Abstract
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 wideband 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 experi0ment.
| Original language | English (US) |
|---|---|
| Title of host publication | 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Proceedings |
| Pages | 5626-5629 |
| Number of pages | 4 |
| DOIs | |
| State | Published - Nov 8 2010 |
| Event | 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Dallas, TX, United States Duration: Mar 14 2010 → Mar 19 2010 |
Publication series
| Name | ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings |
|---|---|
| ISSN (Print) | 1520-6149 |
Other
| Other | 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 |
|---|---|
| Country/Territory | United States |
| City | Dallas, TX |
| Period | 3/14/10 → 3/19/10 |
Keywords
- Channel estimation
- OFDM
- Underwater acoustic channel
- Wideband spreading function
ASJC Scopus subject areas
- Software
- Signal Processing
- Electrical and Electronic Engineering