Method and apparatus for improved zero intermediate frequency re

Details Method and apparatus for improved zero intermediate frequency re Method and apparatus for improved zero intermediate frequency re

1995-12-19

1998-01-20

Vo, Nguyen

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455208, 455255, 455310, H04B 116

Patent

active

057109982

ABSTRACT:
A transceiver (10) in a first embodiment includes a zero intermediate frequency (ZIF) receiver (11), which achieves high throughput operation by reducing receiver latency time due to receiver response within a receiver pass band to carrier spectral components of a modulated carrier frequency. During a receive mode, a receiver local oscillator (LO) frequency is offset from the carrier frequency within the receiver pass band, preferably as determined by worst case errors in the carrier frequency and the LO frequency. During a transmit mode, the receiver LO frequency is modulated in such a way as to suppress the LO center frequency component in the modulated spectrum.

REFERENCES:
patent: 4523324 (1985-06-01), Marshall
patent: 4653117 (1987-03-01), Heck
patent: 4944025 (1990-07-01), Gehring et al.
patent: 5003621 (1991-03-01), Gailus

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