Skip to content
TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Symbols and abbreviations
  • 4 General
  • 5 Data modulation for the 3.84 Mcps and 7.68Mcps options
    • 5.1 Symbol rate
    • 5.2.1 Mapping for burst type 1 and 2
    • 5.2.2 Mapping for burst type 3
    • 5.2.3 Mapping for 3.84 Mcps MBSFN IMB
    • 5.2 Mapping of bits onto signal point constellation
    • 5A Data modulation for the 1.28 Mcps option
      • 5A.1 Symbol rate
      • 5A.2.1 QPSK modulation
      • 5A.2.2 8PSK modulation
      • 5A.2.3 16QAM modulation
      • 5A.2.4 64QAM modulation
      • 5A.2 Mapping of bits onto signal point constellation
      • 6 Spreading modulation
        • 6 Spreading modulation
        • 6.1 Basic spreading parameters
        • 6.2 Channelisation codes
        • 6.3 Channelisation Code Specific Multiplier
        • 6.4 Scrambling codes for the 3.84Mcps and 1.28Mcps options
        • 6.4a Scrambling codes for the 7.68Mcps option
        • 6.5 Spread signal of data symbols and data blocks
        • 6.6 Modulation for the 3.84Mcps and 7.68Mcps options
        • 6.7 Modulation for the 1.28 Mcps option
        • 6.8 Spreading modulation for the 3.84 Mcps MBSFN IMB option
      • 7 Synchronisation codes for the 3.84 Mcps option
      • 7A Synchronisation codes for the 7.68 Mcps option
      • 8 Synchronisation codes for the 1.28 Mcps option
      • 9 Cell synchronisation codes
      • B.1 Alternative generation

      5A.1 Symbol rate

      25.2233GPPRelease 17Spreading and modulation (TDD)TS

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

      The symbol duration TS depends on the spreading factor Q and the chip duration TC: Ts = Q  Tc, where Tc = .