Dual down conversion GPS receiver with single local oscillator

Details Dual down conversion GPS receiver with single local oscillator Dual down conversion GPS receiver with single local oscillator

1989-06-01

1992-04-28

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455318, 331 22, H04B 126

Patent

active

051083345

ABSTRACT:
An antenna is employed to receive a (1540 f0) L1 GPS-satellite signal. In addition, a filter, an (RF) amplifier, a harmonic mixer, and a (sole) local oscillator are employed, the combination configured to mix the seventh harmonic of a 192 f0 local oscillator generated signal with the receive satellite signal to down-convert the frequency of the received GPS-satellite signal to a 196 f0 IF frequency. Further, another filter, an (IP) amplifier, and a mixer are employed, the combination configured to mix the fundamental of the 192 f0 local oscillator generated signal with the 196 f0 GPS-satellite signal to down-convert the frequency of the satellite signal to four f0. Finally, yet another filter and an amplifier are employed, the combination configured to filter and amplify the four f0 GPS-satellite signal.

REFERENCES:
patent: 4580289 (1986-04-01), Enderby
patent: 4673891 (1987-06-01), Remy
patent: 4727594 (1988-02-01), Ruppel

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