Patent ID: 8077795

Claim:
A method of mitigating interference between a first radio operating in a wide frequency band and a second radio operating in a narrow frequency band within the wide frequency band, said method comprising: creating by the first radio, a transmitter notch of decreased transmit power centered at a selected frequency in the wide frequency band, said selected frequency having a position in the wide frequency band that is fixed in relation to a wideband carrier frequency of a transmitted signal, said creating step including: creating the notch by a fixed high-Q filter at an intermediate frequency (IF) stage of the first radio's wideband transmitter; and up-converting the signal to RF utilizing an LO frequency such that the resulting notch frequency F notch coincides with the second radio's narrowband carrier frequency; and adjusting the wideband carrier frequency so that the frequency of the transmitter notch is aligned with the second radio's narrowband carrier frequency.