MIMO

The modular ultra-wideband (UWB) pseudo noise (PN)-sequence sensor was introduced to showcase the capabilities of the EMS-developed integrated circuits (ICs) Xampling Generator 1 (XG1) and Xampling Frontend 1 (XF1) which were specifically designed to demonstrate the paradigm of compressive sampling implemented on real silicon hardware¹. The sensor system divides into two main units - modular multiple input and multiple output (MIMO) transceiver (TRx) frontend and corresponding data acquisition backend.

It has been observed in ¹ and Chapter 2.5 of ² that in channel estimation and modelling a substantial proportion of the transmit energy is not resolveable by a superposition of specular paths, which mostly adhere to a ray of propagation model. These so called diffuse multipath components (DMC) which do not follow the specular ray model pose two challenges.

The ESPARGOS development board¹ allows easy access to IQ data obtained from Wifi communications. As such, it efficiently sniffes an environment while providing realtime access to pilot symbols and respective channel state information. This allows to use of parameter estimation techniques based on maximum likelihood like².

The HyEff channel sounder is a high‑performance measurement system developed for characterizing complex radio propagation environments, particularly for MIMO (multiple‑input-multiple‑output) wireless channels. It enables precise measurement of the time‑, frequency‑, and spatial characteristics of multipath propagation. By delivering precise and efficient measurement of the spatio‑temporal structure of the radio channel, the HyEff channel sounder bridges the gap between theoretical modeling and real‑world wireless system deployment. Its integration with high‑resolution estimation techniques makes it a key tool for the development of next‑generation communication systems.