On Optimum Power Allocation for Multi-Antenna Wideband Helicopter-to-Ground Communications

Abstract

This paper introduces a generalized version of time-reversed, space-time block codes (TR-STBCs), called GTRSTBCs that operates with non-equal power allocation between two inter-symbol interference (ISI) channels in a 2 transmit, 1 receive antenna helicopter-to-ground radio link. The power allocation is parameterized by rho, the portion of the total available power allocated to channel 1. The criteria for selecting the optimum rho is minimizing the residual mean-squared error at the MMSE equalizer output. GTR-STBC is applied to measured channel impulse responses and a simple statistical channel model. The results show that 1) the optimum value of rho gives the best tradeoff between signal-to-noise ratio and ISI; 2) equal power allocation may not be the optimum power allocation when channel side information is available; and 3) the optimum profile of rho over measured channels is significantly different than from that in statistical channel models.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2014
Accession Number
ADA622040

Entities

People

  • Michael Rice
  • Mohammad Saquib

Organizations

  • Brigham Young University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Altitude
  • Channel Models
  • Channel State Information
  • Communication Channels
  • Communication Systems
  • Filters
  • Frequency
  • Helicopters
  • Intervals
  • Low Altitude
  • Mathematical Models
  • Models
  • Modulation
  • Random Variables
  • Residuals
  • Resource Management
  • Test And Evaluation

Fields of Study

  • Engineering

Readers

  • Operations Research
  • Radio communications and signal processing.

Technology Areas

  • Space