NDLI: Achieving unequal error protection with convolutional codes

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Achieving unequal error protection with convolutional codes

Content Provider	NASA Technical Reports Server (NTRS)
Author	Costello Jr., D. J. Mills, D. G. Palazzo Jr., R.
Copyright Year	1994
Description	This paper examines the unequal error protection capabilities of convolutional codes. Both time-invariant and periodically time-varying convolutional encoders are examined. The effective free distance vector is defined and is shown to be useful in determining the unequal error protection (UEP) capabilities of convolutional codes. A modified transfer function is used to determine an upper bound on the bit error probabilities for individual input bit positions in a convolutional encoder. The bound is heavily dependent on the individual effective free distance of the input bit position. A bound relating two individual effective free distances is presented. The bound is a useful tool in determining the maximum possible disparity in individual effective free distances of encoders of specified rate and memory distribution. The unequal error protection capabilities of convolutional encoders of several rates and memory distributions are determined and discussed.
File Size	790434
Page Count	21
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950005350
Archival Resource Key	ark:/13960/t0dv6g42z
Language	English
Publisher Date	1994-08-01
Access Restriction	Open
Subject Keyword	Computer Programming And Software Coders Signal Encoding Error Analysis Bit Error Rate Transfer Functions Error Detection Codes Error Correcting Codes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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