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Vandermonde-subspace frequency division multiplexing (VFDM) is a newly-proposed spectrum sharing technology, where perfect channel state information (CSI) is required. In this paper, considering complex Gaussian distributed channel estimation error, we study the interference leakage from small cell (SC) to macro cell (MC) due to imperfect CSI. The probability density function (PDF) of the upper bound...
In a wireless network with multiple users, interferences cause performance degradation as well as provide extra opportunities for harvesting RF energies. In this work, a new joint design of interference alignment (IA) and energy harvesting (EH) that aims to reduce interferences to the desired user and harvest energies from the interferences when IA is inefficient is studied. Two iterative IA schemes,...
In wireless networks, how to select transmit power that maximizes throughput is a challenging problem. On one hand, transmissions at a high power level could increase interference to others; on the other hand, transmissions at a low power level are prone to being interfered by others. Prior works consider this problem as a search for a fixed optimal power setting that maximizes communication spatial...
In multi-hop wireless networks, maximizing network utility by joint congestion control and scheduling has drawn much research interest, and significant progress has been made that has yielded much insight. However, in attempting to maximize network utilization, most scheduling mechanisms proposed in earlier works are too complicated to be implemented in wireless devices. One traditional approach to...
In this paper we study the issue of topology control under the physical signal-to-interference-noise-ratio (SINR) model, with the objective of maximizing network capacity. We show that existing graph-model-based topology control captures interference inadequately under the physical SINR model, and as a result, the interference in the topology thus induced is high and the network capacity attained...
We address the problem of multi-stream multicasting, where independent data streams are transmitted from a multi-antenna transmitter to several groups of independent single-antenna receivers. Multi-antenna multicasting allows forming spatial beams. By properly shaping the beam patterns, intergroup interference can be avoided and the SINR at all receivers can be jointly controlled. In addition, we...
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