Parameter study of OFDM underwater communications system

Author

Kim, Byung-Chul ; Lu, I-Tai

Author_Institution

Center for Adv. Technol. in Telecommun., Polytech. Univ., Farmingdale, NY, USA

Volume

2

fYear

2000

fDate

2000

Firstpage

1251

Abstract

Design criteria and analysis procedures for a practical OFDM underwater communications system are presented. A new broadband underwater channel model with Doppler time scaling effect is developed. A two-dimensional MMSE scheme using time and frequency pilots is employed for channel estimation. Doppler frequency shift is estimated using cyclic prefix and is compensated by a digital sampling rate conversion procedure. Numerical simulations demonstrate that the OFDM technique is robust with respect to frequency selectivity and time selectivity

Keywords

Doppler shift; OFDM modulation; broadband networks; compensation; frequency estimation; least mean squares methods; underwater acoustic communication; Doppler frequency shift; Doppler time scaling effect; OFDM underwater communications system; analysis procedures; broadband underwater channel model; channel estimation; cyclic prefix; design criteria; digital sampling rate conversion procedure; frequency selectivity; time selectivity; two-dimensional MMSE scheme; Acoustic propagation; Bandwidth; Channel estimation; Doppler shift; Frequency estimation; Narrowband; OFDM; Sea surface; Underwater acoustics; Underwater communication;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS 2000 MTS/IEEE Conference and Exhibition

Conference_Location

Providence, RI

Print_ISBN

0-7803-6551-8

Type

conf

DOI

10.1109/OCEANS.2000.881774

Filename

881774