- Research work on SAW Resonator Oscillator Based Injection Locked OOK Transmitter by Dr. Abhishek Srivastava, CVEST and his collaborators Dr. Devarshi Das; IIT Ropar, Dr. M Shojaei Baghini, IIT Bombay was granted an Indian patent. The inventors describe the patent as a novel technique for implementing low power wireless transmitter for short range communication in 400 MHz Medical Device Radiocommunication band has been presented by using SAW resonator-based injection locked system.
- Research paper on Design and Implementation of 0.23 nJ/bit Reference-Spur-Free FSK/OOK Transmitter at 400 MHz for Wearable Health Monitoring by Dr. Abhishek Srivastava, Dr. Devarshi Das, IIT Ropar and Dr. M Shojaei Baghini, IIT Bombay has been selected as one of the top contributions at IEEE Biomedical Circuits and Systems Conference (BioCAS-2021) held in Berlin, Germany from 6 – 9 October. The authors have been invited to submit this paper in a special edition of IEEE Transactions on Biomedical Circuits and Systems (TBioCAS).
The selection of paper as one of the top contributions is usually equivalent to the Best Paper Award. The authors were not allowed to participate in the best paper award category as all the authors were professors.
TBioCAS addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the IEEE Circuits and Systems Society to a wide variety of related areas. Research work as described by the authors Dr. Abhishek Srivastava, Devarshi Das and M Shojaei Baghini:
Increasing demands of wearable health monitoring seek dedicated spectrum for short range wireless communication of biosignals, for which frequency band near 400 MHz has been utilized recently. While using the dedicated spectrum, biosignal communication must not cause any out of band radiations and interference, for which there is a strong need to develop spur free, low phase noise and energy efficient wireless transmitters(TX). In this research, for the first time we present design and implementation of a reference-spur-free, low phase noise, sub-mW dual modulation mode (frequency shift keying (FSK)and on-off keying (OOK)) 400 MHz TX for wearable health monitoring, where RF synthesis depends solely on an extremely low phase noise oscillator, which uses a 400 MHz surface acoustic wave resonator and does not include any power hungry, spur generating frequency multiplier or phase/frequency lock loop. The proposed TX has been designed and fabricated in 180 nm CMOS technology. Measurement results show that the energy efficiencies of the proposed TX in FSK and OOK mode are 1.8nJ/bit at 250 kb/s and 0.23 nJ/bit at 2 Mb/s, respectively. To prove the utility of the proposed TX, biosignal communication is also demonstrated with the help of a commercial receiver in actual operating scenarios, where the measured bit error rate in FSK mode was < 10e-5 for range of 2 m.
- Mission Parikshit was one of the winners of the Kohli Challenge Proposal Scheme funded by Kohli Center on Intelligent Systems (KCIS) endowed by TCS foundation. The principal investigator of this project is Dr. Abhishek Srivastava and co-principal investigators are Dr. Anshu Sarje, Dr. Kavita Vemuri and Prof. Bapi Raju.
In this project Dr. Abhishek Srivastava and his team members will develop a low-cost, reliable, and fast hand-held pediatric pneumonia detector. It is a multidisciplinary project that involves circuits, sensors, computational and clinical aspects.