AMPS receiver using a zero-IF architecture

Details AMPS receiver using a zero-IF architecture AMPS receiver using a zero-IF architecture

2006-04-04

2006-04-04

Vuong, Quochien B. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S205000, C455S324000, C455S334000, C375S345000

Reexamination Certificate

active

07024169

ABSTRACT:
An AMPS receiver system utilizing a ZIF architecture and processing received forward link signals in the digital domain. The AMPS receiver system includes an antenna (105), a direct converter (110), high dynamic A/D converters (120,130), low pass filters (140, 150), a phase shifter (160), a digital VGA (170), a digital FM demodulator (180), an accumulator (185) and a controller (190). The direct converter (110) further includes a low noise amplifier (112), a splitter (113), mixers (114,116) and low pass filters (118,119). The controller (190) adjusts the gains of the low noise amplifier (112) and the digital VGA (170) based on the average power of the signal outputted by the digital VGA (170).

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