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| Efficient Implementing of LDPC Decoding Algorithm Based on Quantization |
| Ma Zhuo Du Shuan-yi Wang Xin-mei |
| The State Key Lab of Integrated Service Networks, Xidian University, Xi’an 710071, China |
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Abstract An implementing scheme of sum-product algorithm is proposed based on 2-dimation broken line approach, which avoids the look-up table with size related to the exponential of the number of quantization bits and reduces the memory consumption of the decoder. Then, an algorithm called second-minimum value corrected min-sum algorithm is proposed based on the implementing scheme proposed above. The algorithm use three 2-dimension piecewise approach to correct the min-sum algorithm and its performance is very close to that of the floating point sum-product algorithm. The correction process of this algorithm just includes simple arithmetic and logic operations, which is easy to be implemented by FPGA.
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Received: 14 January 2011
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Corresponding Authors:
Ma Zhuo
E-mail: zma@mail.xidian.edu.cn
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2011, Vol. 33 
