Changing channels

OFDM Transmission over Rapidly Changing Channels

Achievable Degrees of Freedom in MIMO Correlatively Changing Fading Channels

The relationship between the transmitted signal and the noiseless received signals in correlatively changing fading channels is modeled as a nonlinear mapping over manifolds of different dimensions. Dimension counting argument claims that the dimensionality of the neighborhood in which this mapping is bijective with probability one is achievable as the degrees of freedom of the system. We call ...

Changing Thresholds in the Absence of Secure Channels

The ways the threshold parameter can be modified after the setup of a secret sharing scheme is the main theme of this work. The considerations are limited to the case when there are no secure channels. First we motivate the problem and discuss methods of threshold change when the dealer is still active and can use broadcasting to implement This work was supported by the European Commission unde...

Changing dendritic excitability with A-type K+ channels

Spike timing dependent plasticity is a critical component of long term synaptic changes that seem to account for Hebbian-type learning and relies in many cases on backpropagating action potentials. However, it is unclear how variation in the morphology and conductance properties of the dendritic tree affect backpropagating action potential success. Recent evidence indicates that A-type K+ chann...

Changing perceptions, changing reality.