Title :
Hybrid ARQ with selective combining for video transmission over wireless channels
Author :
Zhang, Qinqing ; Kassam, Saleem A.
Author_Institution :
Moore Sch. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA
Abstract :
We investigate hybrid ARQ schemes for low-bit-rate video transmission over wireless channels. We propose and analyze a hybrid ARQ with a selective combining scheme using rate-compatible punctured convolutional (RCPC) codes on Rayleigh fading channels. It is shown that our scheme performs better than the generalized type-II ARQ for bursty error channels. Simulations of a real-time video TDMA transmission system are also performed. A better video quality can be obtained by our proposed scheme with a bounded delay. Analytical results of the throughput and packet error rate are compared to the simulation results. Our analysis based on a finite-state Markov channel model is shown to give very good agreement with simulations
Keywords :
Markov processes; Rayleigh channels; automatic repeat request; coding errors; convolutional codes; error statistics; fading; packet radio networks; time division multiple access; video coding; visual communication; Rayleigh fading channels; bounded delay; bursty error channels; finite-state Markov channel model; generalized type-II ARQ; hybrid ARQ; low bit rate; packet error rate; rate-compatible punctured convolutional codes; real-time TDMA system; selective combining; simulation results; throughput; video quality; video transmission; wireless channels; Analytical models; Automatic repeat request; Convolutional codes; Decoding; Delay; Error analysis; Error correction; Error correction codes; Fading; Forward error correction; Quality of service; Real time systems; Redundancy; Throughput; Time division multiple access;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.638590
