Title :
Adaptive rate coding for image data transmission
Author :
Bhaskar, Vidhyacharan ; Joiner, Laurie L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Alabama Univ., Huntsville, AL, USA
Abstract :
Punctured convolutional codes (PCCs) are necessary for applications requiring high data transmission rate. For efficient high rate codes, PCCs have been widely used to reduce the implementation complexity of the Viterbi decoder. The codes provide good bit-error-rate (BER) performance. A slowly time-varying frequency non-selective Rician fading channel is assumed. A finite-state Markov chain is used to model the time-varying channel. The error control system uses channel-state information to decode, which of the various codes should be used at any given moment. The paper provides a comparison of lower and higher rate codes in terms of coding gain and providing sufficient error control.
Keywords :
Markov processes; Rician channels; Viterbi decoding; adaptive codes; convolutional codes; error correction codes; image coding; time-varying channels; Viterbi decoder; adaptive rate coding; bit-error-rate performance; channel-state information; coding gain; error control system; finite-state Markov chain; high data transmission rate; higher rate codes; image data transmission; lower rate codes; punctured convolutional codes; slowly time-varying frequency nonselective Rician fading channel; Bit error rate; Convolutional codes; Data communication; Decoding; Error correction; Frequency; Image coding; Rician channels; Time-varying channels; Viterbi algorithm;
Conference_Titel :
System Theory, 2002. Proceedings of the Thirty-Fourth Southeastern Symposium on
Print_ISBN :
0-7803-7339-1
DOI :
10.1109/SSST.2002.1027045
