554 | 11 | 11 |
下载次数 | 被引频次 | 阅读次数 |
为削弱LEO卫星信道的时间选择性衰落,提出了一种多普勒频移估计与补偿方法。基于差分相关检测器,从中频信号提取下行信号中的多普勒频移信息,然后利用A/D和DSP进行相应地采集与处理。用得到的多普勒频移估计实时调节接收机本振频率,实现对下行信号的多普勒频移补偿,同时计算出上行多普勒频移并进行补偿。该方法无需符号同步,特别适合于超过符号速率的多普勒频移估计。
Abstract:[1] Tarokh V, Seshadri N, Calderbank A R. Space - Time Codes for High Data Rate Wireless Communication: Performance Criterion and Code Construction [ J ]. IEEE Trans. on IT, 1998, 44(2): 744-764.
[2] Quinn B G, Estimating Frequency by Interpolating Using Fourier Coefficients [ J ]. IEEE Transactions on Signal Processing,1994, 42(5): 1264.
[3] Quinn B G, Fernandas J M. A Fast Technique for the Estimation of Frequency [ C], 1991, Biometrika, 78 (3): 489- 497.
[4] Lovell B C, Williamson R C. The Statistical Performance of Some Instantaneous Frequency Estimators [J]. IEEE Trans. on Signal Processing, 1992, 40(7) : 1708-1723.
[5] Ali I, Al - Dhahir N, Hershey J. Doppler Characterization for LEO Satellites [ J ]. IEEE Trans. on Communications, 1998, 46(3): 309-312.
基本信息:
DOI:
中图分类号:TN927.2
引用信息:
[1]韩力,蔚保国,郭石小羽,罗伟雄.LEO卫星信道多普勒频移估计与补偿[J].无线电工程,2005(10):6-7+29.
基金信息: