Enhanced time of arrival method

Details Enhanced time of arrival method Enhanced time of arrival method

1995-06-06

1998-06-09

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

364550, 375208, H04B 1500

Patent

active

057646864

ABSTRACT:
A method for improving a radio location system based on time-of-arrival. Time-of-arrival radio location systems are limited in ultimate accuracy by signal-to-noise ratio and by the time varying multipath environment in which they must operate. The present invention teaches techniques which maintain a high signal-to-noise ratio while identifying a feature of the received signal which is least affected by multipath. The technique uses correlation peak/envelope information to estimate the leading edge of the correlation function, then enhances discrete samples at the leading edge of the correlation function to yield high signal-to-noise ratio readings. The present invention can reduce required transmitted bandwidth, increase system resolution and accuracy by twenty to one, and maintain high message traffic throughput.

REFERENCES:
patent: 5056106 (1991-10-01), Wang et al.
patent: 5265121 (1993-11-01), Stewart
patent: 5430889 (1995-07-01), Hulbert et al.

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