现代电子技术2018，Vol.41Issue(3)：36-40,5.DOI:10.16652/j.issn.1004-373x.2018.03.009
近地轨道飞行器载波多普勒频偏估计新方法
New method of carrier Doppler-shift estimation for LEO aircraft
摘要
Abstract
For the communication link between the low earth orbit(LEO)aircraft and satellite,the relative movement be-tween the signal receiving and transmitting ends may cause the high-dynamic Doppler-shift of the carrier. The long-distance trans-mission of signal makes the signal weak,and reduces the signal-to-noise ratio(SNR)greatly. In order to improve the SNR and accuracy of the Doppler-shift estimation in high-dynamic environment,an estimation method based on multiple accumulation cy-cles is proposed to improve the detection probability of the Doppler-shift. The multiple accumulation cycles of the signal are used in the method to shorten the frequency section of spectrum-peak detection in the next accumulation cycle,and improve the performance of Doppler estimation. The theoretical analysis and simulation results show that,in comparison with the available methods,the proposed method can improve the detection probability,and reduce the estimation error.关键词
近地轨道飞行器/多普勒频偏/低信噪比/累积周期/检测概率/估计误差Key words
LEO aircraft/Doppler-shift/low SNR/accumulation cycle/detection probability/estimation error分类
信息技术与安全科学引用本文复制引用
张兆辉,张太华..近地轨道飞行器载波多普勒频偏估计新方法[J].现代电子技术,2018,41(3):36-40,5.基金项目
国家自然科学基金(71161006) Project Supported by Natural Science Foundation of China(71161006) （71161006）
