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1. (WO2001035525) SEQUENTIAL-ACQUISITION, MULTI-BAND, MULTI-CHANNEL, MATCHED FILTER

Pub. No.:    WO/2001/035525    International Application No.:    PCT/US2000/028895
Publication Date: Fri May 18 01:59:59 CEST 2001 International Filing Date: Fri Nov 10 00:59:59 CET 2000
IPC: H03H 17/02
Applicants: ITT MANUFACTURING ENTERPRISES, INC.
Inventors: BIERLY, Scott
HARLACHER, Marc
WEINBERG, Aaron
Title: SEQUENTIAL-ACQUISITION, MULTI-BAND, MULTI-CHANNEL, MATCHED FILTER
Abstract:
A parallel digital matched filter is constructed which performs numerous simultaneous correlations of a received spread spectrum signal against various replica offsets of its spreading sequence. This allows for the rapid acquisition (12) of the received signal code phase, and subsequent handoff to tracking (14) for a multi-channel receiver. A novel matched filter computational architecture is utilized, in which common digital arithmetic elements are used for both acquisition and tracking purposes. As each channel is sequentially acquired by the parallel matched filter, a subset of the arithmetic elements are then dedicated to the subsequent tracking of that channel. This process is repeated, with the remaining available arithmetic elements accelerating the acquisition of the next channel, and so on, until all resources are allocated as tracking channels. Additionally, multiple data inputs and delay lines (10) are present in this architecture, and are available for processing at each arithmetic element. In this way, multiple signal bands and user channels may be integrated within a common receiver framework.