Iterative Block Decision Feedback Equalization for MIMO Underwater Acoustic Communications

Abstract

A new receiver design using iterative block decision-feedback equalizer (BDFE) is proposed for high data rate single-carrier multiple-input, multiple-output (MIMO) underwater acoustic (UWA) communications. The adoption of BDFE enables a sequence-based log-likelihood ratio (LLR) calculation during iterative equalization, thus leading to better performance and faster convergence than existing low-complexity iterative equalization methods using symbol-based LLR evaluation. The proposed BDFE method is applied to overlapped blocks to reduce performance degradation at the tail of each block. The block size is flexibly selected depending on the practical channel condition. The proposed receiver scheme has been tested by extensive experimental data and proved to be robust to different transmission environments with consistently good detection performance. Data from collected during the SPACE08 experiment near Martha's Vineyard and the GOMEX08 experiment at the Gulf of Mexico, are both presented here.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2010
Accession Number
ADA527579

Entities

People

  • Chengshan Xiao
  • Jun Tao
  • T C Yang
  • Yahong R. Zheng

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Acoustic Communications
  • Carrier Frequencies
  • Computational Complexity
  • Data Processing
  • Data Rate
  • Decoders
  • Detection
  • Equalization
  • Frequency
  • Frequency Domain
  • Hydrophones
  • Military Research
  • Modulation
  • Multiple Input Multiple Output
  • Orthogonal Frequency Division Multiplexing
  • Time Domain
  • Transducers

Fields of Study

  • Engineering

Readers

  • Distributed Systems and Data Platform Development
  • Radio communications and signal processing.
  • Statistical inference.