Cramer-Rao bounds and its Application in Synchronization of DS-UWB

doi:10.13190/jbupt.200705.28.chenj

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (5): 28-32.doi: 10.13190/jbupt.200705.28.chenj

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Cramer-Rao bounds and its Application in Synchronization of DS-UWB

CHEN Jun, ZHOU Zheng

(School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)

Received:2006-12-01 Revised:2007-02-28 Online:2007-10-30 Published:2007-10-30
Contact: CHEN Jun

Abstract

Abstract:

Synchronization process is much complicated and essential in Ultra-Wide band (UWB) communication system for its special characteristics, extremely short transmitted pulse shape and ultra dense multi-path interference. A close-form expression of Modified Cramer-Rao bounds (MCRBs) for DS-UWB both in data-aided (DA) and non-data aided (NDA) acquisition scheme is derived. IEEE defined standard channel models are adopted in the presents of multi-access interference (MAI) during derivation. The validity of this derivation result is also confirmed by comparing this derived limit of theoretical performance and classical sliding correlation acquisition algorithm with computer simulation in fixed observation window. Meanwhile, a conclusion is obtained that the derivation under prior assumptions is a feasible tight lower bounds and the increase of multi-path delay in environment weakens the estimation performance of timing delay.

Key words: synchronization, Ultra-Wide band, DS, Cramer-Rao bounds, IEEE standard UWB channel models

CLC Number:

TN914.3

CHEN Jun, ZHOU Zheng. Cramer-Rao bounds and its Application in Synchronization of DS-UWB[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(5): 28-32.

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Cramer-Rao bounds and its Application in Synchronization of DS-UWB

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