DEVELOPMENT OF A TIME-INTEGRATING CORRELATOR FOR THE PROCESSING OF SPREAD SPECTRUM SIGNALS

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Authors
  1. Brousseau, N.
  2. Salt, J.W.A.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
An optoelectronic processor was built at DREO for the detection and processing, of spread spectrum radar and communication signals in presence of noise and interfering signals. The design and performance of the processor, a Time-Integrating Correlator (TIC), are presented. A general description of the TIC, of its operation, components and subsystems is included. The signal processing and the data collection procedure are also described. The digital controller, the packaging of the system and the effects of the temperature changes on the stability of the TIC are presented. Experimental measurements of the performance of the TIC were performed with binary phase shift keyed input signals with chip rates up to 20 MHz and the results are included. The TIC has a 30 MHz bandwidth and can detect reliably correlation peaks on a time difference of arrival window of 90 mu s. The dynamic range of the prototype is 60 dB and it can produce detectable correlation peaks in additive white Gaussian noise for input signals having a signal to noise ratio of -35 dB while using a processing gain of 40 dB. The performance of the TIC, for that particular set of parameters, is thus within 5 dB from the theoretical limit.
Keywords
Time-integrating correlator
Report Number
DREO-1298 — Technical report
Date of publication
01 Nov 1996
Number of Pages
56
DSTKIM No
97-00487
CANDIS No
500782
Format(s):
Hardcopy;Document Image stored on Optical Disk

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