Patent ID: 7102699

Claim:
A consumer electronic device comprising: circuitry configured to transmit a respective signal corresponding to a respective one of at least three radio frequency channels, the circuitry including: a modulator configured to modulate said signal such that each modulated signal includes first signal components in a predetermined frequency range corresponding to a selected one of the at least three radio frequency channels and second signal components that extend beyond the predetermined frequency range at frequencies higher and lower than the predetermined frequency range to overlap the respective predetermined frequency range of at least one adjacent one of the at least three radio frequency channels, and at least one notch filter configured to filter from said modulated signal a portion of the second components of the modulated signal exclusive of the first signal components wherein the modulator for a lowest one of the at least three radio frequency channels does not have a notch filter for filtering the second components of the modulated signal that extend beyond the predetermined frequency range at lower frequencies.