Subhash Lakshminarayana

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One of the most important challenges in smart grid systems is the integration of renewable energy resources into its design. In this work, two different techniques to mitigate the time varying and intermittent nature of renewable energy generation are considered. The first one is the use of storage, which smooths out the fluctuations in the renewable energy(More)
We consider the problem of multi-cell downlink beamforming with N cells and K terminals per cell. Cooperation among base stations (BSs) has been found to increase the system throughput in a multi-cell set up by mitigating inter-cell interference. Most of the previous works assume that the BSs can exchange the instantaneous channel state information (CSI) of(More)
Multirate multicasting is a generalization of single-rate multicasting to prevent destinations with good connections from being limited by the capacity of bottleneck connections. While multirate multicasting has been traditionally performed over fixed trees, advances in network coding theory have enabled higher throughput and have helped us move beyond the(More)
In this work, we consider a multiple-input singleoutput system in which an access point (AP) performs a simultaneous wireless information and power transfer (SWIPT) to serve a user terminal (UT) that is not equipped with external power supply. In order to assess the efficacy of the SWIPT, we target a practically relevant scenario characterized by imperfect(More)
We consider the problem of coordinated multicell downlink beamforming in massive multiple input multiple output (MIMO) systems consisting of N cells, N<sub>t</sub> antennas per base station (BS) and K user terminals (UTs) per cell. In particular, we formulate a multicell beamforming algorithm for massive MIMO systems that requires limited amount of(More)
In this work, we address the joint problem of traffic scheduling and interference management related to the deployment of Small Cell Networks (SCNs). The Base Stations of the SCNs (which we will refer to as Micro Base Stations, MBSs) are low power devices with limited buffer size. They are connected to a Central Scheduler (CS) with limited capacity backhaul(More)
We consider a small cell network (SCN) consisting of N cells, with the small cell base stations (SCBSs) equipped with Nt ≥ 1 antennas each, serving K single antenna user terminals (UTs) per cell. Under this set up, we address the following question: given certain time average quality of service (QoS) targets for the UTs, what is the minimum transmit power(More)
Two different techniques for the integration of renewable energy in smart grid systems are considered. The first is storage, which smooths the fluctuations of the renewable energy generation across time. The second is the concept of distributed generation combined with cooperation by exchanging energy among the distributed sources. This technique leads to(More)