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| Blind Estimation Algorithm of the Linear Block Codes Parameters Based on WHT |
| Yang Xiao-wei①② Gan Lu① |
①(Department of Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China)
②(National Laborotory of Information Control Technology for Communication System, Jiaxing 314033, China) |
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Abstract A new approach is presented for blind estimation of linear block codes parameters with noisy data. Firstly, the proposed method exploits the statistical properties of the dual codes and Walsh-Hadamard transform to determine whether a code is belong to dual code or not. Meanwhile, from the principle of “3 standard deviation”, a theoretical threshold to distinguish dual codes is induced. Then the code length and synchronization are estimated when the normalized dual space dimension reaches the maximum. Finally, the parity-check matrix is recovered by the dual codes. Computer simulation results show that the proposed method can provide good performance even when the bit error rate is 0.03.
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Received: 09 December 2011
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Corresponding Authors:
Gan Lu
E-mail: ganlu@uestc.edu.cn
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2012, Vol. 34 
