基于抵消技术的邻道干扰抑制

doi:10.3969/j.issn.1001-506X.2019.11.26

Systems Engineering and Electronics ›› 2019, Vol. 41 ›› Issue (11): 2611-2618.doi: 10.3969/j.issn.1001-506X.2019.11.26

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Adjacent channel interference suppression based on cancellation technology

HUO Xiaolei1,2, ZHAO Hongzhi1, LIU Ying1, CUI Peizhang2, QUAN Houde2, TANG Youxi1

1. National Key Lab of Science and Technology on Communications, University of Electronic Science and
Technology of China, Chengdu 611731, China; 2. Department of Electronic and Optical Engineering,
Shijiazhuang Campus of Army Engineering University, Shijiazhuang 050003, China

Online:2019-10-30 Published:2019-11-05

Abstract

Abstract: 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.

Key words: adjacent channel interference, nonlinear distortion, parameter estimation, interference suppression

HUO Xiaolei, ZHAO Hongzhi, LIU Ying, CUI Peizhang, QUAN Houde, TANG Youxi. Adjacent channel interference suppression based on cancellation technology[J]. Systems Engineering and Electronics, 2019, 41(11): 2611-2618.

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Adjacent channel interference suppression based on cancellation technology

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