Add Positioning Reference Signal (PRS) to gNB and nrUE

• Rel16 Positioning reference signal(PRS) generation in OAI gNB
• PRS based Channel estimation at OAI nrUE
• Time of arrival(ToA) estimation at nrUE based on channel impulse response(time domain)
• Finer ToA estimation by 16x oversampled IDFT for channel impulse response
• T tracer dumps for PRS channel estimates
• FR1, FR2 gNB and UE configs for PRS testing
• Multiple gNB scenario validated with gNBs synced via GPSDO
• In FR1 and FR2 modes, PRS signal is successfully decoded on Spectrum Analyser R&S Rel16 version

added 5G-NR label

requested review from @florian.kaltenberger

assigned to @florian.kaltenberger

OAI RAN-CI-develop build (3809): Some Changed files in Merge Request DO NOT follow OAI Formatting Rules

changed title from Merging nr_prs branch into develop to Add Positioning Reference Signal to gNB

why don't you add the PRS config under gNB.[0] in the configuration? why do you add so many new config files?

I suggest you delete these config files. Provide sensible default values and maybe add ONE new config file. We already have too many that get out of sync.

OAI RAN-CI-develop build (3809): failed (https://open5glab.eurecom.fr:8083/jenkins/job/RAN-CI-develop/3809/)