Low power radio frequency to digital receiver
AssigneeThe Boeing Company
InventorsYen-Cheng Kuan, Zhiwei Xu
Life of this patent
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Abstract
A radio frequency to digital receiver has a modulator sampling a signal at a first rate. The receiver has at least one processing unit. The processing unit has a plurality of digital bandpass filters separating the signal and recombining the signal at a rate less than the first rate. The processing unit has a digital down converter adjusting frequency offset or centering the signal at the rate less than the first rate. The receiver has at least one rate control buffer coupled to adjacent processing units when two or more processing units are within the receiver.
Claims16
A digital receiver comprising:
- a modulator sampling a signal at a first rate;
- at least one processing unit comprising:
- a plurality of digital bandpass filters separating the sampled signal and recombining the sampled signal at a rate less than the first rate, and
- a digital down converter adjusting frequency offset or centering the recombined signal at the rate less than the first rate;
- and
- at least one rate control buffer coupled to adjacent processing units when two or more processing units are within the receiver.
A method for reducing power consumption on a radio frequency to digital receiver, the method comprising:
- receiving a signal;
- filtering the received signal;
- sampling the filtered signal at a first rate;
- in at least one processing unit:
- bypassing a digital down converter in the at least one processing unit by adjusting the first rate as a multiple of a processing rate of the at least one processing unit and a carrier frequency as a multiple of the processing rate of the at least one processing unit when the at least one processing unit is coupled to a modulator,
- separating the sampled signal into sub-bands at the processing rate less than the first rate,
- recombining the separated signal from the sub-bands at the processing rate;
- and
- correcting a frequency offset or centering the recombined signal at the processing rate.
Dependencies are inferred from the claim text.