Patent ID: 8379757

Claim:
A method, comprising: generating a baseband signal indicative of one or more symbols; modulating the baseband signal at a carrier frequency to produce a modulated signal; transmitting the modulated signal via a wireless channel; and providing a clock signal to control, in the baseband signal, a duration of the one or more symbols, wherein providing the clock signal comprises (i) selectively using a first clock frequency to generate a first baseband signal having a first bandwidth and (ii) selectively using a second, lower clock frequency to generate a second baseband signal having a second, lower bandwidth, and wherein the second clock frequency is used to extend a wireless communication range of the wireless channel, and wherein generating the baseband signal comprises (i) generating in accordance with the first clock frequency one or more first preamble symbols based on a pre-determined preamble sequence when the first clock frequency is used, and (ii) generating in accordance with the second clock frequency one or more second preamble symbols based on the pre-determined preamble sequence such that the one or more second preamble symbols have a longer duration than the one or more first preamble symbols when the second clock frequency is used.