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| Title: | Frequency-domain channel estimation and equalization for single carrier underwater acoustic communications | |
| Author (s): | Zheng, Y. Rosa Xiao, Chengshan Yang, T.C. Yang, Wen-Bin | |
| Department/Lab Affiliations: | Electrical and Computer Engineering Intelligent Systems Center Wireless Communications Lab | |
| Keywords: | channel estimation discrete Fourier transforms equalisers hydrophones underwater acoustic communication | |
| Issue Date: | 2007 | |
| Publisher: | Institute of Electrical and Electronics Engineers IEEE | |
| Citation: | Zheng, Y.R., Xiao, C., Yang, T.C., and Yang, W.B. “Frequency-domain channel estimation and equalization for single carrier underwater acoustic communications” Oceans 2007, pp. 1-6. | |
| Abstract: | A new frequency-domain channel estimation and equalization (FDE) scheme is proposed for single carrier (SC) underwater acoustic communications. The proposed SC-FDE employs a small training signal block for initial channel estimation in the frequency domain and converts the estimated transfer function to a desired DFT (discrete Fourier transform) size for channel equalization of the data blocks. The frequency domain equalizer is designed using the linear minimum mean square error criterion. A new phase coherent detection scheme is also proposed and deployed to combat the phase drift due to the instantaneous Doppler in the underwater channels. The channel transfer functions and group-averaged phase drift are re-estimated adaptively in a decision-directed manner for each data block in a packet, which contains M blocks of QPSK data. The proposed SC-FDE method is applied to single input multiple output (SIMO) systems using the experimental data measured off the coast of Panama City, Florida, USA, June 2007. The uncoded bit error rate of the SIMO systems varies between 1.3% to 6.8 x 10^-5 when 4 ~ 8 receive hydrophones are utilized, and the source-receiver range is 5.06 km. | |
| Type: | Article - Conference proceedings text | |
| In Title: | Oceans 2007 | |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. allows publisher's final version to be uploaded FULL COPYRIGHT INFORMATION: | |
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| title | Frequency-domain channel estimation and equalization for single carrier underwater acoustic communications | |
| contributor.author | Zheng, Y. Rosa | |
| contributor.author | Xiao, Chengshan | |
| contributor.author | Yang, T.C. | |
| contributor.author | Yang, Wen-Bin | |
| contributor.deptlab | Electrical and Computer Engineering | |
| contributor.deptlab | Intelligent Systems Center | |
| contributor.deptlab | Wireless Communications Lab | |
| contributor.sponsor | National Science Foundation | |
| contributor.sponsor | Office of Naval Research | |
| subject | channel estimation | |
| subject | discrete Fourier transforms | |
| subject | equalisers | |
| subject | hydrophones | |
| subject | underwater acoustic communication | |
| date.issued | 2007 | |
| publisher | Institute of Electrical and Electronics Engineers IEEE | |
| identifier.citation | Zheng, Y.R., Xiao, C., Yang, T.C., and Yang, W.B. “Frequency-domain channel estimation and equalization for single carrier underwater acoustic communications” Oceans 2007, pp. 1-6. | |
| identifier.pub.URI | ||
| description.abstract | A new frequency-domain channel estimation and equalization (FDE) scheme is proposed for single carrier (SC) underwater acoustic communications. The proposed SC-FDE employs a small training signal block for initial channel estimation in the frequency domain and converts the estimated transfer function to a desired DFT (discrete Fourier transform) size for channel equalization of the data blocks. The frequency domain equalizer is designed using the linear minimum mean square error criterion. A new phase coherent detection scheme is also proposed and deployed to combat the phase drift due to the instantaneous Doppler in the underwater channels. The channel transfer functions and group-averaged phase drift are re-estimated adaptively in a decision-directed manner for each data block in a packet, which contains M blocks of QPSK data. The proposed SC-FDE method is applied to single input multiple output (SIMO) systems using the experimental data measured off the coast of Panama City, Florida, USA, June 2007. The uncoded bit error rate of the SIMO systems varies between 1.3% to 6.8 x 10^-5 when 4 ~ 8 receive hydrophones are utilized, and the source-receiver range is 5.06 km. | |
| type | Article - Conference proceedings | |
| type.DCMIType | text | |
| type.status | Final version | |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. | |
| rights | allows publisher's final version to be uploaded | |
| rights.URI | ||
| rights.URI | ||
| rights.URI | ||
| relation.isPartOf | Oceans 2007 | |
| date.accessioned | 2008-08-01T18:52:30Z | |
| date.available | 2008-08-05T18:40:36Z | |
| identifier.persist.URI | ||
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