Seed accumulating sequential estimation for PN Sequence acquisition at low signal-to-noise ratio

Authors:
Seokho Yoon;Iickho Song;Sun Yong Kim
Affiliations:
Maxwell Dworkin Hall, Room 111, Harvard University, 33 Oxford Street, Cambridge, MA;Maxwell Dworkin Hall, Room 111, Harvard University, 33 Oxford Street, Cambridge, MA;Department of Electronic Engineering, Konkuk University, 1 Hwayang Dong, Gwangjin Gu, Seoul 149-701, South Korea
Venue:
Signal Processing - Image and Video Coding beyond Standards
Year:
2002

Citing 2
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EURASIP Journal on Applied Signal Processing

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Abstract

The sequential estimation (SE) proposed by Ward for rapid acquisition of pseudo-noise (PN) sequences performs well only at moderate chip signal-to-noise ratios (SNRs). In this paper, a seed accumulating sequential estimation (SASE) method based on accumulated seeds of the received PN sequence is proposed, which performs well at low chip SNR also. The mean acquisition time performance of the SASE method is investigated. Numerical results show that the SASE performs dramatically better than the SE at low chip SNR and the improvement becomes larger as the period of PN sequence increases.