Title :
On symbol-based turbo codes for cdma2000
Author :
Khaleghi, F. ; Khandani, A. ; Secord, N. ; Gutierrez, A.
Author_Institution :
Nortel Networks, Canada
Abstract :
Turbo codes have enjoyed a great attention. Among different soft-output decoding algorithms of turbo codes only maximum a posteriori (MAP) decoding as an iterative soft-output decoder (BCJR) allows for achieving an acceptable BER performance at Eb/No levels within only 1 dB of the value corresponding to the Shannon capacity. The drawback of the MAP algorithm is the excessive memory required. Here, we investigate the so-called symbol-based turbo codes. These codes allow for a reduced required memory by 30% for the BCJR method
Keywords :
cellular radio; code division multiple access; error statistics; maximum likelihood decoding; turbo codes; BCJR method; BER performance; MAP decoding; cdma2000; iterative soft-output decoder; maximum a posteriori decoding; soft-output decoding algorithms; symbol-based turbo codes; Bit error rate; Computational modeling; Convolutional codes; Decoding; History; Interleaved codes; Merging; Proposals; Read-write memory; Turbo codes;
Conference_Titel :
Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5668-3
DOI :
10.1109/WCNC.1999.797870
