Laser Transceiver Electronics 1

Abstract

A Laser Transceiver Electronics system was developed for use in an Air Force Program 405B brassboard 1 Gb/s laser communication system using quadraphase shift key modulation on a single-frequency laser. This system contains a data source system, BER measurement system, 1 Gb/s QPSK modulator plus 100 kb/sPSK modulator, 1 Gb/s QPSK demodulator plus 100 kb/sPSK downconverter, and two each 500 Mb/s bit synchronizer-signal conditioners (BSSC) . Synchronous combined modem-BSSC performance at 1 Gb/s is within 1.3 dB of the nonbandlimited PSK theoretical curve for BER's to 10 to the minus 6th power over an automatic gain control range of 20 dB and with the 100 kb/s telemetry present. Nonsynchronous performance for close bit rates is within 0.2 dB of the synchronous curve. Eb/No on the downconverted telemetry IF output ranges from 20 to 30 dB for a wideband Eb/No range of 2 to 14 dB at the demodulator imput. The conclusion is that 1 Gb/s QPSK signal processing has advanced to a state where operational hardware is practical.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1973
Accession Number
AD0912780

Entities

People

  • James S. Gray

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Amplifiers
  • Automatic Gain Control
  • Communication Systems
  • Demodulators
  • Department Of Defense
  • Detectors
  • Electronics
  • Frequency
  • Measurement
  • Modulation
  • Modulators
  • Performance Tests
  • Radiation
  • Signal Processing
  • Telemetry
  • Test And Evaluation

Fields of Study

  • Physics

Readers

  • Radio communications and signal processing.

Technology Areas

  • Directed Energy
  • Microelectronics