Patent ID: 8116402
Filing Date: 2012-02-14
Classification: H04L

Abstract:
1. A method for a cognitive radio, comprising: determining one or more criteria associated with an operating environment of an ultrawideband (UWB) transceiver, wherein the determination of the one or more criteria comprises processing a transformed signal at a host, the host received the transformed signal from a Media Access Control (MAC) layer, the MAC layer produced the transformed signal by compositing a plurality of signals received from Fast Fourier Transform (FFT) or Inverse Fast Fourier Transform (IFFT) Logic and the plurality of signals were received at a plurality of time periods; determining a set of actions based on the one or more criteria, where the set of actions comprise a set of transmission properties including a frequency range; and transmitting a signal from the UWB transceiver, wherein the signal adheres to the transmission properties so that when the signal is transmitted using a frequency spectrum comprising the frequency range the signal has a first power level within a first portion of the frequency spectrum substantially comprising the frequency range and the signal has a second power level in a second portion of the frequency spectrum associated with a potentially interfering signal that is substantially outside the frequency range, wherein the signal is shaped by applying a weight vector to one or more tones so that the first power level is higher than the second power level.