Method and apparatus for generating a modulated signal

Details Method and apparatus for generating a modulated signal Method and apparatus for generating a modulated signal

1997-12-01

1998-11-17

Mis, David

Modulators

Pulse or interrupted continuous wave modulator

Pulse width modulator

332107, 332108, 332112, 375238, 375239, H03C 500, H03K 708, H03K 710, H04L 2736

Patent

active

058382100

ABSTRACT:
A method and apparatus for generating a modulated signal include a pulse modulation source (215), a pulse modulator (20) for modulating a pulsed signal, a high efficiency power amplifier (230) for amplifying the modulated pulsed signal, and a harmonic reduction filter (240) for passing the switching frequency of the pulsed signal as the RF carrier. The pulse modulation source (215) accepts baseband inphase and quadrature signals and determines phase values and duty ratios for modulating the pulsed signal. The pulse modulator (20) phase modulates and duty cycle modulates the pulsed signal before it is amplified and filtered. A quadrature demodulator (260) produces baseband inphase and quadrature feedback signals for increased linearity.

REFERENCES:
patent: 5251330 (1993-10-01), Chiba et al.
patent: 5295158 (1994-03-01), Jordan
patent: 5481230 (1996-01-01), Chang et al.
An article entitled "Single-Sideband Transmission By Enveloped Elimination And Restoration", by Leonard R. Kahn, Member IRE, from Proceedings Of The I.R.E., 1952, pp. 803-806.

Affiliated with

Also associated with

Rating

Method and apparatus for generating a modulated signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for generating a modulated signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for generating a modulated signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-888102