Subhash Lakshminarayana

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—We consider the problem of coordinated multi-cell downlink beamforming in massive multiple input multiple output (MIMO) systems consisting of N cells, Nt antennas per base station (BS) and K user terminals (UTs) per cell. Specifically, we formulate a multi-cell beamforming algorithm for massive MIMO systems which requires limited amount of information(More)
—One of the most important challenges in smart grid systems is the integration of renewable energy resources into its design. In this paper, 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(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)
—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)
—In this work, we consider a multiple-input single-output 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(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)
There has been substantial interest over the last decade in developing low complexity decentralized scheduling algorithms in wireless networks. In this context, the queue-length based Carrier Sense Multiple Access (CSMA) scheduling algorithms have attracted significant attention because of their attractive throughput guarantees. However, the CSMA results(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)