E2E4: 5G I/Q Post Processing

1) 5G NR I/Q Samples Dataset Experiment Scenario

• Experiment site: NC State main campus (Packapalooza festival)

• Transmitter: commercial BSs operated by Verizon, receiver: helikite

• Description

We float the AERPAW helikite to an altitude of 400 feet from noon to 9 p.m. during NC State’s Packapalooza festival in August 2022. The AERPAW helikite is equipped with an SDR (USRP B205mini) and a GPS receiver while collecting I/Q samples. The helikite is set to collect 20 ms I/Q samples every 9 minutes with a 30.72 MHz sampling frequency at the 3.7 GHz C-Band. From the analysis of the spectrum monitoring, we found that there is a 5G NR transmission spanning a 60 MHz bandwidth (3.70 GHz to 3.76 GHz) in band n77, which is operated by Verizon in the United States.

2) Post-processing Code for NR 5G I/Q Sample Dataset

• Ericsson 5G gNB IQ datasets collected by LW1 and LW3 w/wo RF front end: [download]

• Post-processing code link: [download]

• Description

Run MATLAB 'NR_post_processing.m' file with a proper file directory setup. The simulation output provides RSRP and RSRQ by using MATLAB 5GToolbox.

3) Representative Plots by NR 5G I/Q Sample Dataset

• Ericsson 5G gNB I/Q samples from LW1 fixed node equipped with RF front end