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alternate symbol inversion for improved symbol synchronization in convolutionally coded systemsInverting alternate symbols of the encoder output of a convolutionally coded system provides sufficient density of symbol transitions to guarantee adequate symbol synchronizer performance, a guarantee otherwise lacking. Although alternate symbol inversion may increase or decrease the average transition density, depending on the data source model, it produces a maximum number of contiguous symbols without transition for a particular class of convolutional codes, independent of the data source model. Further, this maximum is sufficiently small to guarantee acceptable symbol synchronizer performance for typical applications. Subsequent inversion of alternate detected symbols permits proper decoding.
Document ID
19800042485
Document Type
Reprint (Version printed in journal)
Authors
Simon, M. K.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Smith, J. G.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 10, 2013
Publication Date
February 1, 1980
Publication Information
Publication: IEEE Transactions on Communications
Volume: COM-28
Subject Category
COMMUNICATIONS AND RADAR
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other