K. Sridhara

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Radio spectrum is natural limited resource, which cannot be owned. Many new technologies are emerging which require spectrum for faster growth. ITU has projected that 1720 MHz spectrum will be required by the year 2020. Several services are knocking the door of telecom market but these promising services cannot be rolled out due to non-availability of(More)
Atomically thin two dimensional hexagonal boron nitride (2D h-BN) is one of the key materials in the development of new van der Waals heterostructures due to its outstanding properties including an atomically smooth surface, high thermal conductivity, high mechanical strength, chemical inertness and high electrical resistance. The development of 2D h-BN(More)
This paper attempts to find out the distributed server-based dynamic spectrum allocation (DSA) within liberalized spectrum sharing regulation concept as an alternative to existing regulation based on fixed frequency spectrum allocation schemes towards development of cognitive radio for coverage-based analogy. The present study investigates a scenario where(More)
An attempt has been made to analyze the spectrum utilization across different cellular i.e. GSM, CDMA, UMTS and WiMAX under realistic traffic scenario. The presented simulation study in this paper shows that on an average around 60% of the spectrum remains unutilized for duration of 24 hr. The Dynamic Spectrum Allocation (DSA) approach optimized by Genetic(More)
Cognitive radio (CR) technology is accepted as the most efficient method to improve the spectrum efficiency, which utilizes the available spectrum opportunistically in wireless communication networks. CR acts as a secondary (unlicensed) user to access the primary (licensed) user frequency bands when they are not being used, and release the frequency bands(More)
As technology enters into deep submicron regime, subthreshold leakage power increases exponentially and become a limiting factor in the performance of portable and battery operated electronic devices. To increase the life of battery and computational capacities of portable devices the reduction of power in standby/ sleep mode is evident. Now a day's power(More)
Radio spectrum is limited resource, its efficient use is prime concern. Normally, spectrum is allocated for any services on 20 years or more. In coming days, spectrum would be needed for shorter duration instead of longer duration of 20 years due to fast changing scenario and advancement in technology. In such situation, auction of spectrum for longer(More)
A compressed spectrum is an anticipated hideout for many beyond standard model scenarios. Such a spectrum naturally arises in the minimal universal extra dimension framework and also in supersymmetric scenarios. Low pT leptons and jets are characteristic features of such situations. Hence, a monojet with ET has been the conventional signal at the Large(More)
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