基于制导多级搜索的接收机多天线耦合抵消

I. Arambasic, F. Quiros, I. Raos
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引用次数: 0

摘要

为了实现更高的比特率和增益多样性,通信行业的最新趋势包括在发送端和接收端使用多天线。与此同时,终端越来越小,增加了内部电子干扰的水平。在这篇文章中,分析了被称为射频前端天线耦合的信号失真。天线间的耦合用三阶非线性行为的多项式来建模。提出了在模数转换器输出端安装非线性软件解耦模块来消除耦合。在模块内部,用9次多项式逼近非线性逆耦合函数来实现信号增强。利用引导多级搜索逼近法求逆函数。在不同的系统条件下对所提出的耦合抵消算法进行了分析,结果表明该算法具有良好的耦合抵消特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Receiver's Multi-Antenna Coupling Cancellation Based on Guided Multi-level Search
In order to achieve higher bit rates and gain diversity, recent trends in communication industry include the use of multiple antennas in transmitter and at the receiver. At the same time the terminals are getting smaller incrementing the level of electronic interferences in their interior. In this contribution, the signal distortion known as RF front-end antenna coupling is analyzed. The coupling between antennas is modeled with polynomials limited to third order nonlinear behavior. Nonlinear software decoupling module, located at the output of analog-to-digital (AD) converter, is proposed for coupling cancellation. Inside the module, signal enhancement is achieved with the approximation of inverse nonlinear coupling function with the polynomial of 9th degree. The inverse function is obtained using guided multilevel search approximation method. The proposed coupling cancellation algorithm is analyzed under different system conditions showing excellent coupling cancellation characteristics.
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