Title :
A turbo-coded burst-by-burst adaptive wide-band speech transceiver
Author :
Keller, Thomas ; Münster, Matthias ; Hanzo, Lajos
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
Turbo-coded burst-by-burst adaptive orthogonal frequency division multiplex (AOFDM) wide-band speech transceivers are proposed. A constant throughput adaptive OFDM transceiver was designed and benchmarked against a time-variant rate scheme. The proposed joint adaptation of source-codec, channel-codec, and modulation regime results in attractive, robust, high-quality audio systems, capable of conveying near-unimpaired wide-band audio signals over fading dispersive channels for signal-to-noise ratios (SNR) in excess of about 5 dB.
Keywords :
OFDM modulation; adaptive codes; dispersive channels; fading channels; speech codecs; speech coding; transceivers; turbo codes; voice communication; OFDM; SNR; adaptive orthogonal frequency division multiplexing; adaptive wide-band speech transceiver; channel-codec; constant throughput adaptive OFDM transceiver; fading dispersive channels; high-quality audio systems; joint adaptation; modulation; signal-to-noise ratios; source-codec; time-variant rate scheme; turbo-coded burst-by-burst transceiver; wide-band audio signals; Audio systems; Fading; Frequency division multiplexing; OFDM modulation; Robustness; Speech; Throughput; Transceivers; Turbo codes; Wideband;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
