Title :
A fast serial Viterbi decoder ASIC for CDMA cellular base station
Author :
Kong, Jun Jin ; Park, Yong Woo ; Kim, Min-Goo ; Kim, Youngky ; Jeung, Yeun-Cheul
Author_Institution :
ASIC Center Corp. Tech. Operations, Samsung Electon. Co. Ltd., South Korea
Abstract :
A fast serial Viterbi decoder (FSVD) ASIC for a base station channel card in IS-95 direct sequence-code division multiple access (DS-CDMA) has been developed using 0.8 μm CMOS technology of Samsung. To reduce the decoding time and store path metrics, four add-compare-select (ACS) pairs with several internal SRAMs and one external 6 K byte SRAM are used, respectively. Decoding depth of FSVD is variable to get the better coding gain. It is shown that the proposed scheme can reduce decoding time considerably more than other schemes
Keywords :
CMOS digital integrated circuits; Viterbi decoding; application specific integrated circuits; cellular radio; code division multiple access; digital signal processing chips; land mobile radio; spread spectrum communication; telecommunication channels; 0.8 mum; CDMA cellular base station; CMOS technology; FSVD; IS-95 direct sequence-code division multiple access; add-compare-select pairs; base station channel card; coding gain; decoding time; external 6 K byte SRAM; fast serial Viterbi decoder ASIC; internal SRAMs; path metrics; Application specific integrated circuits; Base stations; CMOS technology; Convolutional codes; Cyclic redundancy check; Decoding; Modulation coding; Multiaccess communication; Parallel processing; Viterbi algorithm;
Conference_Titel :
TENCON '96. Proceedings., 1996 IEEE TENCON. Digital Signal Processing Applications
Conference_Location :
Perth, WA
Print_ISBN :
0-7803-3679-8
DOI :
10.1109/TENCON.1996.608836
