Title :
Multipath time-delay estimate based on homomorphic filtering in logarithm domain
Author :
Zhang Yao ; Ji Da-xiong ; Wu Jian-guo ; Gao Lei
Author_Institution :
State Key Lab. of Robot., Shenyang Inst. of Autom., Shenyang, China
Abstract :
It is important to estimate the multipath time delay in underwater communication and target positioning. Based on the good time delay resolution, wideband signal is used to estimate time delay conventionally, in some situation, it is hard to use wideband signals. Focused on the narrowband signal multipath time delay estimating, an algorithm based on spectral subtraction in logarithm domain was proposed. Compared to the complex cepstrum method, the proposed method effectively improved the anti-noise ability and adapted better to the doppler frequency shift of the signal.
Keywords :
acoustic signal processing; delay estimation; filtering theory; signal resolution; underwater acoustic communication; Doppler frequency shift; complex cepstrum method; homomorphic filtering; logarithm domain; narrowband signal multipath time delay estimation; spectral subtraction; target positioning; time delay resolution; underwater communication; wideband signal; Cepstrum; Delay effects; Estimation; Filtering; Signal to noise ratio; Transforms; estimate; homomorphic filtering; logarithm domain; time delay;
Conference_Titel :
OCEANS 2014 - TAIPEI
Conference_Location :
Taipei
Print_ISBN :
978-1-4799-3645-8
DOI :
10.1109/OCEANS-TAIPEI.2014.6964320
