多抽头延迟设置与幅相误差对全双工射频自干扰消除的影响

发布时间：2018-05-10 11:51

本文选题：无线通信 + 自干扰抵消　；参考：《电子与信息学报》2015年07期

【摘要】：对于多径自干扰信道场景下同时同频全双工(CCFD)无线通信系统,考虑射频域多抽头自干扰抵消技术,现有研究多集中于实验验证,缺少抽头个数与延迟设置、幅度和相位等参数对自干扰抵消性能的影响分析,不利于工程参数的选取。针对此问题,在已知抽头个数和延迟设置的情况下,该文给出各个抽头幅度和相位的求解方法,并推导了幅度和相位误差对自干扰抵消性能影响的理论表达式。分析与仿真表明,对于特定抽头个数,当最大抽头延迟小于自干扰信号主径延迟时,自干扰抵消值随着最大抽头延迟的增加而增加,而当最大抽头延迟大于约两倍自干扰信号主径延迟时,自干扰抵消值随着最大抽头延迟的增加而减少;对于特定抽头延迟范围,当抽头个数增加或自干扰信号带宽减少时,自干扰抵消值随之变大;对于特定的延迟设置,随着幅度或相位误差的增加,自干扰抵消值越来越小。
[Abstract]:For the simultaneous full duplex CCFDs wireless communication system in multi-track self-interference channel scenario, considering the multi-tap self-interference cancellation technology in RF domain, the existing researches are mostly focused on experimental verification, and lack of tap number and delay setting. The analysis of the effect of amplitude and phase on the performance of self-interference cancellation is unfavorable to the selection of engineering parameters. In order to solve this problem, under the condition that the number of tap and the setting of delay are known, the method of calculating the amplitude and phase of each tap is given, and the theoretical expression of the effect of amplitude and phase error on the performance of self-interference cancellation is derived. Analysis and simulation show that when the maximum tap delay is less than the main path delay of the self-interference signal, the self-interference cancellation value increases with the increase of the maximum tap delay. When the maximum tap delay is more than twice the main path delay of the self-interference signal, the self-interference cancellation value decreases with the increase of the maximum tap delay, and for the specific tap delay range, when the tap number increases or the self-interference signal bandwidth decreases, The self-interference cancellation value increases with the increase of amplitude or phase error, and decreases with the increase of amplitude or phase error.
【作者单位】：电子科技大学通信抗干扰技术国家级重点实验室;
【基金】：国家自然科学基金(61471108,U1035002/L05,61001087,61101034,61271164,61301154) 新一代宽带无线移动通信网国家科技重大专项(2014ZX03003001-002,2012ZX03003010-003,2011ZX03001-006-01) 863计划项目(2014AA01A704)资助课题
【分类号】：TN911.4

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