Pulse or digital communications – Repeaters – Testing
Patent
1991-10-08
1994-04-26
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
375 27, 375 34, 371 374, 371 378, 371 43, H04L 512
Patent
active
053073770
ABSTRACT:
Encoding and decoding devices (5, 105) influencing digital signals transmitted with encoded modulation. For the encoding a channel encoder (12) performs a code concatenation to distribute the protection redundancy bits over various symbol periods of the encoded modulation, for example, over two multiplexed 16 QAMs. A source encoder (11) may effect a reduction of the input bit rate. A differential encoder (31) may be used for the encoding so as to ensure the detection of the phase rotation invariance of the code. At the receiver end a decoding device (105) performs the corresponding operations in reverse. The invention may be used for digital signal transmission of: television, microwave, mobile radio signals, for storage on compact disc or on digital video recorder, for communication between computers.
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Chouly Antoine
Fazel Khaled
Chin Stephen
Marion Michael E.
U.S. Philips Corporation
Vo Don N.
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