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

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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 E-mail:zwzhang@mail.xidian.edu.cn

Abstract

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

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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New Doppler frequency-shift acquisition algorithm for high dynamic receivers

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