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Extrinsic data compression method for double-binary turbo codes

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5 Author(s)
Ou-Yang, Yi-Huan ; Department of Electronics Engineering and Institute of Electronics, National Chiao Tung University, Hsin-Chu, Taiwan ; Kao, Chien-Yu ; Jen-Yuan Hsu ; Pang-An Ting
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This paper presents an extrinsic data compression method for double-binary turbo codes. Frame and extrinsic data memory occupy more area in turbo decoder implementations with the frame size increasing. Besides, non-binary turbo codes have much more extrinsic memory usage than single-binary turbo codes. This proposed compression method utilizes an operation in radix-4 single-binary turbo decoder and also can simplify the integration of single and double-binary turbo decoders in hardware implementations. It can reduce one-third of extrinsic memory size, about 15% of total memory usage. Simulation results show that this method only causes 0.2dB performance loss when bit error rate is equal to 10−5 with slight hardware increment.

Published in:

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Date of Conference:

20-23 May 2012

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