NDLI: An iterative method for code acquisition using DOA estimation and beamforming

Content Provider	IEEE Xplore Digital Library
Author	Puska, H. Saarnisaari, H. Iinatti, J.
Copyright Year	2005
Description	Author affiliation: Centre for Wireless Commun., Oulu Univ. (Puska, H.; Saarnisaari, H.; Iinatti, J.)
Abstract	This paper introduces a method used for code synchronization in direct sequence spread spectrum (DS/SS) systems when the receiver is equipped with a smart antenna followed by the matched filter (MF). The presented method first estimates the direction-of-arrival (DOA) of the DS-signal, then performs beamforming, and finally makes synchronization decision based on the maximum output of the MF. Because the amount of data needed in DOA estimation depends on the prevailing signal-to-noise ratio (SNR), the proposed method operates iteratively. The method starts by collecting a piece of data for DOA estimation. Due to the inaccurate DOA estimation, the main beam of the radiation pattern may be steered to erroneous direction and code acquisition may be failed. After a fail more data is collected and the accuracy of DOA estimate improves. This process is repeated until DOA and delay estimation succeeds. The results show that it is advantageous to start by collecting only a small amount of data for DOA estimation because the shortest mean acquisition times are achieved in that case
Starting Page	1165
Ending Page	1169
File Size	2511440
Page Count	5
File Format	PDF
ISBN	9783800729098
DOI	10.1109/PIMRC.2005.1651624
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-11
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iterative methods Direction of arrival estimation Array signal processing Spread spectrum communication Matched filters Signal processing Receiving antennas Interference Linear antenna arrays Phased arrays pseudonoise coded communication Antenna arrays array signal processing synchronization
Content Type	Text
Resource Type	Article

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