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TechSpec
  • 1 Scope
  • 2 References
  • 3 Definitions and Abbreviations
  • 4 General
  • 5 The problem
  • 6 The goals and objectives
  • 7 Text Telephony architecture based upon CTM
  • 8 Technical description of CTM
    • 8.1 Overview
    • 8.2 CTM transmitter
      • 8.2.1 Character set
      • 8.2.2 FEC error protection
      • 8.2.3 CTM burst structure
      • 8.2.4 Periodic muting and insertion of resynchronization sequence
      • 8.2.5 Interleaver and synchronization preamble
      • 8.2.6 CTM modulator
      • 8.2.7 Switching between speech and data
    • 8.3 CTM receiver
  • 9 CTM negotiation and inband signaling
  • 10 Functions in the CTM environment

8.3 CTM receiver

26.2263GPPCellular text telephone modemGeneral descriptionRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

One possible implementation of the CTM Receiver is provided in Annex A for guidance. No normative bit exact C-code is provided in order to allow implementation freedom and further improvements. Test sequences and minimum performance requirements for the CTM receiver are provided in [1].