Boots – shoes – and leggings
Patent
1986-08-04
1987-02-24
Krass, Errol A.
Boots, shoes, and leggings
307494, 307542, 328162, 364571, H04B 1500, G06F 1520, G06G 719
Patent
active
046462546
ABSTRACT:
A noise threshold estimating method for use in a high signal density environment defines a noise threshold level for a plurality of frequency divided channels such that X number of said channels will be defined as being active channels and the remaining channels as being inactive. Using a novel closed loop feedback technique to define a noise threshold level, the noise threshold estimator first compares the signal level of each incoming channel with an analog threshold voltage. A logic device counts the number of active channels and then scales that number according to a predetermined scaling function. The scaled binary number is added with the noise threshold level from the previous clocked interval to define a new noise threshold level. This binary noise threshold level is converted into an analog voltage and feedback to the feedback input of the noise comparison devices to be compared with the signal level of each incoming channel.
REFERENCES:
patent: 3731072 (1973-05-01), Johnston
patent: 3818205 (1974-06-01), Wehrmann
patent: 4283767 (1981-08-01), Rountree
patent: 4520280 (1985-05-01), Yoshikawa et al.
patent: 4538236 (1985-08-01), Dischert et al.
Jackson Randall L.
Marple David P.
O'Connor Michael
Gilbert Douglas M.
GTE Government Systems Corporation
Herndon H. R.
Krass Errol A.
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