+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Costello, D. J., Jr. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 29 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order 1 2 3 Next  Construction of convolutional codes for sequential decoding Author(s): Costello, D. J., Jr. Abstract: Convolutional encoding and sequential decoding of digital data for reliable transmission NASA Center: NASA (non Center Specific) Publication Year: 1969 Added to NTRS: 2008-07-24 Accession Number: 70N17465; Document ID: 19700008160; Report Number: EE-692, NASA-CR-107868 A construction technique for random error correcting convolutional codes Author(s): Costello, D. J., Jr. Abstract: Algorithm for constructing random error correcting convolutional codes NASA Center: NASA (non Center Specific) Publication Year: 1968 Added to NTRS: 2008-05-28 Accession Number: 68N27228; Document ID: 19680017756; Report Number: EE-685, NASA-CR-95142 A strong lower bound on free distance for periodic convolutional codes Author(s): Costello, D. J., Jr. Abstract: No Abstract Available NASA Center: NASA (non Center Specific) Publication Year: 1970 Added to NTRS: 2008-01-29 Accession Number: 70N78416; Document ID: 19700078713; Report Number: NASA-CR-111168 On the undetected error probability of a concatenated coding scheme for error control Author(s): Deng, H.; Costello, D. J., Jr. Abstract: Consider a concatenated coding scheme for error control on a binary symmetric channel, called the inner channel. The bit error rate (BER) of the channel is correspondingly called the inner BER, and is denoted by Epsilon (sub ... NASA Center: NASA (non Center Specific) Publication Year: 1984 Added to NTRS: 2005-08-25 Accession Number: 84N26313; Document ID: 19840018245; Report Number: NAS 1.26:173613, NASA-CR-173613 Cut-off rate calculations for the outer channel in a concatenated cooling system Author(s): Herro, M. A.; Costello, D. J., Jr.; Hu, L. Abstract: Concatenated codes were long used as a practical means of achieving long block or constraint lengths for combating errors on very noisy channels. The inner and outer encoders are normally separated by an interleaver, so that ... NASA Center: NASA (non Center Specific) Publication Year: 1984 Added to NTRS: 2005-08-25 Accession Number: 84N26312; Document ID: 19840018244; Report Number: NAS 1.26:173612, NASA-CR-173612 Achieving unequal error protection with convolutional codes Author(s): Mills, D. G.; Costello, D. J., Jr.; Palazzo, R., Jr. Abstract: 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 ... NASA Center: NASA (non Center Specific) Publication Year: 1994 Added to NTRS: 2005-08-25 Accession Number: 95N11763; Document ID: 19950005350; Report Number: NAS 1.26:196803, NASA-CR-196803 Probability of undetected error after decoding for a concatenated coding scheme Author(s): Costello, D. J., Jr.; Lin, S. Abstract: A concatenated coding scheme for error control in data communications is analyzed. In this scheme, the inner code is used for both error correction and detection, however the outer code is used only for error detection. A ... NASA Center: NASA (non Center Specific) Publication Year: 1984 Added to NTRS: 2004-11-03 Accession Number: 84N31992; Document ID: 19840023922; Report Number: NAS 1.26:173837, NASA-CR-173837 Reed Solomon codes for error control in byte organized computer memory systems Author(s): Lin, S.; Costello, D. J., Jr. Abstract: A problem in designing semiconductor memories is to provide some measure of error control without requiring excessive coding overhead or decoding time. In LSI and VLSI technology, memories are often organized on a multiple ... NASA Center: NASA (non Center Specific) Publication Year: 1984 Added to NTRS: 2004-11-03 Accession Number: 84N29542; Document ID: 19840021473; Report Number: NAS 1.26:173803, NASA-CR-173803 Error control techniques for satellite and space communications Author(s): Costello, D. J., Jr. Abstract: High rate concatenated coding systems with trellis inner codes and Reed-Solomon (RS) outer codes for application in satellite communication systems are considered. Two types of inner codes are studied: high rate punctured ... NASA Center: NASA (non Center Specific) Publication Year: 1986 Added to NTRS: 2004-11-03 Accession Number: 86N27517; Document ID: 19860018045; Report Number: NAS 1.26:177224, NASA-CR-177224 Multidimensional coded PSK systems using unit-memory trellis codes Author(s): Lafanechere, A.; Costello, D. J., Jr. Abstract: No Abstract Available NASA Center: NASA (non Center Specific) Publication Year: 1985 Added to NTRS: 2004-11-03 Accession Number: 86N71199; Document ID: 19860066823; Report Number: NAS 1.26:176454, NASA-CR-176454 1 2 3 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007