DocumentCode :
1227514
Title :
Decoder for Delay-Modulation Coded Data
Author :
Lewin, J.
Author_Institution :
Astro-Electronics Division, RCA,Princeton,NJ
Volume :
19
Issue :
5
fYear :
1971
fDate :
10/1/1971 12:00:00 AM
Firstpage :
719
Lastpage :
723
Abstract :
"Delay modulation," originally developed in conjunction with high density digital (saturation) tape recoding, combines the advantages of narrow bandwidth of pulse-code modulation (PCM) nonreturn to zero (NRZ) and the advantages of self-timing information inherent in phase modulation. This paper describes a decoding technique for the conversion of delay-modulated digital data to NRZ C data. A potential time-phase ambiguity in reception and decoding of delay-modulated data is resolved in real time, through monitoring the data stream for a unique waveform inherent in delay-modulated data. Statistical backup is provided. Included are logic implementation and timing diagrams.
Keywords :
Bandwidth; Decoding; Delay effects; Digital modulation; Monitoring; Optical signal processing; Phase change materials; Phase modulation; Propagation delay; Pulse modulation;
fLanguage :
English
Journal_Title :
Communication Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9332
Type :
jour
DOI :
10.1109/TCOM.1971.1090693
Filename :
1090693
Link To Document :
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