Gaurav Nigam

Learn More
—Motivated by the ongoing discussion on coordinated multipoint in wireless cellular standard bodies, this paper considers the problem of base station cooperation in the downlink of heterogeneous cellular networks. The focus of the paper is the joint transmission scenario, where an ideal backhaul network allows a set of randomly located base stations,(More)
—Motivated by the ongoing discussion on coordinated multipoint in wireless cellular standard bodies, this paper considers the problem of base station cooperation in the downlink of heterogeneous cellular networks. The focus of the paper is the joint transmission scenario, where an ideal backhaul network allows a set of randomly located base stations,(More)
This paper studies downlink communication in a heterogeneous cellular network where a set of geographically separated base stations (BSs) cooperates in transmitting data to a common receiver. If a decoding error occurs, data is cooperatively retransmitted by a possibly different set of BSs, such that the receiver can benefit from spatiotemporal BS(More)
—We design root Nyquist pulses having maximum in-band fractional energy for a given finite bandwidth. The problem of maximizing the ratio of in-band energy to total energy has been dealt with earlier. But an exact solution could not be found since it involved optimization of a quadratic objective function with quadratic constraints. We have found an exact(More)
—This paper provides an analysis to compare the benefits of spatial and spatiotemporal cooperation between base stations in the presence of interference in a heterogeneous cellular network. The focus of the paper is the cooperative retransmission scenario, where a set of randomly located base stations that are selected based on their average received power(More)
In recent years, largely dictated by third party payer policies there has been a paradigm shift in terms of utilization of in-laboratory positive airway pressure (PAP) titration studies. In-laboratory PAP titration study to determine the effective PAP setting to treat obstructive sleep apnea (OSA) is considered the gold standard practice. Unfortunately,(More)
Predicting the neurological outcome in survivors of cardiorespiratory arrest is difficult. A distinction has been made between acute and chronic posthypoxic myoclonus, called myoclonic status epilepticus and Lance-Adams syndrome (LAS), respectively, with the acute condition carrying a bad prognosis. Here, we report a case of a 37-year-old female who(More)
INTRODUCTION Treatment-emergent central sleep apnea (TECSA) is the appearance of central apneas and hypopneas after significant resolution of the obstructive events has been attained using positive airway pressure (PAP) therapy. The aim of the study was to determine the prevalence of TECSA and to understand what factors are associated with its development.(More)