Title :
Combined source-channel coding using channel-optimized quantizer and multicarrier modulation
Author :
Ho, Kemg-Po ; Kahn, Joseph M.
Author_Institution :
Bellcore, Red Bank, NJ, USA
Abstract :
We present an algorithm for design of a joint source-channel coder using a channel-optimized quantizer and multicarrier modulation. By changing the power of each subchannel in the multicarrier modulation system, different error protection can be provided for different bits according to their importance. The algorithm converges to a locally optimum system design. Compared to a Lloyd-Max (1982, 1960) scalar quantizer or a LBG vector quantizer using single-channel transmission, our optimized system can yield substantial performance improvements. The performance improvements are most pronounced at low channel signal-to-noise ratios
Keywords :
channel coding; error correction codes; modulation; optimisation; source coding; telecommunication channels; LBG vector quantizer; Lloyd-Max scalar quantizer; SNR; algorithm; channel-optimized quantizer; error protection; locally optimum system design; low channel signal-to-noise ratios; multicarrier modulation; multicarrier modulation system; performance improvements; single-channel transmission; source-channel coder design; source-channel coding; subchannel power; Algorithm design and analysis; Bit error rate; Computer errors; Modulation coding; Power engineering computing; Power system protection; Quantization; Signal to noise ratio; Springs; Transmitters;
Conference_Titel :
Communications, 1996. ICC '96, Conference Record, Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-3250-4
DOI :
10.1109/ICC.1996.533624
