A satellite is a telecommunications device in orbit around the Earth. Satellite communications utilizes radio freqencies as the communications meduim and uses satellites to receive, amplify and retransmit an earth-based station's uplink signal back down to a receiving earth station.

It is important to remember that all satellite communication is simplex--that is, the uplink and downlink are separated. All satellite connections are handled separately and frequently sold and purchased as separate services.

BASICS

THE RF CIRCUIT

  • Uplink / Downlink Chains
  • Power
  • Interference
    • Noise
      • Carrier to Noise Ratio
      • Signal To Noise Ratio
      • Noise Floor
      • Noise temperature
    • Spectrum Interferance
    • Intermodulation
    • Harmonic Distortion
  • Attenuation
    • Rain Fade
    • Atmospheric Absorbption
    • Impedance
  • Gain
    • Antenna Gain
    • Amplifier Gain
      • Gain over Temperature (G/T)
      • Effective Output Power
  • Voltage Standing Wave Ratio (VSWR)
  • Free space loss
  • Backoff

MODULATION

  • PSK - Phase Shift Keying
    • BPSK
    • QPSK
    • nPSK
    • Concentric PSK
  • QAM - Quadrature Amplitude Modulation

Multiplexing

  • OFDM - Orthogonal Frequency Division Multiplexing

ERROR CORRECTION

  • Forward Error Correction

Convolutional CODING (Line Coding Technologies)

  • Viterbi
  • Reed Solomon

DIGITAL SERVICES

  • Single Channel Per Carrier (SCPC)
  • Multiple Channels Per Carrier (MCPC)
  • Digital Video Broadcast (DVB)

EARTH STATION EQUIPMENT

UPLINK CHAIN

  • Data Source (Router)
  • Modulator
  • Up-Converter
  • Amplifiers
  • Wave Guide
    • Baseball Switch
  • Dish
    • Antenna
    • Feed Horn
    • Mesh vs. Solid

DOWNLINK CHAIN

  • Antenna (Dish)
  • Low Noise Amplifier (LNA)
  • Low Noise Block Downconverter (LNB)
  • Down-Converter
  • Demodulator
  • Data Destination

Bookmark this page and SHARE:  

Search

Support InetDaemon.Com

Get Tutorials in your INBOX!

Free Training