空军工程大学学报（自然科学版）2017，Vol.18Issue(5)：86-91,6.DOI:10.3969/j.issn.1009-3516.2017.05.015
信号相关性对正交2 FS K全双工系统的影响及抑制
Influence and Suppression of Signals Correlation on Full-Duplex Orthogonal 2 FSK Systems
摘要
Abstract
On the basis of 2FSK digital modulation full-duplex systems, the paper finds that technical effect of applying conventional adaptive cancellation is not optimal .Aimed at this problem,the adaptive cancellation performance is identified .In order to analyze correlation property of 2FSK from a theoretical point of view,the paper constructs a full-duplex orthogonal 2FSK systems based on the RF domain self-in-terference cancellation structure based on the minimum mean square error (MMSE) criterion,which can confirm the influence of signal correlation on the acceptance of Bit Error Rate (BER) .Based on the proper-ties of generalized cyclic stationary stochastic processes,the paper derives the relations between signals correlation and BER . Then, the paper inhibits the impact of relevance in the White Gaussian Noise (AWGN) by an effective method .The result shows that the correlation coefficient ρof the 2FSK signal is the linear sum of the symbol waveform correlation coefficients of the two frequencies .The range of the correlation coefficient is 0 ~ 0. 5 .After the signal of 2FSK is removed by self-interference,the error per-formance deteriorates with the increase of correlation coefficient ρ.关键词
全双工/正交二进制频移键控/相关性/误码率Key words
full-duplex/orthogonal binary frequency shift keyboard/correlation/bit error rate (BER)分类
信息技术与安全科学引用本文复制引用
邹亚州,向新,张婧怡,刘炜,张少华..信号相关性对正交2 FS K全双工系统的影响及抑制[J].空军工程大学学报（自然科学版）,2017,18(5):86-91,6.基金项目
陕西省自然科学基金(2014JM2—6106) （2014JM2—6106）
