Analysis of Quantization Effects on Digital-Analog Mixed Adaptive Interference Cancellation System

作者:Xing Jinling*; Meng Jin; Ge Songhu; Tang Jian; Jie Gouchuan
来源:Joint 60th IEEE International Symposium on Electromagnetic Compatibility (EMC) / IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (APEMC), 2018-05-14 to 2018-05-18.

摘要

Adaptive interference cancellation is an effective solution to enable full-duplex wireless communication in the multi antenna co-site shipboard environments. The paper presents a digital-analog mixed cancellation system, proposes a Simulink model and focuses on the ADC/DAC quantization effect analysis. We find that increasing the amplification factor of the ADC front-end circuits can reduce significantly the ADC precision requirement to obtain the high interference suppression, i.e. only 12-bit ADC can support 90.88 dB interference suppression. The experiment results show above 64 dB interference suppression in the whole 2 MHz - 30 MHz frequency range is achieved, rendering a promising candidate for the co-site wireless communications.