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US 2014/0213197 A1Published application
Signal detection using a wide/narrow-band rf transceiver
OwnerWei An, Yosef Steininventors
Life of this patent
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Abstract
A wide/narrow-band RF transceiver receives a signal in wide-band RF spectrum; a processor analyzes the signal and narrows the bandwidth of the RF transceiver in accordance with a carrier frequency, bandwidth, and RF modulation type of the signal.
Claims23
A method for adjusting a bandwidth of a receiver detecting an RF signal, the method comprising:
- listening to a wide bandwidth of RF frequencies, the bandwidth being divided into a plurality of power-spectrum bins;
- detecting which of the plurality of power-spectrum bins are active;
- estimating a carrier frequency and bandwidth of the signal based on the detected active power-spectrum bins;
- and
- narrowing the bandwidth of the receiver in accordance with the estimated frequency and bandwidth.
2 more elements
A system for detecting an RF signal, the system comprising:
- an RF transceiver for receiving an RF signal, the RF transceiver having a wide-bandwidth mode and a narrow-bandwidth mode;
- a controller for (i) operating the RF transceiver in the wide-bandwidth mode to detect a signal in the wide bandwidth, (ii) estimating a carrier frequency and bandwidth of the signal, and (iii) operating the RF transceiver in the narrow-bandwidth mode to receive a narrow bandwidth determined in accordance with the estimated frequency and bandwidth.
A digital-signal processor comprising:
- an RF transceiver for receiving an RF signal, the RF transceiver having a wide-bandwidth mode and a narrow-bandwidth mode;
- a digital-signal processor core for (i) operating the RF transceiver in the wide-bandwidth mode to detect a signal in the wide bandwidth, (ii) estimating a carrier frequency and bandwidth of the signal, and (iii) operating the RF transceiver in the narrow-bandwidth mode to receive a narrow bandwidth determined in accordance with the estimated frequency and bandwidth.
Dependencies are inferred from the claim text.