Patent ID: 7652979

Claim:
A method of transmitting an ultrawideband (UWB) signal that is composed of an orthogonal frequency-division multiplexing (OFDM) based signal that is transmitted in an underlay manner and an prolate spheroidal wavelet function based impulse radio based signal that is transmitted in an overlay manner, wherein the UWB signal further comprises an underlay wireless system transmission power limit set by a regulatory agency the method comprising the steps of: determining a power level for each of a plurality of carriers within the UWB signal; classifying each one of the plurality of carriers of the channel as being an interfered carrier or a non-interfered carrier based on the power level for each one of the plurality of carriers; transmitting an OFDM signal on the interfered carriers at a signal power that is not greater than the underlay wireless system transmission power limit set by the regulatory agency; and transmitting a prolate spheroidal wavelet function based impulse radio signal on the non-interfered carriers at a signal power that is greater than the underlay wireless system transmission power limit set by the regulatory agency.