Technique for demodulating and decoding MLS DPSK transmissions u

Details Technique for demodulating and decoding MLS DPSK transmissions u Technique for demodulating and decoding MLS DPSK transmissions u

1990-07-16

1992-08-25

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Aircraft landing system

Microwave landing system

342195, 342194, 342 40, 329346, G01S 7295, G01S 7288

Patent

active

051422875

ABSTRACT:
A system for demodulating and decoding differential phase shift keying (DPSK) transmissions utilizes a bandpass filter, an analog to digital converter and a digital signal processor. Removal of the effects of unknown frequency component is achieved by applying a complex phase correction/rotation factor after DPSK demodulation. The actual phase of the complex signal is never computed directly. All of the processing from Rader decomposition through carrier tracking filter is performed on the complex values and therefore requires only multiplication and addition operations which can be performed at high speed in a microcomputer or in dedicated arithmetic hardware.

REFERENCES:
patent: 3742498 (1973-06-01), Dunn
patent: 4010465 (1977-03-01), Dodington et al.
patent: 4084137 (1978-04-01), Welti
patent: 4499586 (1985-02-01), Cafarella et al.
patent: 4559538 (1985-12-01), Hetyei et al.
patent: 4568942 (1986-02-01), Letocquart
patent: 4617569 (1986-10-01), Letoquart
patent: 4623892 (1986-11-01), Enein
patent: 4648101 (1987-03-01), Hamzaoui et al.
patent: 4677442 (1987-06-01), Enein
patent: 4757316 (1988-07-01), Brault et al.
patent: 4757320 (1988-07-01), Letoquart et al.
patent: 4794543 (1988-12-01), Enein et al.
patent: 4823127 (1989-04-01), Roelofs et al.
patent: 4890110 (1989-12-01), Kuwahara
patent: 5015962 (1991-05-01), Brault et al.
Schwartz, M. et al, "Communication Systems and Techniques", McGraw-Hill Book Company, pp. 304-310, (1966).
"Annex 10 to the Convention on International Civil Aviation", vol. 1, Ch. 3.11, ICAO, Montreal, Oct. 1987.
"Minimum Operational Performance Standards for Microwave Landing System Airborne Receiving Equipment", DO-177, Change 2, RTCA, Wash., D.C., Sep. 1986.

Affiliated with

Also associated with

Rating

Technique for demodulating and decoding MLS DPSK transmissions u does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Technique for demodulating and decoding MLS DPSK transmissions u, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Technique for demodulating and decoding MLS DPSK transmissions u will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-388164