Title :
A high accuracy multi-parameter estimation algorithm for underwater acoustic channels
Author :
Lin, Zhou ; Guang, Yang ; Ming, Li ; Lanjun, Liu ; Jianguo, Wang
Author_Institution :
Coll. of Eng., Ocean Univ. of China, Qingdao, China
Abstract :
A novel pilot signal is proposed for the Doppler shift and the delay estimation in the underwater acoustic multi-path channel. A single-frequency signal and a Chirp signal are sent with a fixed time interval. The energy focusing character is applied to process the single-frequency signal part of the mixed signal for the Doppler shift, while the Chirp-based character of the fractional Fourier transform (FRFT) is applied to analyze the Chirp part of the mixed signal for the delay. Besides, it´s not necessary to correlate a bank of correlators as the result of the FFT of high resolution on the single-frequency signal part of the mixed signal for Doppler shift estimation, which greatly improves the algorithm efficient. The simulation results show the algorithm effectiveness.
Keywords :
chirp modulation; delay estimation; fast Fourier transforms; underwater acoustic communication; Doppler shift estimation; FRFT; chirp signal; delay estimation; energy focusing character; fractional Fourier transform; high accuracy multiparameter estimation algorithm; single-frequency signal; underwater acoustic multipath channel; Chirp; Frequency estimation; Receivers;
Conference_Titel :
Communication Technology (ICCT), 2010 12th IEEE International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6868-3
DOI :
10.1109/ICCT.2010.5688514
