方案的性能。结果表明，合法用户以及窃听者的退化有了显着改善。
Practical multiple-input-multiple-output (MIMO) systems depend on a predefined set of precoders to provide spatial multiplexing gain. This limitation on the flexibility of the precoders affects the overall performance. Here, we propose a transmission scheme that can reduce the effect of mismatch between users' channels and precoders. The scheme uses the channel knowledge to generate an artificial signal, which realigns the predefined precoder to the actual channel. Moreover, the scheme can provide an additional level of secrecy for the communication link. The performance of the proposed scheme is evaluated using bit-error rate (BER), error vector magnitude (EVM), and secrecy capacity. The results show a significant improvement for the legitimate user, along with a degradation for the eavesdropper.
