Accession Number:

ADA445777

Title:

Sensor Synchronization, Geolocation and Wireless Communication in a Shipboard Opportunistic Array

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s):

Report Date:

2006-03-01

Pagination or Media Count:

99.0

Abstract:

A wirelessly networked opportunistic digital array radar WNODAR is an integrated ship wide digital phased array, where the array elements are placed at available open areas over the entire surface of the platform. The array elements are selfstanding digital transmitreceive TR modules with no hardwire connections other than prime power. All control and digitized signals are passed wirelessly between the elements and a central signal processor. This research investigates the problem of integrating the array elements through the design of a wireless synchronization and geolocation network. Phase synchronization of array elements is possible using a simple synchronization circuit. A technical survey of geolocation techniques was performed, and performance curves for the WNODAR operating under different seastate conditions were obtained. Analysis and simulation results suggest that a position location scheme to correct for dynamic effects of hull deflection is not absolutely necessary for an array operating at a VHF or lower UHF frequency. Finally, a design of the demonstration TR module is proposed. Based on projected communication requirements, the full-scale WNODAR demands a 3.7 Gbs data transmission rate. The multi-input multi-output orthogonal frequency division multiplexing MIMO-OFDM approach has been identified as a promising solution to achieve gigabit transmission rates.

Subject Categories:

  • Electrical and Electronic Equipment
  • Active and Passive Radar Detection and Equipment
  • Electricity and Magnetism
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE