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- 01 Feb, 2021 1 commit
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luis_pereira87 authored
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- 21 Dec, 2020 1 commit
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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
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- 05 Nov, 2020 1 commit
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Khodr Saaifan authored
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- 31 Aug, 2020 1 commit
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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
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- 27 Aug, 2020 1 commit
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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
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- 06 Aug, 2020 1 commit
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- 08 May, 2020 2 commits
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Francesco Mani authored
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Raymond Knopp authored
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- 07 May, 2020 2 commits
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Francesco Mani authored
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Francesco Mani authored
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- 04 May, 2020 1 commit
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Raymond Knopp authored
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- 29 Apr, 2020 1 commit
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Francesco Mani authored
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- 24 Mar, 2020 1 commit
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Francesco Mani authored
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- 13 Mar, 2020 1 commit
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Francesco Mani authored
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- 06 Mar, 2020 1 commit
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Francesco Mani authored
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- 18 Dec, 2019 1 commit
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Khalid Ahmed authored
- nr_ulsim supports multiple DMRS configurations
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- 08 Oct, 2019 1 commit
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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
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- 10 Sep, 2019 1 commit
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yilmazt authored
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- 23 Aug, 2019 1 commit
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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
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- 07 Feb, 2019 1 commit
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Guy De Souza authored
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- 07 Dec, 2018 1 commit
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Raymond Knopp authored
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- 05 Dec, 2018 1 commit
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Raymond Knopp authored
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- 08 Nov, 2018 1 commit
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hongzhi wang authored
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- 25 Oct, 2018 2 commits
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Raymond Knopp authored
Still a remaining issue with the SNR normalization, way too low to get errors.
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Raymond Knopp authored
0. unwiring of 40 MHz channel hard-coding and general SSB location 1. PSS dynamic range improvement and DC carrier fix 2. SSS channel estimation and detection corrected 3. PBCH channel estimation fixed 4. PBCH channel extraction/compensation reworked for the general case 5. fixed-point low-complexity polar decoder integrated to PBCH decoding chain works by default (nr_pbchsim) at 100 MHz / 30 kHz SCS and SSB wherever (but known to UE)
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- 10 Oct, 2018 1 commit
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Hongzhi Wang authored
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- 05 Oct, 2018 1 commit
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Florian Kaltenberger authored
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- 04 Oct, 2018 1 commit
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Agustin authored
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- 20 Sep, 2018 1 commit
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Florian Kaltenberger authored
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- 13 Sep, 2018 1 commit
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Hongzhi Wang authored
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- 22 Aug, 2018 1 commit
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hongzhi wang authored
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- 10 Aug, 2018 1 commit
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Hongzhi Wang authored
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- 25 Jul, 2018 1 commit
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Hongzhi Wang authored
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- 10 Jul, 2018 2 commits
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Hongzhi Wang authored
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Hongzhi Wang authored
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- 04 Jul, 2018 1 commit
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hongzhi wang authored
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- 02 Jul, 2018 1 commit
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Hongzhi Wang authored
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- 26 Jun, 2018 1 commit
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hongzhi wang authored
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- 19 Jun, 2018 1 commit
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hongzhi wang authored
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- 14 Jun, 2018 1 commit
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hongzhi wang authored
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