Collaborative Spectrum Sensing from Sub-Nyquist Samples for Cognitive Radios - Demo
The goal of this project is to demonstrate cooperative using the MWC in a centralized way.
Alon Akiva, Barak Avraham
Cognitive Radio Demo
Main goal – implementing a demo using several transmissions made by USRPs which will be received by the MWC system.
Hadar Wenger, Yarin Ganon
Sub-Nyquist Sampling of OFDM Signals for Cognitive Radios
In light of the ever-increasing demand from new wireless communication users, the issue of spectral resources has become critical over the past few years. Cognitive radios (CR) allow secondary users to use unutilized frequencies when primary user is inactive.
OFDM has developed into a popular scheme for wideband digital communication, such as WiFi, 4G mobile communications, etc.
We present the MWC-OFDM system, which performs sampling and decoding of an OFDM signal with an unknown carrier at sub-Nyquist rates
Tom Zahavi, Oran Shayer
Clutter Rejection in a Sub-Nyquist Radar
We show a clutter rejection algorithm implemented on a sub-Nyquist radar. The system demonstrates pulse-Doppler radar transmission and reception at sub-Nyquist rates while still perfectly detecting the targets in a cluttered environment. Our system filters clutter interference from the sub-Nyquist samples by implementing the algorithm with all the processing done at the low rate. We introduce the theoretical framework of statistical clutter model allowing us to implement the filtering algorithm at the low rate samples. Finally, we demonstrate the system performance and show simulation results of our system using the clutter filtering algorithm.
Roei Levi, Aharon Cohen
Distributed Processing of Sub-Nyquist Sampled Ultrasound Signals
Project goals are reducing the sampling rate of ultrasound signals, which are currently sampled beyond their Nyquist Rate, by utilizing Xampling and frequency domain beamforming techniques. To do so, we’ll simulate a hardware component, named Xampler (initial simulation in Matlab exists). This component performs, demodulation with complex sine, low pass filtering and sample rate reduction, followed by FFT engine.
Armand Chocron, Samuel Londner
Coded Excitation Approach to Medical Ultrasound - Part I
Project goals are to study and examine coded excitation methods for ultrasound imaging adopted from the modern radar and communication techniques. Compare its performance to the conventional approach that uses single-carrier short pulses. Incorporate coded excitation and pulse-compression to the frequency domain beamforming framework developed recently in SAMPL.
Yuval Ben-Shalom, Almog Lahav