I am a PhD student at the CARlab. My PhD research involves the development and fabrication of a low power Radio Frequency (RF) Integrated Circuit (IC) transceiver chip with carrier frequency & phase measurement and manipulation. My thesis also focuses on the additional development of a synchronisation technique specific to the distributed beamforming wireless sensor network - for minimal power usage, transmission bits and computation resources.
My research project’s aim is to achieve energy savings and energy load spread for a low power wireless sensor network through the use of distributed beamforming (also known as collaborative beamforming) transmissions.
A sensor network implementing distributed beamforming forms a virtual antenna array with the intention of exploiting multiple sensors (i.e. their antennas) within the network to collaboratively transmit data back to a base station, or another wireless sensor network. The collaboration between sensors evenly distributes the transmission power among the network at a reduced network transmission power acquired as a result of increased directivity gain from beamforming. Sensors within a distributed beamforming network therefore possess relatively similar lifetimes across the entire network, generating a long lived reliable sensor network with minimal blackout spots.
The challenging problem here is minimising the additional energy overhead required in data distribution over the network in addition to the frequency and phase synchronisation between sensors. This necessitates the need for a low power wireless transceiver with a built in frequency and phase synchronisation system designed to hold synchronisation for the subsequent distributed transmission.
S. Luskey, C. Jin, A. van Schaik, “Energy Savings from Implementing Collaborative Beamforming for a Remote Low Power Wireless Sensor Network”, AusWireless’06 Conf., March 2006