Speaker
Description
5G NR and emerging 6G systems are expected to reuse communication
waveforms for sensing, but practical demonstrations face two coupled
problems: reference signals occupy a sparse, traffic-dependent
resource grid, while non-terrestrial links introduce time-varying
delay and Doppler that degrade the coherence required by both
demodulation and sensing.
This work presents a hardware-in-the-loop ISAC prototype built with
GNU Radio, low-cost USRP B200 radios, a 5G NR base-station waveform,
and an ephemeris-driven LEO channel emulator. The receiver acquires
and tracks bulk timing and carrier motion from NR synchronization and
demodulation reference signals. After decoding the PDSCH, it
reconstructs payload symbols and combines them with reference symbols
to form a denser delay-Doppler observation for simultaneous link
operation and sensing of programmable reflected paths. A live
dashboard compares reference-only and payload-aided processing while
an emulated satellite pass changes delay, Doppler, and attenuation. We
evaluate throughput, BLER, EVM, delay and range-rate error, detection
probability, false alarms, and host processing latency using emulator
state as ground truth. The demonstration asks a practical 6G question:
can a standards-compatible 5G waveform turn NTN impairments into
useful sensing state without reserving additional sensing resources?
We conclude with the bandwidth, clock, and real-time processing limits
of low-cost SDR hardware.
| Talk Length | 15 Minutes |
|---|---|
| Acknowledge | Acknowledge In-Person |