Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1991-09-04
1993-08-17
Logan, Sharon D.
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
341117, H03M 166, H03M 148
Patent
active
052373240
ABSTRACT:
A system provides I and Q baseband analog modulation signals for use in GMSK modulation responsive to serial bits of digital data. The I baseband modulation signal is represented by I(t)=cos [2.pi.f.sub.m .intg.g(t)dt] and the Q baseband modulation signal is represented by Q(t)=sin [2.pi.f.sub.m .intg.g(t)dt], wherein f.sub.m is the modulating frequency and g(t) is a filtered version of the serial bits of digital data. The system includes an input for receiving the serial bits of digital data, a memory including addressable memory locations for storing data representing the waveform amplitudes of the I and Q modulation baseband analog signals, and an address generator for addressing selected ones of the memory locations responsive to the serial bits of digital data. The system further includes digital to analog converters coupled to the memory for receiving the data stored at the memory locations addressed by the address generator and for converting the data to the I and Q modulation baseband analog signals.
REFERENCES:
patent: 3744050 (1973-07-01), Hedrick
patent: 3772681 (1973-11-01), Skingle
patent: 3794995 (1974-02-01), Thompson
patent: 3905030 (1975-09-01), Lavanant et al.
patent: 4039806 (1977-08-01), Fredriksson et al.
patent: 4160245 (1979-07-01), Scott
patent: 5111202 (1992-05-01), Rivera et al.
Hendrickson Alan F.
Linz Alfredo R.
Advanced Micro Devices , Inc.
Logan Sharon D.
LandOfFree
System and method for producing baseband analog modulation signa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for producing baseband analog modulation signa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for producing baseband analog modulation signa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2247333