3072 virtual antennas. One coherent aperture.
Eight subarray boards with sixteen data AWR2243 plus two cascade LO masters form a 48 TX × 64 RX array — 3072 cross-coherent virtual antennas, streamed as raw IQ into a Jetson AGX Orin in under 30 ms end to end.
Eight boards. Eight links. One Jetson.
Every subarray board sends exactly one A-PHY long-reach link; eight links land at the Valens deserializers, cross to C-PHY and appear as sixteen plain V4L2 devices.
Every stream has an address.
A fixed, predictable mapping from subarray to device node — the same scheme at every build stage.
| SUB | AWR2243 | STM32L5 | LO DOMAIN | A-PHY | V4L2 |
|---|---|---|---|---|---|
| Sub 1 | AWR-1a · AWR-1b | #1 | A | Link 1 | /dev/video0 .. 1 |
| Sub 2 | AWR-2a · AWR-2b | #2 | A | Link 2 | /dev/video2 .. 3 |
| Sub 3 | AWR-3a · AWR-3b | #3 | A | Link 3 | /dev/video4 .. 5 |
| Sub 4 | AWR-4a · AWR-4b | #4 | A | Link 4 | /dev/video6 .. 7 |
| Sub 5 | AWR-5a · AWR-5b | #5 | B | Link 5 | /dev/video8 .. 9 |
| Sub 6 | AWR-6a · AWR-6b | #6 | B | Link 6 | /dev/video10 .. 11 |
| Sub 7 | AWR-7a · AWR-7b | #7 | B | Link 7 | /dev/video12 .. 13 |
| Sub 8 | AWR-8a · AWR-8b | #8 | B | Link 8 | /dev/video14 .. 15 |
I²C addresses serve only as probe hooks (bypass_i2c=1) — the real chirp configuration reaches the AWR2243 over SPI from each board's STM32L5.
Coherent where it counts. Autonomous where it helps.
Two cascade masters make LO distribution a configuration switch: run all eight subarrays as one aperture — or split them.
All coherent
Cascade-Master A (master-master) clocks all eight subarrays — one cross-coherent aperture of 3072 virtual antennas.
Seven plus one
Seven subarrays stay coherent while one runs autonomously — for example with its own chirp preset in parallel.
Two domains plus one
Cascade-Master B (master-slave) adds a second LO domain for up to four subarrays — groups run independently, individual subarrays fully autonomous.
Capon beamforming runs strictly per subarray — the gaps between subarrays would produce grating lobes. The cross-coherent 3072-antenna aperture remains available on top for advanced processing.
Real time at full scale.
Benchmarked on the Jetson AGX Orin 64 GB — CPU pipeline first, cuFFT where it pays off.
Modular by design.
From a single subarray to the full 8-subarray system — architecture, firmware and software scale by configuration, not redesign. We serve any configuration on request.