Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1994-09-14
1997-09-30
Chin, Wellington
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
375281, 375331, 375341, 329304, 371 401, 371 43, H04L 2700, H03D 100, H04Q 120
Patent
active
056732910
ABSTRACT:
Systems and methods according to the present invention provide a combination of demodulation and decoding, termed decodulation herein. By using knowledge of known symbols, decoding known symbols first, and then using the information obtained by decoding known symbols to decode unknown symbols, improved performance can be achieved. This technique can also be used to alleviate the conventional 3dB loss suffered systems using differentially coding and modulation as compared to coherent detection systems.
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Chin Wellington
Ericsson Inc.
Luther William
LandOfFree
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