扩频码快速捕获的瞬时相关谱估计法
Realization of fast acquisition optimum receiver by instant correlation spectral estimation
-
摘要: 该文提出了一种低信噪比大多普勒频移条件下扩频码快速捕获的方法,该方法依据回波信号与本地扩频码瞬时相关谱上的显著峰值的存在性判决信号的存在性,与前人的方法相比,该方法在简化了系统复杂性的同时保持了并行多通道最优接收机的性能。Abstract: This paper presents a new method of fast code acquisition under low SNR, and large Doppler shift condition. The method gives decision base on the peak existence in the spectral of instant correlation between the local code and the zero-IF received signal. This scheme not only promises a performance as good as that of parallel channel optimum receiver but also has a much simpler structure.
-
王飞雪,直接序列扩频信号的全数字式快速捕获,[博士论文],国防科技大学,1998,11.[2]王飞雪,郭桂榕,二相编码信号分段相关-视频积累检测的最优中频积累时间,国防科技大学学报,1999,21(1),71-75.[3]刘有恒,信号检测与估计,北京,人民邮电出版社,1989,150-153.[4]程玉平,赵普福,m-序列编码连续波信号的Doppler补偿,电子学报,1993,21(6),40 45[5]朱近康,扩展频谱通信及其应用,合肥,中国科技大学出版社,1993,1,118-129.[6]Bede Liu, Fred Mintzer, Calculation of narrow band spectra by direct decimation, IEEE Trans.on ASSP, 1978, ASSP-26(6), 529-534.
计量
- 文章访问数: 2090
- HTML全文浏览量: 84
- PDF下载量: 420
- 被引次数: 0