Live LTE Time Trigger Demo (needs key)
Attached mission shows how to live lock/sync on LTE broadcastings by using the 3D Pulsed Waterfall block:
Simply adjust the trigger (Duration) until you get the packag type of interested perfectly synct. 80ms does the job for LTE:
The mentioned 80ms pulse duration shows packages that look like a TTI from multiple GSM bases stations.
We can see 6 cluster packages with 10ms overall cluster length. In LTE the TTI length is fixed to 1 ms so for sure this must be a UMTS/HSPA transmission which offers a TTI of 2 ms, 10 ms (or 20 ms, 40 ms, 80 ms for some channels), and fixed for a given channel.
The Transmission Time Interval (TTI) from a UMTS/HSPA is an interval of time for transmission of one layer 2 data unit (PDU). The TTI comprises the group of blocks of resources for the transmission to which the same coding and modulation is applied.
You might also want to watch a demo video of the mission at https://youtu.be/GkqM364Kh34
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Awesome! Thanks so much for sharing this. I'm going to try it out this afternoon)
