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. We have investigated some bouncing models in the framework of an extended gravity theory where the usual Ricci scalar in the gravitational action is replaced by the sum of the Ricci scalar and a term proportional to the trace of the energy momentum tensor. The dynamical parameters of the models are derived in a most general manner. We considered two bouncing scenarios described by an exponential...
In this work, we model and analyze a cellular system that operates in the licensed band of the 3.5 GHz spectrum and consists of a licensed and an unlicensed operator. Using tools from stochastic geometry, we study the co-existence of these networks from the perspective of the unlicensed operator. We model the licensed base station (BS) locations as a homogeneous Poisson point process with protection...
In this work, we analyze the uplink performance of a massive multiple input multiple output network with asymptotically large number of antennas at the base stations. Following the usual approach, we first derive the characteristic function of interference and use the classical Gil-Palaez inversion theorem to obtain the coverage probability expression. However, since the resulting expression does...
In this paper, we model and analyze a cellular network that operates in the licensed band of the 3.5-GHz spectrum and consists of a licensed and an unlicensed operator. Using tools from stochastic geometry, we concretely characterize the performance of this spectrum sharing system. We model the locations of the licensed base stations (BSs) as a homogeneous Poisson point process with protection zones...
In this work, we have considered the downlink of an Orthogonal Frequency Division Multiplexing based Non Orthogonal Multiple Access system where transmission to multiple number of users is performed on the same sub-band (time-frequency resource unit) using Superposition Coding (SC) technique. At the receiver side, the SC coded symbols are recovered with Successive Interference Cancellation (SIC)....
This work characterizes the statistical distribution of the post processing Signal to Interference Ratio (SIR) for a multi-cellular system employing different spatial diversity modes such as receive-maximal ratio combining, space time block coding, and closed loop singular value decomposition based beamforming. The framework used for analysis considers the combined effect of distance dependent pathloss,...
Voice over Internet Protocol (VoIP) being highly sensitive to errors is usually transmitted using diversity mode (Space Frequency Block Coding (SFBC)) of Multiple Input Multiple Output (MIMO) in Orthogonal Frequency Division Multiple Access networks. In Long Term Evolution, the Closed Loop Rank - 1 (CLR-1) being more error resilient than higher order MIMO modes is also one of the attractive options...
Performance analysis of data services is studied in CDMA network by incorporating Low Density Parity Check (LDPC) codes in presence of soft handoff. This scheme is found to enhance throughput and reduce delay and packet error rate significantly. A stop and wait ARQ has been assumed. Both the cases of coded and un-coded data transmission are investigated.
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