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Research on Channel Shortening Algorithm Used in UWB Communication System

Author: WangRui
Tutor: ChenLiJia
School: Harbin Institute of Technology
Course: Communication and Information System
Keywords: Ultra-Wideband Balanced Truncated channel RAKE
CLC: TN925
Type: Master's thesis
Year: 2008
Downloads: 6
Quote: 0
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Abstract


Ultra-wideband wireless communication technology is more advanced wireless communication technology . It solves the problems of traditional short-range wireless communications technology over the years did not solve the problem, such as fading , high rate of system complexity , high cost and power consumption issues . It does not require additional spectrum , can be used with other wireless communication systems coexist in the same band . The main contents of this paper is the channel truncation algorithm, a total of two channel truncation algorithm , namely, the maximum SNR truncation method (MSSNR), improved maximum SNR truncation method (Modifed MSSNR) method . This algorithm is truncated channel RAKE receiver by reducing the number of correlators to reduce the complexity of the RAKE receiver . UWB communication to overcome the multi -path phenomenon , reducing multipath delay spread and reduce the error rate of UWB communication system to improve the performance of the receiver energy capture . This paper describes the application of the algorithm causes truncated channel , channel truncated algorithm mathematical principles and implementation process. Applications are binary TH-PPM UWB signal , the application of the provisions of the SV research group IEEE802.15.SG.3a channel model . Truncated by two channel simulation algorithm , we know that the application of the maximum SNR truncated method (MSSNR) , the channel energy is concentrated in the first few channel trail , followed the path of the energy has been significantly inhibition . The same number of correlators in the application of a RAKE receiver algorithm truncated after channel bit error rate (BER) to a certain degree of reduction . The general approach is by increasing the number of correlators to reduce the error rate , so that the bit error rate while maintaining the same premise , the application of the channel after truncation algorithm , RAKE receiver correlator reduces the number , complexity is reduced , the channel multipath delay spread has also been inhibited . Application of the improved maximum signal to noise ratio truncated (Modified MSSNR) method after the error rate has been further reduced. RAKE can further reduce the number of correlators , the receiver has improved energy capture .

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