Arash Noroozi

A direct conversion GPS/Galileo receiver front-end for space applications

Current space missions demand to integrate as much functionality as possible. In this paper we present the results of an ongoing research on designing a single chip solution for a reconfigurable multi-band GPS/Galileo receiver front-end to provide flexibility in operation of a spacecraft while minimizing power, mass and cost. This receiver front-end is based on a direct conversion concept and uses inductor-less mixer and oscillator to reduce the chip area. The design uses CMOS Integrated circuit (IC) technology with 130 nm feature size. In this receiver front-end novel circuit design techniques for direct conversion mixer is used. The total power consumption of mixer and analog to digital converter is less than 40 mW.

A novel structured mathematical framework for parallel processing in cooperative satellite swarms

We address the problem of finding a fully analytical configuration for a satellite swarm in a class of deterministic transition systems. We propose a novel approach to the estimation of discrete variables using basic lattice theory that overcomes some of the severe complexity issues encountered in previous work. We show how to construct the proposed estimator for a satellite swarm performing a cooperative assignment task and also how we can configure a stable swarm.