Simulation of a Narrow Bandpass-Limited Satellite Channel

Abstract

The effects of a bandpass-limiting satellite channel, such as a B=25- kHz hard-limiting FLEETSAT channel, on several modulation techniques were simulated. The modulations included BPSK and various forms of QPSK, including offset QPSK and continuous-phase minimum frequency shift keying (MSK). Coherent matched-filter receivers and both uplink and downlink noise were assumed. For a bit error probability of 0.005 and a SNR loss of less than 1 dB caused by the nonlinearity in the FLEETSAT case, the maximum standard data rate R was 19.2 kbps for BPSK but 32 kbps for offset QPSK, MSK and QPSK. Rates of 24 kbps for BPSK and 48 kbps for offset QPSK and MSK were attainable at this same reliability with a SNR degradation of about 4 dB and 2.5 dB, respectively. Larger degradations are expected at lower error rates.

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Document Details

Document Type
Technical Report
Publication Date
Jul 28, 1976
Accession Number
ADA030411

Entities

People

  • Brian E. White

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Amplitude Modulation
  • Bandwidth
  • Communication Systems
  • Computer Simulations
  • Data Rate
  • Electrical Engineering
  • Filters
  • Frequency Shift
  • Matched Filters
  • Military Communications
  • Modulation
  • Modulators
  • Narrowband
  • Phase Shift
  • Satellite Communications
  • Simulations
  • Waveforms

Readers

  • Radio communications and signal processing.

Technology Areas

  • Space