DEMODULATION REFERENCE SIGNAL SOURCE

• Main Authors: BLAKE, JAMES, DANKWORT, RUDOLF, DANE, PRESTON
• Format: Patent
• Language: English; French; German
• Published: 22.06.1994
• Edition: 5
• Subjects: GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

An information retrieval system for extracting information from a pair of substantially coherent electromagnetic waves represented by phase differences therebetween each of which is incident on a photodetector, and having a demodulator which receives the photodetector output signal and which also re...