TIME-VARYING WIDEBAND UNDERWATER ACOUSTIC CHANNEL ESTIMATION FOR OFDM COMMUNICATIONS

被引：9
|
作者：
Josso, N. F. [1 ]
Zhang, J. J. [2 ]
Fertonani, D. [2 ]
Papandreou-Suppappola, A. [2 ]
Duman, T. M. [2 ]
机构：
[1] Grenoble Inst Technol, GIPSA Lab DIS, Grenoble, France
[2] Arizona State Univ, SenSIP Ctr, Sch ECEE, Tempe, AZ 85287 USA
来源：
2010 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING | 2010年
关键词：
Underwater acoustic channel; wideband spreading function; channel estimation; OFDM;
D O I：
10.1109/ICASSP.2010.5495257
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
We investigate two methods for estimating the matched signal transformations caused by time-varying underwater acoustic channels in orthogonal frequency division multiplexing (OFDM) communication systems. The underwater acoustic channel for this 12-20 kHz medium frequency range OFDM system is best modeled using multipath and wide-band Doppler scale changes on the transmitted signal. As a result, our first channel estimation method is based on discretizing the wideband spreading function time-scale representation of the channel output using the Mellin transform. The second method is based on extracting the time-scale features of distinct ray paths in the received signal using a modified matching pursuit decomposition algorithm. We validate and discuss both methods using data from the recent Kauai Acomms MURI 2008 (KAM08) underwater acoustic communication experiment.
引用
收藏
页码：5626 / 5629
页数：4
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