Telegraphy – Systems – Printing
Patent
1975-10-17
1977-09-13
Safourek, Benedict V.
Telegraphy
Systems
Printing
325 4, 178 691, 179 15BS, H04B 700
Patent
active
040485633
ABSTRACT:
A radio information system is described which uses the exact mathematical tios and the unique periodic angular coherence of the residual RF carrier and the digitally encoded modulation spectral components of the electromagnetic wave as emitted by a source transmitter (or transmitters) to enhance system performance and to provide new instrumentation and measurement capabilities at the receiver apparatus. The digital modulation synchronizing code occupies a wide frequency bandwidth and is encoded for precise repetitive transmission to provide, for example in a satellite navigation system, a means of accurate synchronization and measurement of time and range parameters. Many encoded sequences of either discrete or pseudo-random types may be used as the synchronizing code. However in the description herein the pseudo-random noise (PRN) codes are used for their added advantage in spread spectrum discrimination against intentional interference. The total or composite RF signal typically also includes non-interfering information or message modulation.
REFERENCES:
patent: 3305636 (1967-02-01), Webb
patent: 3593138 (1971-07-01), Dunn et al.
patent: 3766315 (1973-10-01), Couvillon, Jr. et al.
patent: 3854011 (1974-12-01), Mallory et al.
patent: 3947634 (1976-03-01), Betts
patent: 3958083 (1976-05-01), Hara et al.
IBM Technical Disclosure Bulletin, Dec. 1967, vol. 10, No. 7, p. 923.
Psitos Aristotelis M.
Safourek Benedict V.
The United States of America as represented by the Secretary of
LandOfFree
Carrier-modulated coherency monitoring 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 Carrier-modulated coherency monitoring system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier-modulated coherency monitoring system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-276872