Energy-efficient time-division radio that reduces the induction of baseband interference
AssigneeLucent Technologies Inc.
InventorJason Paul DeMont
Life of this patent
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Abstract
A method and apparatus are disclosed that mitigate the induction of baseband interference that can from time-division radios (e.g., radios that radiate an RF signal with a time-varying power envelope). A radio comprising an embodiment of the present invention radiates, in transmit mode, an information-bearing signal. In some or all idle modes, the radio radiates at least one energy-reducing pulse, but in an idle-mode channel. These energy-reducing pulses reduce the energy in the fundamental frequency component of the average RF power envelope of the radio and also reduce the energy in the harmonics of the fundamental frequency.
Claims20
A method for operating a time-division radio that periodically cycles between a transmit mode and an idle mode, said method comprising:
- during at least one transmit mode, radiating an information-bearing signal in a transmit-mode channel;
- and
- during at least one idle mode, radiating at least one energy-reducing pulse in an idle-mode channel, said energy-reducing pulse having a duration less than the duration of said idle mode;
- wherein said energy-reducing pulse reduces the energy in a fundamental frequency component of the average RF power envelope radiated by said time-division radio.
A method of operating a time-division radio that periodically cycles between a transmit mode and an idle mode, said method comprising:
- radiating a first signal during said transmit mode in at least one frequency-delimited transmit-mode channel;
- and
- radiating a second signal during at least one of said idle modes in an idle-mode channel, such that said second signal has an average RF power envelope that has a duration that is shorter than said idle model;
- wherein the second signal reduces the energy in a fundamental frequency component of the average RF power envelope of the time-division radio.
A time-division radio that periodically cycles between a transmit mode and an idle mode, said time-division radio comprising:
- a controller that generates at least one energy-reducing pulse to be transmitted during an idle-mode of said time-division radio, said energy-reducing pulse having a duration that is less than the duration of the idle mode and wherein the energy-reducing pulse reduces the energy in a fundamental frequency component of the average RF power envelope of the time-division radio;
- a carrier frequency generator;
- and
- a modulator responsive to said carrier frequency generator and said controller, said modulator operable to modulate a first carrier signal with an information-bearing signal during transmit mode and operable to modulate a second carrier signal with said energy-reducing pulses during said idle mode, said second carrier signal being different than said first carrier signal.
Dependencies are inferred from the claim text.