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  1. 26 Mar, 2024 3 commits
  2. 06 Mar, 2024 1 commit
  3. 29 Feb, 2024 1 commit
  4. 26 Oct, 2023 1 commit
  5. 28 Apr, 2023 1 commit
  6. 06 Sep, 2022 1 commit
  7. 05 Sep, 2022 2 commits
  8. 04 Aug, 2022 1 commit
  9. 28 Apr, 2022 2 commits
  10. 10 May, 2021 1 commit
  11. 06 May, 2021 1 commit
  12. 01 Feb, 2021 1 commit
  13. 21 Dec, 2020 1 commit
    • dir's avatar
      NR_SC_FDMA changes · a17f0078
      dir authored
      - CDM groups used, multiple DMRS locations tested
      - REMOVED compiler define NR_SC_FDMA
      - enabled -Z option in ulsim for testing NR SC-FDMA
      - Gnb UL Processing of LLRS even if last symbol allocated has no data
      - transform precoding Enumerations used
      a17f0078
  14. 05 Nov, 2020 1 commit
  15. 12 Oct, 2020 1 commit
  16. 31 Aug, 2020 1 commit
    • Parminder Singh's avatar
      Enable PTRS with command line in ULSIM · 14096886
      Parminder Singh authored
      - To enable PTRS use -T flag followed by 3 integers
      - Example: ./nr_ulsim -T 2 0 2
      - 1st Value is the list of arguments -> e.g. 2
      - 2nd Value is for L_PTRS{0,1,2}     -> e.g. 0
      - 3rd Value is for K_PTRS{2,4}       -> e.g. 2
      14096886
  17. 27 Aug, 2020 1 commit
    • Parminder Singh's avatar
      Common Phase error estimation and compensation in uplink. · b288eafd
      Parminder Singh authored
      FEATURE STATEMENT:
      - Introduce linear phase error noise model in Uplink at UE
      - Perform common phase error (CPE) estimation and compensation at gNB
      
      SOLUTION:
      - A linear phase shift model is introduced in simulation.
      - PTRS symbols are used to perform estimation of CPE from DMRS compensated signal
      - The estimated values are interpolated in time domain and signal is compensated for the CPE.
      - PTRS processing is done in Frequency Domain for each symbol in a slot and
        LLR's are calculated for each symbol accordingly.
      
      IMPLEMENTATION:
      * sim.h/channle_sim.c
      - Linear Phase Noise Generation model definition.
      * nr_ul_channel_estimation.c/nr_ul_estimation.h
      - CPE estimation from PTRS and DMRS compensated signal.
      * nr_dmrs_rx.c/nr_refsig.h
      - Regenerate PTRS symbols at gNB.
      * nr_ulsch_demodulation.c
      - Removed old PTRS processing code and move to a common PTRS processing function
      * defs_gNB.h/init.c
      - New PTRS variables definition and initialization
      * nr_ulsch_ue.c
      - Corrected PTRS parameter to get new PTRS symbols for each OFDM symbol
      
      TESTING
      * ulsim.c
      - Added Phase noise, Enable PTRS signal and verified the output.
      
      VERIFICATION
      - The LLR are rotated back with estimated CPE and no error is observed in scrambling/decoding
      b288eafd
  18. 06 Aug, 2020 1 commit
  19. 08 May, 2020 2 commits
  20. 07 May, 2020 2 commits
  21. 04 May, 2020 1 commit
  22. 29 Apr, 2020 1 commit
  23. 24 Mar, 2020 1 commit
  24. 13 Mar, 2020 1 commit
  25. 06 Mar, 2020 1 commit
  26. 18 Dec, 2019 1 commit
  27. 08 Oct, 2019 1 commit
    • Ahmed Hussein's avatar
      channel estimation, compensation, etc .. · 3a8bf560
      Ahmed Hussein authored
      Added the following folder:
      - ../openair1/PHY/NR_ESTIMATION/
      
      Added the following file to CMakelists.txt:
      - ../openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
      
      Added the following functions:
      - nr_pusch_dmrs_rx
      - nr_gold_pusch
      - nr_ulsch_channel_level
      - nr_ulsch_channel_compensation
      - nr_ulsch_scale_channel is commented out (I think only used for downlink)
      
      Changes from Khalid Ahmed Mahmoud Mohamed:
      - nr_pusch_channel_estimation is used
      - nr_ulsch_scale_channel is used
      - nr_ulsch_channel_level is used
      - nr_ulsch_channel_compensation is used
      - multiple logging options for channel and signal magnitude
      3a8bf560
  28. 10 Sep, 2019 1 commit
  29. 23 Aug, 2019 1 commit
    • Ahmed Hussein's avatar
      channel estimation, compensation, etc .. · abfd0723
      Ahmed Hussein authored
      Added the following folder:
      - ../openair1/PHY/NR_ESTIMATION/
      
      Added the following file to CMakelists.txt:
      - ../openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
      
      Added the following functions:
      - nr_pusch_dmrs_rx
      - nr_gold_pusch
      - nr_ulsch_channel_level
      - nr_ulsch_channel_compensation
      - nr_ulsch_scale_channel is commented out (I think only used for downlink)
      
      Changes from Khalid Ahmed Mahmoud Mohamed:
      - nr_pusch_channel_estimation is used
      - nr_ulsch_scale_channel is used
      - nr_ulsch_channel_level is used
      - nr_ulsch_channel_compensation is used
      - multiple logging options for channel and signal magnitude
      abfd0723
  30. 07 Feb, 2019 1 commit
  31. 07 Dec, 2018 1 commit
  32. 05 Dec, 2018 1 commit
  33. 08 Nov, 2018 1 commit
  34. 25 Oct, 2018 1 commit