NDLI: Design of high-speed preamble searcher for RACH preamble structure in WCDMA reverse link receiver

Content Provider	IEEE Xplore Digital Library
Author	Eun-Sun Jung Joo-Hyun Do Yung-Yong Lee Hyung-Jin Choi
Copyright Year	2004
Description	Author affiliation: Dept. of Inf. & Commun. Eng., Sung Kyun Kwan Univ., Seoul, South Korea (Eun-Sun Jung; Joo-Hyun Do)
Abstract	In this paper, we propose a high speed preamble searcher adequate for RACH (random access channel) preamble structure in WCDMA reverse link receiver. Unlike IS-95, WCDMA system uses AISMA (acquisition indication sense multiple access) scheme. Because of the time limit between RACH preamble transmission and AI (acquisition indicators) and the restriction on the number of RACH signatures assigned to RACH preamble, fast acquisition indication is required for efficient operation. The preamble searcher proposed in this paper is based on 2-antenna system and has adopted FHT (fast Hadamard transform) algorithm that has the radix-2 16 point FFT (fast Fourier transform) structure. The acquisition speed using FHT is 32 times faster than the conventional method that correlates each signature. Based on this fast aquisition scheme, we improved the acquisition performance by calculating correlation up to the 4096 chips of the total preamble length. The performance is analyzed by using Neyman-Pearson method. The proposed algorithm has been applied for the implementation of the WCDMA reverse link receiver modem successfully.
Sponsorship	IEEE Region 10
Starting Page	481
Ending Page	484
File Size	1947430
Page Count	4
File Format	PDF
ISBN	0780385608
DOI	10.1109/TENCON.2004.1414637
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-24
Publisher Place	Thailand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Timing Fourier transforms Channel capacity Base stations Research and development Performance analysis Modems Interference Search methods
Content Type	Text
Resource Type	Article

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