Title :
Construction of low-rate power-efficient coding schemes and their application to CDMA
Author :
Huettinger, Simon ; Huber, Johanna
Author_Institution :
Chair of Inf. Transmission, Erlangen-Nurnberg Univ., Erlangen, Germany
Abstract :
We propose a novel design method, which is an extension to the EXIT charts introduced by ten Brink (see IEE Electronics Letters, vol.35, no.10, p. 806-808, 1999), for low-rate power-efficient codes. An exemplary design of a rate -1/4 code shows more than 1 dB more coding gain than the original turbo-code of rate -1/2. Using this code in a CDMA scheme while reducing the spreading by a factor of 2 helps improving the overall performance of the multi-user scheme significantly.
Keywords :
code division multiple access; concatenated codes; convolutional codes; turbo codes; CDMA; EXIT charts; code rate; coding gain; concatenated coding; convolutional codes; low-rate power-efficient coding schemes; multi-user scheme; turbo-code; Convergence; Convolutional codes; Design methodology; Gain; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Multiaccess communication; Thyristors; Turbo codes;
Conference_Titel :
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
Print_ISBN :
0-7803-7632-3
DOI :
10.1109/GLOCOM.2002.1188349
