Thesis
OFDM-constrained capacity of the underwater communication channel
Washington State University
Master of Science (MS), Washington State University
2010
Handle:
https://hdl.handle.net/2376/100447
Abstract
A discrete-time, band-pass, single-input multiple-output (SIMO) fading channel is used to model a shallow underwater acoustic communication channel. Discrete-time measured channel responses obtained from real lake tests are used to develop a discrete-time, baseband, complex-valued equivalent channel model, through matched filtering and minimum mean-square error (MMSE) estimation. To obtain the orthogonal frequency-division multiplexing (OFDM) channel model from broad-band SIMO fading channel model, zero-padded OFDM is applied directly to the equivalent shallow-water channel model. Several other reference channel models and the associated channel capacities are compared. Then, several estimators of the OFDM-constrained channel capacities are introduced. Estimates of OFDM-constrained capacity of the underwater acoustic channel are developed. The empirical results are obtained based on the discrete-time channel impulse response models derived from underwater transmission measurements. The influence of parameters of each method on the channel capacity is discussed and the channel capacity estimates are compared. Outage probabilities are determined for the SIMO channel model. The SIMO fading channel can perform much better than the single input, single output (SISO) fading channel.
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Details
- Title
- OFDM-constrained capacity of the underwater communication channel
- Creators
- Yingying Zhu
- Contributors
- Thomas R. Fischer (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525188901842
- Language
- English
- Resource Type
- Thesis