电讯技术2016，Vol.56Issue(6)：681-685,5.DOI:10.3969/j.issn.1001-893x.2016.06.015
一种偏移载波调幅信号的频域优选新方法
A New Optimum Seeking Method for Offset Carrier Amplitude Modulated Signals in Frequency Domain
管海清1
作者信息
- 1. 中国西南电子技术研究所，成都610036
- 折叠
摘要
Abstract
In civil aviation offset carrier communication system,multiple offset carrier amplitude modulated (AM) signals received by airborne radio interfere with each other. To address the issue,an optimum fre-quency-domain seeking method is proposed. With the proposed method,the spectrum of received signals is corrected by using energy centrobaric method,and the AM component with maximum carrier-to-noise ratio is selected by searching the maximum amplitude of the spectrum,whereas the other offset carrier AM sig-nals are suppressed. Both computer simulation and radio communication test show that multiple offset carri-er AM signals can be selected and demodulated accurately. Meanwhile,the interference is reduced and the mean opinion score(MOS) of demodulated voice is increased by 3. This method is valuable in practical en-gineering application.关键词
民航地空通信/偏移载波/快速傅里叶变换/能量重心法/频谱校正/优选方法Key words
civil aviation surface-to-air communication/offset carrier/fast Fourier transform/energy centrobaric method/spectrum correction/optimum seeking method分类
信息技术与安全科学引用本文复制引用
管海清..一种偏移载波调幅信号的频域优选新方法[J].电讯技术,2016,56(6):681-685,5.
