Editor/Reviewer loginFrequency : 12 issues per year
Subject : Computer Applications and Technology
ISSN : 2319–8656 (Online)
IJCATR Volume 11 Issue 3
Modified Algorithm Based on Quadratic Correlation Time Delay Estimation
Zheng Jing, Yu-Zheng Zheng, Jian-Yu Meng
10.7753/IJCATR1103.1006
keywords : Time delay estimation ;Reverberation; Homomorphic filter; Quadratic cross-correlation; Hilbert
In the passive positioning system, the traditional generalized cross-correlation algorithm estimates the effect under the influence of noise and reverberation, while the delay estimation algorithm after homomorphic filtering reduces the anti-reverb ability of the cross-correlation algorithm, but also reduces the cross-correlation of the signal, resulting in the decrease in the noise resistance of the cross-correlation algorithm. Based on this, the quadratic cross-correlation operation of the full-pass component of the signal is performed after homomorphic filtering to improve its noise immunity. In addition, the Introduction of Hilbert Difference sharpens the secondary cross-correlation peaks to make peak detection that reflects the time delay more accurate. Experimental simulation shows that the proposed method can effectively suppress the influence of noise and reverberation in non-stationary speech signals, and improve the performance of delay estimation.
@artical{z1132022ijcatr11031006,
Title = "Modified Algorithm Based on Quadratic Correlation Time Delay Estimation",
Journal ="International Journal of Computer Applications Technology and Research(IJCATR)",
Volume = "11",
Issue ="3",
Pages ="82 - 87",
Year = "2022",
Authors ="Zheng Jing, Yu-Zheng Zheng, Jian-Yu Meng"}
The basic delay estimation algorithm is improved in this paper.
The algorithm in this paper combines the advantages of Hilbert and homomorphic filtering.
The algorithm uses the mean square error to evaluate the performance of the algorithm.
In the simulation, a performance evaluation of the algorithm is carried out.