A Rapid and Reliable Two-Step Search Scheme for UWB Signal Acquisition in Multipath Channels

Jaewoon KIM
Suckchel YANG
Yoan SHIN

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E90-A    No.7    pp.1491-1495
Publication Date: 2007/07/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e90-a.7.1491
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Spread Spectrum Technologies and Applications
Keyword: 
UWB,  signal acquisition,  two-step search,  TSS-BS,  TSS-LS,  

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Summary: 
We propose the "Two-Step Search scheme with Linear search based Second step (TSS-LS)" by improving the conventional "Two-Step Search scheme with Bit reversal search based Second step (TSS-BS)" for reliable as well as rapid acquisition of Ultra Wide Band (UWB) signals in multipath channels. The proposed TSS-LS utilizes two different thresholds and search windows to achieve fast acquisition. Furthermore, unlike the TSS-BS in which the bit reversal algorithm is applied in both steps, the linear search is adopted for the second step in the proposed TSS-LS to correctly find the starting point in the range of effective delay spread of the multipath channels, and to obtain reliable bit error rate performance of the UWB systems.

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