Characterization and Modeling of Underwater Acoustic Communications Channels for Frequency-Shift-Keying Signals

Abstract

In a fading channel, bit error rate for frequency-shift- keying signals is determined predominantly by the envelope amplitude fading statistics of the signal. The narrowband envelope amplitude distributions are measured from the TREX04 data (as a function of frequency) using M-sequence signals centered at 17 kHz with a 5 kHz bandwidth. The results do not fit the Rayleigh, Rician, Nakagami m-distributions. In contrast, we find that the data are fitted well by a K-distribution. We also analyze the data in terms of long-term and short-term statistics. The long-term and short-term fading statistics are well fitted by the lognormal distribution and Rayleigh distribution respectively, choosing the average time scale to be ~0.2 sec. The joint probability distribution function of a lognormal and the Rayleigh distribution is approximately the K-distribution.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2006
Accession Number
ADA498003

Entities

People

  • T C Yang
  • Wen-bin Yang

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Communications
  • Bandwidth
  • Communication Channels
  • Distribution Functions
  • Doppler Effect
  • Frequency
  • Frequency Bands
  • Frequency Shift
  • Probability
  • Probability Distribution Functions
  • Probability Distributions
  • Random Variables
  • Statistical Distributions
  • Statistics
  • Transfer Functions
  • Underwater Acoustic Communications
  • Underwater Communications

Readers

  • Acoustical Oceanography.
  • Computational Modeling and Simulation
  • Radio communications and signal processing.