Title :
Power Constrained Channel Optimized Vector Quantizers used for Bandwidth Expansion
Author :
Floor, Pål Anders ; Ramstad, Tor A. ; Wernersson, Niklas
Author_Institution :
Norwegian Univ. of Sci. & Technol., Trondheim
Abstract :
This paper deals with algorithms for determining well performing bandwidth expanding joint source-channel coding (JSCC) systems. The JSCC systems are realized as direct source-channel mappings. The algorithms presented are "power constrained channel optimized vector quantizers" (PCCOVQ). The PCCOVQ algorithm is a modified generalized Lloyd algorithm. Theory on PCCOVQ is presented, with the emphasis on bandwidth expansion. Examples and results concerning bandwidth expansion by a factor of 2 and 3 are given.
Keywords :
combined source-channel coding; vector quantisation; PCCOVQ algorithm; bandwidth expansion; direct source-channel mapping; generalized Lloyd algorithm; joint source-channel coding; power-constrained channel-optimized vector quantizer; Bandwidth; Channel capacity; Constraint optimization; Degradation; Delay; Error correction; Merging; Robustness; Signal to noise ratio; Spirals;
Conference_Titel :
Wireless Communication Systems, 2007. ISWCS 2007. 4th International Symposium on
Conference_Location :
Trondheim
Print_ISBN :
978-1-4244-0979-2
Electronic_ISBN :
978-1-4244-0979-2
DOI :
10.1109/ISWCS.2007.4392424
