Comprehensive Analysis of Quantization Effects on Digital-Controlled Adaptive Self-Interference Cancellation System

被引：3

作者：

Xing, Jinling ^{[1
]}

Ge, Songhu ^{[1
]}

Liu, Yongcai ^{[1
]}

Cui, Zhongpu ^{[1
]}

Meng, Jin ^{[1
]}

机构：

[1] Naval Univ Engn, Natl Key Lab Sci & Technol Vessel Integrated Powe, Wuhan 430033, Peoples R China

来源：

IEEE ACCESS | 2020年 / 8卷

基金：

中国国家自然科学基金;

关键词：

Interference cancellation; Quantization (signal); Receivers; Adaptive systems; Electromagnetic compatibility; Modulation; adaptive; self-interference; quantization; ADC; DAC; OPTIMAL-DESIGN;

D O I：

10.1109/ACCESS.2020.2989001

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A digital-controlled adaptive self-interference cancellation system with capabilities of high interference cancellation ratio and strong environmental applicability is presented. The key part - analog-to-digital converter (ADC) / digital-to-analog converter (DAC) quantization effect, is analysed comprehensively. Specially, the analytical relation between the quantization noise and the interference cancellation ratio is derived, which can provide important guidance for system implementation and performance optimization. The theoretical deductions are validated firstly by Simulink simulation and then by practical experimental measurements. Both the analysis and experiments show that the system stability and convergence property are not affected by ADC/DAC. The magnification of the conditioning circuit in front of the error-sampled ADC plays an important role in the cancellation ratio improvement. The practical space channel measurements presented an average interference cancellation ratio of 59 dB for the single-tone interference waveform and 50 dB for the amplitude-modulated (AM) interference waveform, rendering the system as a powerful tool for solving the in-band self-interference problem.

引用

页码：75772 / 75784

页数：13

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