Radio receiver for use in a radio tracking system and a method o

Details Radio receiver for use in a radio tracking system and a method o Radio receiver for use in a radio tracking system and a method o

1995-12-06

1998-02-24

Mullen, Thomas

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

375202, H04B 1700

Patent

active

057220590

ABSTRACT:
A method and radio receiver for determining where at least one frequency hopping radio frequency transmitter is located with respect to a set range measured from a synchronized frequency hopping radio frequency receiver. Each frequency hopping radio frequency transmitter periodically transmits an identification code containing a plurality of digits which identifies each frequency hopping radio frequency transmitter. The synchronized frequency hopping radio frequency receiver determines if at least part of the digits of the identification code of one of the at least one frequency hopping radio frequency transmitter is contained therein, calculates an integral of a received signal strength indicator of each radio frequency carrier determined to contain at least part of the digits of the identification code of one of the at least one frequency hopping radio frequency transmitter, computes an average of the calculated integrals, compares the average of the calculated integrals to a numerical value representing the set range and generates an alert when the comparison reveals that at least one of the at least one frequency hopping radio frequency transmitter is outside the set range.

REFERENCES:
patent: 4675656 (1987-06-01), Narcisse
patent: 5115224 (1992-05-01), Kostusiak et al.
patent: 5179569 (1993-01-01), Sawyer
patent: 5307372 (1994-04-01), Sawyer et al.
"Safe Child" Child Locator, YES| Entertainment Corporation, .COPYRGT.1994.

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