高动态接收机的多普勒频偏捕获新算法

doi:10.3969/j.issn.1001-2400.2015.02.002

J4 ›› 2015, Vol. 42 ›› Issue (2): 7-12+51.doi: 10.3969/j.issn.1001-2400.2015.02.002

高动态接收机的多普勒频偏捕获新算法

张兆维;李文刚;周彦果;张海林

(西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071)

收稿日期:2013-11-29 出版日期:2015-04-20 发布日期:2015-04-14
通讯作者: 张兆维
作者简介:张兆维(1987-)，男，西安电子科技大学博士研究生，E-mail: zwzhang@mail.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(61201136，61301169，61371127)；国家科技重大专项基金资助项目(2012ZX03003012)；国家111计划资助项目(B08038)；西电-昆山创新研究院基金资助项目；西电-宁波信息技术研究院基金资助项目；中央高校基本科研业务经费资助项目(K5051301029)

New Doppler frequency-shift acquisition algorithm for high dynamic receivers

ZHANG Zhaowei;LI Wengang;ZHOU Yanguo;ZHANG Hailin

(State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071, China)

Received:2013-11-29 Online:2015-04-20 Published:2015-04-14
Contact: ZHANG Zhaowei

摘要/Abstract

摘要：

为了解决高动态接收机长时间信号累积导致的能量扩散问题，提出一种基于迭代搜索范围校正的多普勒频偏捕获新算法．根据接收信号连续性特点，首先，单次校正算法利用前两个累积周期内的估计结果来校正第3个累积周期内估计结果的搜索范围，并分析了搜索范围大小对捕获概率的影响; 然后，迭代校正算法采用一种多个单次校正级联的方式来逐步缩小多普勒搜索范围，从而进一步提高多普勒捕获性能并得到捕获概率的上界值．仿真计算结果表明，该算法可以通过校正搜索范围来提高多普勒捕获概率．

关键词: 高动态接收机, 多普勒捕获, 能量扩散, 搜索范围

Abstract:

To address the energy dispersion problem caused by the long time signal combination for high dynamic receivers, a new Doppler shift acquisition algorithm based on the iterative searching range correction (SRC) is proposed. Considering the received signal's continuity property, first, the single SRC algorithm uses the two Doppler estimation results obtained in the previous two combination periods to correct the third combination period's searching range for the third estimation result and analyzes the influence of the searching range's size on acquisition probability, and then, iterative SRC algorithm adopts cascaded multiple single SRCs to gradually narrow the Doppler searching range, thus increasing the Doppler acquisition performance furthermore with an upper bound on the acquisition probability with the iterations. Effectiveness of this proposed algorithm is verified by simulation results.

Key words: high dynamic receiver, Doppler acquisition, energy dispersion, search range

张兆维;李文刚;周彦果;张海林 . 高动态接收机的多普勒频偏捕获新算法[J]. J4, 2015, 42(2): 7-12+51.

ZHANG Zhaowei;LI Wengang;ZHOU Yanguo;ZHANG Hailin . New Doppler frequency-shift acquisition algorithm for high dynamic receivers[J]. J4, 2015, 42(2): 7-12+51.

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高动态接收机的多普勒频偏捕获新算法

New Doppler frequency-shift acquisition algorithm for high dynamic receivers

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