Wireless quadrature modulator transmitter using E/O and O/E...

Details Wireless quadrature modulator transmitter using E/O and O/E... Wireless quadrature modulator transmitter using E/O and O/E...

2006-01-24

2006-01-24

Burd, Kevin (Department: 2631)

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

C375S264000, C375S261000, C375S295000, C398S183000

Reexamination Certificate

active

06990155

ABSTRACT:
A transmitting circuit apparatus has a first digital modulator and a second digital modulator for modulating an I signal and a Q signal which are multi-valued digital baseband modulation signals, into a digital I signal and a digital Q signal, respectively, having the number of bits smaller than that of the baseband modulation signals; and a quadrature modulator for outputting a signal synthesized from the signals generated by modulating (two) carrier waves each having a phase perpendicular to each other by using the modulated I and Q signals, respectively.

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European Search Report corresponding to application No. EP 01-11-3018 dated Sep. 13, 2004.

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