Title :
Video transmission performance with adaptive time diversity over PHS channels
Author :
Kondo, Yasushi ; Tanaka, Toshiaki
Author_Institution :
Wireless Syst. Labs., NTT, Japan
Abstract :
Adaptive time diversity for CBR transmission in a time division duplex (TDD) system is proposed and its BER performance and video transmission performance are evaluated in PHS radio environments. In a TDD system, the frame error in the forward channel can be predicted from the frame error in the backward channel with high probability. We revealed that the proposed scheme shows a better BER performance than the RCPC code with practical interleaving in a Rayleigh fading environment. The proposed scheme improved the image SNR
Keywords :
Rayleigh channels; adaptive systems; coding errors; diversity reception; error statistics; fading; personal communication networks; video coding; videotelephony; BER performance; CBR transmission; PHS channels; PHS radio environments; RCPC code; Rayleigh fading environment; TDD system; adaptive time diversity; backward channel; coded video transmission; forward channel; frame error; image SNR; interleaving; personal communication system; probability; time division duplex system; video transmission performance; Automatic repeat request; Bit error rate; Data communication; Delay; Error correction; Forward error correction; Interleaved codes; Land mobile radio; Rayleigh channels; Telephony;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1997. Waves of the Year 2000. PIMRC '97., The 8th IEEE International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-3871-5
DOI :
10.1109/PIMRC.1997.627047
