Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent
1995-01-20
1998-02-03
Urban, Edward F.
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
455 86, 370280, H04B 156
Patent
active
057155208
ABSTRACT:
The radio frequency transceiver was developed for use in a time division duplex (TDD) radiotelephone communication system. The transceiver includes a local oscillator which generates at least two local oscillator signals at different times. Each local oscillator signal has a unique frequency. During a first time period, the radio frequency transceiver receives a radio frequency signal. The first radio frequency signal is combined with one of the local oscillator signals, forming an intermediate frequency signal. During a second time period and substantially during the first time period, the transceiver generates a frequency offset signal. The frequency offset signal is combined with the second local oscillator signal, forming a second radio frequency signal. The intermediate frequency signal and the offset frequency signal are designed to have different frequencies to avoid the self-quieting problem inherent in a TDD communication system.
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Hillock Randall R.
Ruppel John S.
Dailey Kirk W.
Motorola Inc.
Oskorep John J.
Rauch John G.
Urban Edward F.
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