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Statistical properties of electromagnetic environment in wireless networks affecting its performance and safety are studied. A statistical method to evaluate risks to the general public due to electromagnetic radiation in wireless networks as well as their performance is proposed. The analysis is based on the standard propagation channel model, a Poisson model of random spatial distribution of transmitters,...
In this paper we study quality-of-service (QoS) provisioning in an ad hoc cognitive radio network with spectrum underlay. Both streaming traffic and non-real-time (nrt) data traffic are considered. An admission control scheme is first proposed based on relatively static information such as path loss and average interference levels in order to guarantee the average throughput of each connection. Outage...
In this work, we look at single user and multiuser Multiple-Input Multiple-Output (MIMO) beamforming networks with Channel Distribution Information (CDI). CDI does not need to be updated every time the channel changes, but only when the statistics of the channel change. Thus, feedback in the network is significantly reduced when compared to CSI schemes. With statistical information, we can only guarantee...
We consider a broadcast channel (BC) in which the base station is equipped with multiple antennas and each user has a single antenna. We study the design of systems with linear precoders and probabilistically-constrained quality of service (QoS) requirements for each user, in scenarios with imperfect channel state information (CSI) at the transmitter. Each user's QoS is expressed as an upper bound...
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