Research Interests

1. Cognitive Radio Networks
   Coexistence Management
   Dynamic Spectrum Sharing
   Biofield Sciences and Body Area Networks
   Wireless Communications
   Information Technology and Enterprise Transformation

My present and past research is presented as follows.

Present 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.

Time Spectrum Block Scheduling in Cognitive Radio Networks:
Time spectrum block is the concept of seeing the spectrum opportunities during various time blocks over which the spectrum is available for secondary usage. Using this model the time spectrum opportunities can be scheduled wisely between various secondary cognitive users. In the TV band, it is highly possible to determine the times during which the spectrum blocks would be available or not. This gives an opportunity to allocate the spectrum resources among cognitive users.

Past Research

Wireless Spacecraft Communication:
The main goal was to develop a wireless communication infrastructure on-board 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.

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.