时间反演UWB通信系统的窄带干扰抑制

doi:10.3969/j.issn.1001-506X.2020.04.28

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (4): 948-953.doi: 10.3969/j.issn.1001-506X.2020.04.28

时间反演UWB通信系统的窄带干扰抑制

史策(), 陈善学(), 李方伟()

重庆邮电大学通信与信息工程学院, 重庆 400065

收稿日期:2019-08-02 出版日期:2020-03-28 发布日期:2020-03-28
作者简介:史策(1994-),男,硕士研究生,主要研究方向为无线通信中抗干扰技术。E-mail:494814094@qq.com|陈善学(1966-),男,教授,博士,主要研究方向为高光谱图像处理、无线通信技术。E-mail:771541273@qq.com|李方伟(1960-),男,教授,博士,主要研究方向为无线通信技术。E-mail:lifw@cqupt.edu.cn
基金资助:
国家自然科学基金(61771084);重庆市研究生科研创新项目(CYS19250)

Narrow band interference suppression of time reversal UWB communication system

Ce SHI(), Shanxue CHEN(), Fangwei LI()

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2019-08-02 Online:2020-03-28 Published:2020-03-28
Supported by:
国家自然科学基金(61771084);重庆市研究生科研创新项目(CYS19250)

摘要/Abstract

摘要：

超宽带(ultra wide band, UWB)通信系统工作在3.1~10.6 GHz的频谱范围内,与现存的一些通信系统共用频谱资源。为了防止UWB通信系统对其他通信系统造成干扰,美国联邦通信委员会将UWB的室内辐射功率谱密度限制在-41.3 dBm/MHz以下,但UWB通信系统会受到其共存的窄带系统的严重干扰。针对此问题,本文在接收端设计了一种自适应无限脉冲响应陷波器,推导了-3 dB处的自适应带宽,同时结合最速下降算法,找到陷波器的最优带宽,从而抑制UWB中的窄带干扰(narrow band interference, NBI)。最后使用蒙特卡罗仿真验证出自适应陷波器有效抑制了时间反演(time reversal, TR)UWB通信系统中的NBI,提升系统误比特率(bit error rate, BER)。

关键词: 超宽带, 时间反演, 窄带干扰, 误比特率

Abstract:

Ultra wide band (UWB) communication systems work in the scope of 3.1~10.6 GHz spectrum with other pre-existing wireless systems. In order to prevent the interference of UWB communication systems to other systems, the federal communications commission regulations have set conditions that the indoor radiation power is under 41.3 dBm/MHz, but the UWB communication system will be seriously interfered by the narrowband systems. Aiming at this problem, an adaptive notch at the receiver is designd and derives the adaptive bandwidth equation at -3 dB. At the same time, the fastest descent algorithm is combined to find the optimal band width of the notch filter. Finally, simulation results show that the adaptive notch reduces the narrow band interference (NBI) in time reversal (TR) UWB communication system and improves the bit error rate (BER).

Key words: ultra wide band (UWB), time reversal, narrow band interference (NBI), bit error rate (BER)

中图分类号:

TN911.4

史策, 陈善学, 李方伟. 时间反演UWB通信系统的窄带干扰抑制[J]. 系统工程与电子技术, 2020, 42(4): 948-953.

Ce SHI, Shanxue CHEN, Fangwei LI. Narrow band interference suppression of time reversal UWB communication system[J]. Systems Engineering and Electronics, 2020, 42(4): 948-953.

图/表 6

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CM3	数值
Λ(1/ns)	0.067 7
λ(1/ns)	2.1
Γ	14
γ	7.9
σ₁	3.394 1
σ₂	3.394 1
σ_x	3

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时间反演UWB通信系统的窄带干扰抑制

Narrow band interference suppression of time reversal UWB communication system

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