Time-Reversal Based Range Extension Technique for Ultra-Wideband (UWB) Sensors and Applications in Tactical Communications and Networking

Abstract

This report summarizes our research and development work in the last quarter of year 2008. We have reached a practical limit in terms of sampling rate and bandwidth. Listed below are major achievements during the quarter: (1) improved waveform generator: FPGA coding with respect to readability, quantization at the transmitter has been increased from ternary to 8-bit, and sampling rate has been increased from 500 Ms/s to 1 Gs/s; (2) I/Q quadrature modulation/ upconversion, instead of single-channel; (3) Xilinx Virtex 5 LXT board at the receiver with new high speed connection to the A/D; (4) variable thresholds for various signal levels; (5) 10-dB Bandwidth up to 800 MHz; (6) multiple bit rates: 6.25, 3.125, and 1.5625 Mb/s; (7) improved receiver sensitivity. Our next milestone, a gain of several dB over ordinary non-time-reversal system, is anticipated, and system trials will be reported in the April report.

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Document Details

Document Type
Technical Report
Publication Date
Jan 16, 2009
Accession Number
ADA498474

Entities

People

  • Nan Guo
  • Peng Zhang
  • Robert C. Qui
  • Yu Song
  • Zhen Hu

Organizations

  • Tennessee Technological University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Bandwidth
  • Converters
  • Data Processing
  • Detectors
  • Digital Data
  • Frequency
  • Frequency Bands
  • Generators
  • Modulation
  • Radio Equipment
  • Sampling
  • Shift Registers
  • Transmitters
  • Waveform Generators
  • Waveforms
  • Waves

Readers

  • Parallel and Distributed Computing.
  • Radio communications and signal processing.
  • Technical Research and Report Writing.