Pulse or digital communications – Repeaters – Testing
Patent
1983-08-22
1985-07-09
Bookbinder, Marc E.
Pulse or digital communications
Repeaters
Testing
375 96, 375102, 375120, 343378, 343383, H04B 110, H04B 1500
Patent
active
045286744
ABSTRACT:
A method and apparatus for baseband generation of a spread spectrum reference signal for an LMS adaptive array processor is provided. An IF summed, weighted spread spectrum signal is output from the processor and translated to baseband to produce an I (in-phase) channel spread baseband signal and a Q channel (quadrature-phase) spread baseband signal. A baseband correlator receives the I channel and Q channel baseband signals and delayed versions of in-phase and quadrature-phase PN signals and produces despread I channel and Q channel baseband output signals. A baseband linear spreader receives the despread I channel and Q channel baseband output signals and the in-phase and quadrature-phase PN signals and produces respread I channel and Q channel baseband signals. A baseband modulator modulates the respread I channel and Q channel baseband signals with a phase-shifted local oscillator to produce the reference signal. The reference signal is subtracted from the spread spectrum signal to produce an error signal consisting essentially of the undesired signal components in the spread spectrum signal. The adaptive array processor minimizes the mean-square value of the error signal to minimize these undesired signal components. If desired, multi-channel capability can be provided by a summer for summing respread I channel and Q channel baseband signals from a plurality of channels in the spread spectrum communication system.
REFERENCES:
patent: 4017798 (1977-04-01), Gordy et al.
patent: 4079380 (1978-03-01), Esry et al.
patent: 4122393 (1978-10-01), Gordy et al.
patent: 4156877 (1979-05-01), Piesinger
patent: 4161733 (1979-07-01), Piesinger
patent: 4203071 (1980-05-01), Bowles et al.
patent: 4361891 (1982-11-01), Lobenstein et al.
Sanders David E.
Sweeney Dennis A.
Bookbinder Marc E.
Crowder, Jr. Albert M.
E-Systems Inc.
Glenny Raymond C.
LandOfFree
Method and apparatus for baseband generation of a spread spectru 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 baseband generation of a spread spectru, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for baseband generation of a spread spectru will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-913731