利用人工信号减小预编码器/信道失配和增强实用MIMO系统的保密性
Reducing Precoder/Channel Mismatch and Enhancing Secrecy in Practical MIMO Systems Using Artificial Signals
摘要：
实际的多输入多输出（MIMO）系统依赖于预编码器的预定义集合来提供空间复用增益。对预编码器的灵活性的这种限制影响整体性能。在这里，我们提出了一种传输方案，可以减少用户的信道和预编码器之间的失配的影响。该方案使用信道知识来生成人工信号，其将预定义的预编码器重新对准到实际信道。此外，该方案可以为通信链路提供额外的保密级别。所提出的方案的性能进行评估，使用误比特率（BER），误差矢量幅度（EVM），和保密容量。结果表明，一个显着的改善，合法用户，随着降级的窃听。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
