Justin Krenz
Justin Krenz is an inventor in the field of 3D technology.
Developments in UWB[edit]
Justin Krenz developed a position tracking system using RF, specifically UWB, circa 2010 to 2014.
An early prototype used a custom-built receiver that had an antenna board connected to a second board that did digitizing of the RF signal, which contained amplifiers and digitizer circuitry. The digitized signal was sent over a USB 3 cable to a field-programmable gate array (FPGA). The FPGA board was the Atlys from Digilent. This early prototype was powered from an ATX PC power supply. Justin claimed the receiver had picosecond time resolution. The transmitted signal is 3-5 Ghz.[1]
His system was based on time-of-arrival (ToA) from a transmitter that had a clock signal synchronized with the receiver. In one version of the prototype, the clocking system consisted of a main system clock going to both the transmitters and the receivers through wires.[2]
Justin implemented rotation tracking using the difference in time between two of four antennas (A smaller time difference means a smaller angle).[1]
In later prototypes, Justin instead used an IMU for rotation tracking.
In a prototype, Justin designed a custom circuit board to integrate the FPGA onto the receiver board.[1] He manually soldered a BGA FPGA onto his board using a toaster oven.[1]
The benefit of his system compared to electromagnetic tracking is that his system has higher range.
His research included integration of the DIYDrones ArduIMU+ V3 IMU board.[1]
He made custom software in Unity for the tracking system.[3]
The system was shown off to Valve.[4]
Justin implemented subsampling, which allowed him to capture a Ghz signal with a slower analog-to-digital converter by exploiting the fact that the signal repeats, which allowed him to take one part of the waveform and then take another sample the next cycle of the wave, but offset by a small amount, to then reconstruct the whole thing after he took small samples of each part of the signal.[2]
This technology was later sold to The VOID, a company specilizing in large-scale real-world VR attractions.
Positions[edit]
- Founder of Brenodi Labs
- Vice President of Research and Development at The Void
- Kura Technologies
References[edit]
- ↑ 1.0 1.1 1.2 1.3 1.4 "RF Tracking System". 2014-03-28. http://www.mtbs3d.com/phpbb/viewtopic.php?f=138&t=15623.
- ↑ 2.0 2.1 "RF Tracking System". 2014-03-28. http://www.mtbs3d.com/phpbb/viewtopic.php?f=138&t=15623&start=80.
- ↑ Labs, Brenodi. "Brenodi Labs". http://www.brenodi.com/.
- ↑ "RF Tracking System". 2025-11-27. https://www.mtbs3d.com/phpbb/viewtopic.php?f=138&t=15623&start=80.
- "VP of R&D at Kura Technologies". 2023-01-12. https://theorg.com/org/kura-technologies/org-chart/justin-krenz.
- Smith, Dave; Protin, Corey (2015-11-08). "A nuclear engineer is solving virtual reality's biggest problem". https://www.businessinsider.com/engineering-behind-void-first-vr-park-2015-11.