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http://dx.doi.org/10.5515/KJKIEES.2009.20.5.493

Performance of Initial Timing Acquisition in the DS-UWB Systems with Different Transmit Pulse Shaping Filters  

Kang, Kyu-Min (Spectrum Engineering Research Team, ETRI)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.20, no.5, 2009 , pp. 493-502 More about this Journal
Abstract
In this paper, we compare the performance of initial timing acquisition in direct sequence ultra-wideband(DS-UWB) systems with different transmit pulse shaping filters through extensive computer simulations. Simulation results show that the timing acquisition performance of the DS-UWB system, whose chip rate is 1.32 Gchip/s, employing a rectangular transmit filter is similar to that employing a square root raised cosine(SRRC) filter with an interpolation factor of 4 in the realistic UWB channels(CM1 and CM3) as well as the additive white Gaussian noise(AWGN) channel. Additionally, we present both a 24-parallel digital correlator structure and a 24-parallel processing searcher operating at a 55 MHz system clock, and then briefly discuss the initial timing acquisition procedure. Because we can adopt an 1.32 Gsample/s digital-to-analog(D/A) converter and an 1.32 Gsample/s analog-to-digital(AID) converter in the DS-UWB system by employing the rectangular transmit filter, we have a realistic solution for the DS-UWB chipset development.
Keywords
DS-UWB; Timing Acquisition; SRRC Filter; Rectangular Filter; Parallel Processing; Searcher; Correlator;
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  • Reference
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