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Research on Synchronization and Acquisition Algorithm for IR-UWB in Multipath Channels

Author: ZhangBeiRong
Tutor: XieHong
School: Harbin Engineering University
Course: Communication and Information System
Keywords: UWB Multipath channel Synchronous capture Second-order method MAX / TC
CLC: TN925
Type: Master's thesis
Year: 2010
Downloads: 39
Quote: 0
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Abstract


UWB ( IR - UWB ) wireless communication technology has the advantages of high transmission speed, system capacity, high positioning accuracy, the ability of anti-multipath , has become a hot research in the field of short distance wireless communication . However, due to the ultra- wideband signal pulse duration is short , the power limit , and dense multipath channel having a characteristic , the reception signal how accurately synchronized to become one of the difficulties . The subject on the multi-path channel IR - UWB synchronization acquisition algorithm - depth and comprehensive study . First introduces the research background and significance of the IR - UWB communication , analysis of IR - UWB communication channel model , the signal model and system receiver , then discusses the various existing IR - UWB communication system synchronization capture technology , found that the main study direction is designed to capture a short time, low complexity and high-performance synchronization acquisition algorithm . This paper presents a synchronization acquisition algorithm based on the TH - PPM - UWB the second signal coarse acquisition program completed by the characteristics of the sequence block search algorithm as a basis for the use of binary search algorithm , a small search space achieve fine capture , simulation results show that the second capture proposed algorithm, the average acquisition time is greatly reduced in the case of appropriate increase in the hardware complexity , improve the detection efficiency , especially in the case of low signal-to-noise ratio performance improvement is particularly evident , Good actual indoor multipath channel environment , ultra-wideband signal receiver . Finally, in the MAX / TC guidelines synchronization capture the basis of principle , MAX / TC standards based DS - BPSK - UWB use of auxiliary sequence synchronization acquisition algorithm , then the capture performance of the algorithm and the average acquisition time more in-depth theoretical analysis, and finally a simulation experiment in ultra-wideband channel environment . Theoretical analysis and experimental results show that the use of an auxiliary sequence the MAX / TC guidelines synchronization acquisition algorithm does not change the basic synchronous capture performance at the same time , to a large extent reduce the PN sequence required for synchronization acquisition time .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications
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