Doppler-shift estimation of flat underwater channel using data-aided least-square approach
In this paper we proposed a dada-aided Doppler estimation method for underwater acoustic communication. The training sequence is non-dedicate, hence it can be designed for Doppler estimation as well as channel equalization. We assume the channel has been equalized and consider only flat-fading chann...
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doaj-4e3b9333ba894d56b1b47dd6ba5e461d2020-11-24T22:17:58ZengElsevierInternational Journal of Naval Architecture and Ocean Engineering2092-67822015-03-017242643410.1515/ijnaoe-2015-0030ijnaoe-2015-0030Doppler-shift estimation of flat underwater channel using data-aided least-square approachWeiqiang Pan0Ping Liu1Fangjiong Chen2Fei Ji3Jing Feng4Information Network Engineering and Research Center, South China University of TechnologySchool of Electronics and Information Engineering, South China University of TechnologySchool of Electronics and Information Engineering, South China University of TechnologySchool of Electronics and Information Engineering, South China University of TechnologySchool of Electronics and Information Engineering, South China University of TechnologyIn this paper we proposed a dada-aided Doppler estimation method for underwater acoustic communication. The training sequence is non-dedicate, hence it can be designed for Doppler estimation as well as channel equalization. We assume the channel has been equalized and consider only flat-fading channel. First, based on the training symbols the theoretical received sequence is composed. Next the least square principle is applied to build the objective function, which minimizes the error between the composed and the actual received signal. Then an iterative approach is applied to solve the least square problem. The proposed approach involves an outer loop and inner loop, which resolve the channel gain and Doppler coefficient, respectively. The theoretical performance bound, i.e. the Cramer-Rao Lower Bound (CRLB) of estimation is also derived. Computer simulations results show that the proposed algorithm achieves the CRLB in medium to high SNR cases.http://www.sciencedirect.com/science/article/pii/S2092678216300905Underwater acoustic communicationDoppler estimationLeast SquareCramer-Rao Lower bound |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Weiqiang Pan Ping Liu Fangjiong Chen Fei Ji Jing Feng |
spellingShingle |
Weiqiang Pan Ping Liu Fangjiong Chen Fei Ji Jing Feng Doppler-shift estimation of flat underwater channel using data-aided least-square approach International Journal of Naval Architecture and Ocean Engineering Underwater acoustic communication Doppler estimation Least Square Cramer-Rao Lower bound |
author_facet |
Weiqiang Pan Ping Liu Fangjiong Chen Fei Ji Jing Feng |
author_sort |
Weiqiang Pan |
title |
Doppler-shift estimation of flat underwater channel using data-aided least-square approach |
title_short |
Doppler-shift estimation of flat underwater channel using data-aided least-square approach |
title_full |
Doppler-shift estimation of flat underwater channel using data-aided least-square approach |
title_fullStr |
Doppler-shift estimation of flat underwater channel using data-aided least-square approach |
title_full_unstemmed |
Doppler-shift estimation of flat underwater channel using data-aided least-square approach |
title_sort |
doppler-shift estimation of flat underwater channel using data-aided least-square approach |
publisher |
Elsevier |
series |
International Journal of Naval Architecture and Ocean Engineering |
issn |
2092-6782 |
publishDate |
2015-03-01 |
description |
In this paper we proposed a dada-aided Doppler estimation method for underwater acoustic communication. The training sequence is non-dedicate, hence it can be designed for Doppler estimation as well as channel equalization. We assume the channel has been equalized and consider only flat-fading channel. First, based on the training symbols the theoretical received sequence is composed. Next the least square principle is applied to build the objective function, which minimizes the error between the composed and the actual received signal. Then an iterative approach is applied to solve the least square problem. The proposed approach involves an outer loop and inner loop, which resolve the channel gain and Doppler coefficient, respectively. The theoretical performance bound, i.e. the Cramer-Rao Lower Bound (CRLB) of estimation is also derived. Computer simulations results show that the proposed algorithm achieves the CRLB in medium to high SNR cases. |
topic |
Underwater acoustic communication Doppler estimation Least Square Cramer-Rao Lower bound |
url |
http://www.sciencedirect.com/science/article/pii/S2092678216300905 |
work_keys_str_mv |
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