Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1985-03-20
1985-10-22
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
455 52, 455 62, 455166, H04B 708
Patent
active
045493111
ABSTRACT:
An improved method and apparatus for measuring the strength of a radio frequency (RF) signal subject to Rayleigh fading is described. The strength of the RF signal is sampled two or more times during a predetermined time interval and the sampled signal strength having the largest magnitude is selected. The selected signal strength is a reasonably accurate measure of the signal strength since the true average strength of a Rayleigh fading signal is close to its peak signal strength. The inventive method and apparatus is particularly well adapted for use in a scanning receiver located in a base station radio of a cellular radiotelephone communications system. The scanning receiver includes an antenna selector for selecting one of a plurality of sector antennas, an RF signal receiver tunable to a plurality of different RF signal frequencies, an analog-to-digital converter for converting RF signal strength samples to a binary data signal, and a microprocessor together with peripheral devices for controlling the operation of the antenna selector, RF signal receiver and analog-to-digital converter.
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Bookbinder Marc E.
Hackbart Rolland R.
Motorola Inc.
Southard Donald B.
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