Pulse or digital communications – Repeaters – Testing
Patent
1989-12-26
1991-04-30
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
455340, 375103, 328151, H04B 1500
Patent
active
050124900
ABSTRACT:
A digital communication system has a plurality of channels with distinct carrier frequencies and overlapping bands. Each receiver includes a filter having a time varying bandwidth. The received signal includes at least one carrier modulated by an information signal having a plurality of levels and transitions between the levels at predetermined intervals and components due to other channels. The receiver is synchronized to a selected one of the carriers. The received signal is translated to baseband and applied to the time varying filter which is set to a first bandwidth at the information signal transitions and reduced in the intervals between transitions. The first filter bandwidth accommodates the information signal transitions. Reducing the bandwidth between transitions limits interference components in the time varying filter output when the information signal level is sampled. The technique may be applied to various modulation schemes.
REFERENCES:
patent: 3792195 (1974-02-01), Wilson et al.
patent: 3904968 (1975-09-01), Brinegar
patent: 4045740 (1977-08-01), Baker
patent: 4087750 (1978-05-01), Allen et al.
patent: 4189755 (1980-02-01), Balbes et al.
patent: 4597107 (1986-06-01), Rzady et al.
patent: 4601045 (1986-07-01), Lubarsky
patent: 4792993 (1988-12-01), Ma
patent: 4862175 (1989-08-01), Biggs et al.
AT&T Bell Laboratories
Chin Stephen
Safourek Benedict V.
Steinmetz A. G.
LandOfFree
Varying bandwidth digital signal detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Varying bandwidth digital signal detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Varying bandwidth digital signal detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-646631