Pulse or digital communications – Transmitters
Patent
1997-01-07
1998-05-26
Chin, Stephen
Pulse or digital communications
Transmitters
375303, 375324, 375334, 375344, 375345, 375200, 455214, 4552341, 455257, 341 68, 370342, H04L 2710, H04J 1302, H04B 104, H04B 116
Patent
active
057578583
ABSTRACT:
A dual-mode digital communication system for communicating an information signal during operation in frequency-modulated (FM) and multiple-access modes is disclosed herein. The digital communication system includes a dual-mode transmitter for transmitting the information signal using an FM communication signal during FM mode operation, and for transmitting the information signal using a multiple-access communication signal during multiple-access mode operation. The communication system further includes a dual-mode receiver for receiving the FM communication signal during FM mode operation, and for receiving the multiple-access communication signal during multiple-access mode operation. Incorporated within the dual-mode receiver is a digital demodulator for recovering the information signal from the received FM signal during operation in the FM mode, and for recovering the information signal from the received multiple-access signal during multiple-access mode operation. In a preferred implementation the dual-mode transmitter is disposed to convert a first sequence of binary data within the information signal into a sampled modulation waveform, and to provide the FM communication signal by modulating a carrier signal based at least in part on the sampled modulation waveform. The dual-mode transmitter may also be configured to multiplex a second sequence of wideband message data with the sampled modulation waveform so as to form a composite FM modulation waveform.
REFERENCES:
patent: 4577157 (1986-03-01), Reed
patent: 4603300 (1986-07-01), Welles, II et al.
patent: 4675882 (1987-06-01), Lillie et al.
patent: 4776039 (1988-10-01), Akaiwa
patent: 4878035 (1989-10-01), Vendely et al.
patent: 4944025 (1990-07-01), Gehring et al.
patent: 5003621 (1991-03-01), Gailus
patent: 5010585 (1991-04-01), Garcia
patent: 5107225 (1992-04-01), Wheatley, III et al.
patent: 5111163 (1992-05-01), Erlich
patent: 5151923 (1992-09-01), Fujiwara
patent: 5163159 (1992-11-01), Rich et al.
patent: 5212826 (1993-05-01), Rabe et al.
patent: 5289464 (1994-02-01), Wang
patent: 5289496 (1994-02-01), Nakagawa et al.
patent: 5291516 (1994-03-01), Dixon et al.
patent: 5299228 (1994-03-01), Hall
patent: 5309479 (1994-05-01), Cheah
patent: 5414736 (1995-05-01), Hasegawa et al.
patent: 5436590 (1995-07-01), Simard et al.
patent: 5436955 (1995-07-01), Kaewell, Jr. et al.
patent: 5451948 (1995-09-01), Jekel
patent: 5475705 (1995-12-01), Dent
patent: 5539770 (1996-07-01), Ishigaki
Black Peter J.
Wilson Nathaniel B.
Chin Stephen
Gluck Jeffrey W.
Martin Roger W.
Miller Russell B.
Qualcomm Incorporated
LandOfFree
Dual-mode digital FM communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual-mode digital FM communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual-mode digital FM communication system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1972753