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A Rapid Signal Acquisition Scheme for Noncoherent UWB Systems  

Kim Jae-Woon (숭실대학교 정보통신전자공학부)
Yang Suck-Chel (숭실대학교 정보통신전자공학부)
Choi Sung-Soo (한국전기연구원 전기정보망기술연구그룹)
Shin Yo-An (숭실대학교 정보통신전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.4C, 2006 , pp. 331-340 More about this Journal
Abstract
In this Paper, we propose to extend the TSS-LS(Two-Step Search scheme with Linear search based Second step) scheme which was already proposed by the authors for coherent UWB(Ultra Wide Band) systems, to rapid and reliable acquisition of noncoherent UWB systems in multipath channels. The proposed noncoherent TSS-LS employing simple energy window banks utilizes two different thresholds and search windows to achieve fast acquisition. Furthermore, the linear search is adopted for the second step in the proposed scheme to correctly find the starting point in the range of effective delay spread of the multipath channels, and to obtain reliable BER(Bit Error Rate) performance of the noncoherent UWB systems. Simulation results with multipath channel models by IEEE 802.15.3a show that the proposed two-step search scheme can achieve significant reduction of the required mean acquisition time as compared to general search schemes. ]n addition, the proposed scheme achieves quite good BER performance for large signal-to-noise ratios, which is favorably comparable to the case of ideal perfect timing.
Keywords
UWB; noncoherent receiver; multipath channel; signal acquisition; energy window bank; linear search; bit reversal search; two-step search; TSS-BS; TSS-LS;
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