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As a part of the new measurement uncertainty system proposed in the new generation of Geometrical Product Specifications and Verification, the evaluation methods of uncertainties to form errors have been researched in mechanical engineering, which are calculated based on the error propagation principle and statistical concept under certain conditions. In this paper, the evaluation datum is obtained...
In this paper, we propose a RB-SR-HARQ (selective repeat based on reliability) protocol on low density parity check codes, which exploits the estimated bits reliabilities at the output of a decoder to retransmit those unreliable bits. Our scheme improves system performance and minimizes retransmission sizes by only retransmitting those bits which are likely to be in error. We simulate RB-SR-HARQ protocol...
With ICA to realize the blind separation from mixed acoustic targets, an identification method based on SVM is proposed through extracting LPC feature. SVM is employed to compute the output score and k-means algorithm is used as cluster LPC coefficients. Finally targets are identified by hybrid model. Simulation indicates that this method is effective in mixed acoustic targets identification system
With independent component analysis (ICA) to realize the blind separation from mixed acoustic objects, an identification method based on gray correlation analysis (GCA) is proposed through extracting linear prediction coefficient (LPC) feature. It is revealed that LPC is consistently better than wavelet energy feature, ICA is efficient algorithm to estimate the unknown signal level and GCA may reflect...
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