Projects
Completed
Spring 2014
Communication
Project Title:

Collaborative Spectrum Sensing from Sub-Nyquist Samples for Cognitive Radios - Demo

Project ID:

2367

Abstract:

In light of the ever-increasing demand for new spectral bands and the underutilization of those already allocated, the new concept of Cognitive Radio (CR) has emerged. Opportunistic users could exploit temporarily vacant bands after detecting the absence of activity of their owners. One of the most crucial tasks in the CR cycle is therefore spectrum sensing and detection which has to be precise and efficient. Two phenomena, path loss or fading channels and shadowing, challenge individual CR’s performance. To overcome those practical issues, collaborative CR networks have been considered, where different users share their sensing results and cooperatively decide on the licensed spectrum occupancy.

The goal of this project is to demonstrate cooperative using the MWC in a centralized way.

Description:

PDR

Supervisor(s):

Student(s):

Alon Akiva, Barak Avraham

Semester:

Spring 2014

Project Title:

Cognitive Radio Demo

Project ID:

2119

Abstract:

Main goal – implementing a demo using several transmissions made by USRPs which will be received by the MWC system.

Description:

PDR

Supervisor(s):

Student(s):

Hadar Wenger, Yarin Ganon

Semester:

Spring 2014

Project Title:

Sub-Nyquist Sampling of OFDM Signals for Cognitive Radios

Project ID:

1891

Abstract:

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

Description:

PDR

Supervisor(s):

Student(s):

Tom Zahavi, Oran Shayer

Semester:

Spring 2014

Project Title:

Clutter Rejection in a Sub-Nyquist Radar

Project ID:

1818

Abstract:

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.

Description:

PDR

Supervisor(s):

Tal Nagar

Student(s):

Roei Levi, Aharon Cohen

Semester:

Spring 2014

Biomedical
Project Title:

Distributed Processing of Sub-Nyquist Sampled Ultrasound Signals

Project ID:

1894

Abstract:

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.

Description:

PDR

Supervisor(s):

Student(s):

Armand Chocron, Samuel Londner

Semester:

Spring 2014

Project Title:

Coded Excitation Approach to Medical Ultrasound - Part I

Project ID:

2067

Abstract:

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.

Description:

PDR

Supervisor(s):

Student(s):

Yuval Ben-Shalom, Almog Lahav

Semester:

Spring 2014

INTERIA Web Design & Development