Combating Synchronization Errors in Cooperative Relays

Abstract

Cooperative relays have recently been proposed and studied for mobile ad hoc networks. It has been shown that under perfect symbol synchronization, parallel relays with space-time modulation can yield more than 10dB power savings over conventional serial relays in a highly mobile environment. In this paper, we analyze the effect of synchronization errors on the performance of parallel relays, and also study several effective methods to reduce the negative impact of synch errors. Our study shows that when the synch errors are much smaller than a symbol interval, the performance of parallel relays deteriorates gracefully. We have also found that well designed space-time coding techniques such as TR-STC and ST-OFDM can be highly effective in combating large synch errors with only marginal reduction of data rate.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2005
Accession Number
ADA533171

Entities

People

  • Ananthram Swami
  • Babak Daneshrad
  • Yan Mei
  • Yingbo Hua

Organizations

  • University of California, San Diego

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ad Hoc Networks
  • Data Rate
  • Detection
  • Detectors
  • Electrical Engineering
  • Energy Consumption
  • Engineering
  • Frequency
  • Frequency Division Multiplexing
  • Frequency Domain
  • Mesh Networks
  • Military Research
  • Mobile Ad Hoc Networks
  • Orthogonal Frequency Division Multiplexing
  • Signal Processing
  • Transmitters
  • Transmitting

Readers

  • Computer Programming and Software Development.
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Systems Analysis and Design

Technology Areas

  • Space