TREA

Frequency-division multiplex systems

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Industry

  • CPC
  • H04J1/00
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Parent Industries

HELECTRICITY H04Electric communication H04JMULTIPLEX COMMUNICATION

Current Industry

H04J1/00Frequency-division multiplex systems

Sub Industries

H04J1/02Details H04J1/04Frequency-transposition arrangements H04J1/045Filters applied to frequency transposition H04J1/05using digital techniques H04J1/06Arrangements for supplying the carrier waves Arrangements for supplying synchronisation signals H04J1/065Synchronisation of carrier sources at the receiving station with the carrier source at the transmitting station H04J1/08Arrangements for combining channels H04J1/085Terminal station; Combined modulator and demodulator circuits H04J1/10Intermediate station arrangements H04J1/12Arrangements for reducing cross-talk between channels H04J1/14Arrangements providing for calling or supervisory signals H04J1/16Monitoring arrangements H04J1/18in which all the carriers are amplitude-modulated H04J1/20in which at least one carrier is angle-modulated
Industries

Patents Grantslast 30 patents

Patents Applicationslast 30 patents