Title :
Semi-Iterative Analog Turbo Decoding
Author :
Arzel, Mattieu ; Lahuec, Cyril ; Seguin, Fabrice ; Gnaedig, David ; Jézéquel, Michel
Author_Institution :
Ecole Nat. Superieure des Telecommun., Brest
fDate :
6/1/2007 12:00:00 AM
Abstract :
Based on multiple-slice turbo codes, a novel semi-iterative analog turbo decoding algorithm and its corresponding decoder architecture are presented. This work paves the way for integrating flexible analog decoders dealing with frame lengths over thousands of bits. The algorithm benefits from a partially continuous exchange of extrinsic information to improve decoding speed and correction performance. The proposed algorithm and architecture are applied to design an analog decoder for double-binary codes. Taking full advantage of multiple slice codes, the on-chip area is shown to be reduced by ten when compared to a conventional fully parallelized analog slice turbo decoder. The reconfigurable analog core area for frames of 40 bits up to 2432 bits is 37 nm2 in a 0.25-mum BiCMOS process.
Keywords :
BiCMOS analogue integrated circuits; binary codes; interleaved codes; iterative decoding; turbo codes; BiCMOS process; decoder architecture; extrinsic interleavers; integrating flexible analog decoders; multiple-slice turbo codes; semiiterative analog turbo decoding; size 0.25 mum; Algorithm design and analysis; Analog-digital conversion; BiCMOS integrated circuits; Decoding; Digital video broadcasting; Digital-analog conversion; Energy consumption; Hardware; Interleaved codes; Turbo codes; Analog decoding; multiple-slice turbo codes; turbo codes;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2007.897770