by Amungo Navigation

Four-channel, all-frequency, GNSS RF-to-bits receiver for precision, satellite-based positioning

View all updates May 31, 2019

The NUT2NT+ FPGA Slave FIFO Makes the Signal Capturing Stable

Hello to Everyone!

There are updates to the code of the Lattice FPGA and FX3 USB microcontroller.

There were samples losses in high input/output or CPU load situations. We added a slave FIFO buffer in FPGA, changed Cypress GPIF design and now continuous capturing become more stable in real apps. Now thanks to slave FIFO buffer the samples are accumulated in FPGA and then the FX3 microcontroller downloads bulk of data when FIFO contains necessary number of samples.

People already having the NUT2NT+ can download the code from Amungo github, build the FPGA and FX3 binaries and test it under high system load.

We captured long signal sample and processed it by Matlab code. Alright, the SNR value is about 50 dB all the time.

The NUT2NT+ and antenna used in test above and oscilloscope used to debug the FPGA code.

Artem Krivosheev,

Amungo Navigation

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An open, lowest cost Multi-Band Multi-system GNSS RF Front End.


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A stable phase center single L1 band antenna.


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A L1/L2/L5 multi-bands antenna.


Amungo Navigation

Amungo Navigation creates hardware for geo-location.

Igor Tcarik

Strategic management, design of antennas

Simeon Voropaev

Hardware design, manufacturing and testing

Sergey Speranskiy

PCB design

Ivan Makushkin

Software development, embedded and signal processing

Daria Ianovskaia

RF circuits design, RA antennas LNA and NUT2NT+ board's RF circuits

Dmitriy Bitsulya

Software engineering, C/C++ Developer, NUT2NT+ GNSS-SDR support

Ekaterina Kolomnikova

Hardware assembling

Nadezhda Bybko

Supply and fulfillment management

Vladimir Vikulin

FPGA Design and Verification Engineer, FAE

Artem Krivosheev

FPGA code design

Andrey Khazov

Metal parts design

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