基于抵消技术的邻道干扰抑制

针对无线设备间的邻道干扰,提出了一种干扰抑制方法。在接收机中设计邻道干扰重建支路,利用记忆多项式估计信道的非线性参数,构建邻道干扰信号模型并重建干扰信号,最终从接收信号中消除邻道干扰信号。所提方法能够有效减小邻道干扰影响,提升期望信号接收信噪比,使有限带宽内容纳更多通信设备。计算机仿真与软件无线电平台实验结果表明,在实验室视距环境中,甚高频频段,信号带宽25 kHz,所提方法能够抑制18 dB的邻道干扰,为有限空间内无线电设备间邻道干扰抑制提供了新的研究思路。

Adjacent channel interference suppression based on cancellation technology

To alleviate adjacent channel interference (ACI) between wireless devices, a suppression method is proposed in this paper. An auxiliary chain is deployed to reconstruct the interference signal, and memory polynomial is used to estimate the nonlinear parameters. Eventually the interference signal is reconstructed and subtracted from the received signal. The proposed method can effectively alleviate the ACI and improve the signal-to-noise ratio of the desired signal. It can also accommodate more equipment within limited bandwidth. The simulation and experimental results show that under the conditions of laboratory line of sight environment, the carrier is in the very high frequency band, the signal bandwidth is 25 kHz, and the proposed method can suppress 18 dB ACI. It provides a new method for ACI suppression between radio devices in finite space.