Nvidia Corporation

Icera, Inc.

Jonathan Peter Lucas

Carlo Luschi

Steve Allpress

Edward Andrews

Stephen Alan Allpress

Simon Nicholas Walker

Simon Huckett

Laolu Lijofi

Edward Charles John Andrews

Robert Buckley

An apparatus, method and program for processing a signal received over a wireless channel. The apparatus comprises: a channel searcher configured to determine a profile of the channel in the form of energy values for a plurality of rays at respective channel positions, and an equalizer for equalizing the signal based on a variable window of the equalizer. The channel searcher is configured to estimate dispersion of the channel by determining a measure of variance of ray distance from a reference position within the channel profile weighted by ray energy. The equalizer is coupled to the channel searcher and arranged to adapt the window in dependence on the measure of energy-weighted ray distance variance.

Equalisation of a signal received over a wireless channel

One aspect provides a method of controlling transmit power in a wireless device, wherein a desired transmit power is determined as a result of detection of a receive signal parameter. The method comprises detecting a desired maximum transmit power and generating a sequence of attenuation factors. The sequence is generated by monotonically increasing a variable at a controlled rate between a starting value and the maximum transmit power. The method further comprises using each attenuation factor in turn to: (a) reduce the measured value of the received signal power; and (b) reduce a determined desired value of the transmit power, where the transmit power is continually reduced as the variable is increased.

Controlling transmit power in a wireless device

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Bristol, United Kingdom

Jonathan Peter Lucas