DocumentCode :
1642446
Title :
A novel state metric normalization technique for high-throughput maximum-a-posteriori-probability decoder
Author :
Shrestha, Ranjay ; Paily, Roy
Author_Institution :
Dept. of Electr. & Electron. Eng., Indian Inst. of Technol. Guwahati, Guwahati, India
fYear :
2013
Firstpage :
903
Lastpage :
907
Abstract :
In this paper, a new state metric normalization technique is proposed for maximum-a-posteriori-probability (MAP) algorithm to enhance the throughput of MAP decoder. Bit-error-rate (BER) performance comparison showed that the MAP algorithm based on the proposed normalization technique has a coding gain of 0.25 dB at a BER of 10-4 in comparison with MAP algorithm based on the subtractive normalization technique. An architecture for MAP decoder based on the new normalization technique has been proposed with a reduced critical path delay as compared to the contributions in literature. Subsequently, a field-programmable-gate-array (FPGA) implementation of the new MAP decoder is carried out. Thereby, the proposed decoder based on non-parallel radix-2 and radix-4 architectures are able to achieve high throughputs of 514 Mbps and 1.028 Gbps respectively.
Keywords :
decoding; error statistics; field programmable gate arrays; BER performance; FPGA implementation; MAP algorithm; MAP decoder; bit error rate; critical path delay; field programmable gate array; high throughput maximum a posteriori probability decoder; maximum a posteriori probability algorithm; radix-2 architectures; radix-4 architectures; state metric normalization technique; Clocks; Computer architecture; Decoding; Delays; Field programmable gate arrays; Throughput; ASIC; BER performance; FPGA; MAP algorithm; maximum clock frequency; throughput; turbo code;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advances in Computing, Communications and Informatics (ICACCI), 2013 International Conference on
Conference_Location :
Mysore
Print_ISBN :
978-1-4799-2432-5
Type :
conf
DOI :
10.1109/ICACCI.2013.6637296
Filename :
6637296
Link To Document :
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