Single RF oscillator single-side band modulation for RFID...

Details Single RF oscillator single-side band modulation for RFID... Single RF oscillator single-side band modulation for RFID...

2006-09-12

2006-09-12

Le, Lana (Department: 2618)

Telecommunications

Transmitter

Plural modulation

C455S203000, C455S109000, C455S047000, C375S344000

Reexamination Certificate

active

07107022

ABSTRACT:
A transmitter upconverts a SSB data signal during a first operational mode using a RF upconverting signal having a frequency that is offset from a center frequency of a channel (ωC) by an amount that depends on the data signal's SSB bandwidth (ωM). In a second operational mode, the transmitter upconverts a tone signal having a frequency ωMusing the same RF upconverting signal. The upconverted tone signal can be used as a continuous wave (CW) carrier signal having a frequency ωC. The transmitter has a single RF oscillator to output both a SSB signal centered at frequency ωCduring the first mode and a carrier signal of frequency ωCduring the second mode.

REFERENCES:
patent: 4328590 (1982-05-01), Lee
patent: 4691375 (1987-09-01), McGeehan et al.
patent: 4955083 (1990-09-01), Phillips et al.
patent: 5222250 (1993-06-01), Cleveland et al.
patent: 5249202 (1993-09-01), Hillum et al.
patent: 5491727 (1996-02-01), Petit
patent: 7027792 (2006-04-01), Luff et al.
patent: 2005/0099270 (2005-05-01), Diorio et al.

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