Research
Spectrum Sharing in Cognitive Radio Networks:
Cognitive
Radio Networking is the promising technology for efficient use of
Spectrum Bands. Spectrum Bands are very scarcely used by the licensed
users, thus leaving a lot of white spaces. This causes a lot of
spectrum wastage. In order to use these white spaces opportunistically,
secondary users try to use the subbands opportunistically, also making
sure that the primary user band usage is not interfered. This is a
great challenge for Cognitive Radios Communities. My research focus
remained
on the analytical approach in finding the optimal sharing possibility
for both Primary and Secondary users minimizing any interference. At
present I am working on the allocation of resources in community
cognitive radio networks. The work is about developing algorithms for
allocation of time spectrum
blocks in community cognitive radio networks.
Wireless Spacecraft Communication:
The main goal is to develop a wireless communication infrastructure onboard spacecraft to achieve the following design objectives: mass reduction, layout simplification, savings in A-I-T labor, security enhancement and fault tolerance. The key technical challenges include RF interference, data integrity, and confidentiality. For more details click here
Cognitive Networking for Spacecraft Communications:
New developments in telecommunications, specifically in cognitive networking, expand the possible approaches for varied spacecraft missions. Cognitive networking provides a flexible and re-configurable platform that can evolve with the mission and that provide an integrated approach to communications and data processing. Cognitive networking has become a reality due to the development of Software Defined Radios (SDR). SDR’s provide networking engineers a capability to implement wireless test beds that are fully programmable at the medium access control and physical layers. The benefit of this flexibility highly depends on the performance and usability of the specific SDR. For more details click here
Coexistence Study of 802.11b and Bluetooth:
Coexistence of Bluetooth and 802.11b devices has always remained great concern for wireless industries, due to the fact that both work in the same 2.4 GHz ISM band, and both the technologies are growing very fast. Adaptive Frequency Hopping was implemented in Bluetooth devices in order to provide a more efficient interference aware hopping. I worked on simulating their coexistence in NS-2. I have also worked on the analytical modeling of the interference issues between the two technologies.