Patent ID: 7499690

Claim:
A method of timing the exchange of data signals via a digital data link between radio frequency (“RF”) radio circuits and a base band processor to minimize electromagnetic emissions causing interference (“EMI”), the method comprising: generating a fixed clock signal having a fixed frequency; forming a modulation signal having a waveform shaped to spread a first subset of frequencies in a range of frequencies above a first frequency and to spread a second subset of frequencies in said range of frequencies below said first frequency; adjusting an amplitude of said modulation signal representing a frequency by a first increment to form slope portions of said waveform between a maximum amplitude and a minimum amplitude that respectively determine a maximum frequency and a minimum frequency; and generating said variable data rate based on said modulation signal composed of said slope portions of said waveforms, wherein said first subset and said second subset of frequencies set a zero direct current (“zero DC”) spectral offset with respect to said fixed frequency; modifying inflections of said waveform by a second increment to form inflection portions of said waveform; generating said variable data rate based on said modulation signal composed of both said slope portions and said inflection portions of said wavetbrms, said second increment being configured to reduce peaking of an emission profile for electromagnetic emissions; centering said first frequency at said fixed frequency; and establishing an average data rate based on an average of said range of frequencies.