02-06-2016 дата публикации
Номер: US20160154111A1
A technology is provided for reducing pulsed radio frequency interference. The GPS signal may be received at a GPS device. The GPS device may include a GPS receiver. The GPS signal may include a plurality of sign and magnitude bits. Pulsed RFI may be detected in the GPS signal based on samples of the magnitude bits in the GPS signal. The pulsed RFI received at the GPS receiver may be reduced by communicating a blank signal when the samples of the magnitude bits indicate the pulsed RFI. 1. A method for reducing pulsed radio frequency interference (RFI) , the method comprising:receiving a GPS signal at a GPS device, wherein the GPS signal includes a plurality of sign and magnitude bits and the GPS device includes a GPS receiver;detecting pulsed RFI in the GPS signal based on samples of the magnitude bits in the GPS signal; andreducing the pulsed RFI received at the GPS receiver by communicating a blank signal when the samples of the magnitude bits indicate the pulsed RFI.2. The method of claim 1 , further comprising communicating the blank signal to the GPS receiver for a predefined time period.3. The method of claim 1 , further comprising communicating GPS signals that do not contain pulsed RFI to the GPS receiver claim 1 , the GPS signals including one or more intervals of blank signals.4. The method of claim 1 , further comprising communicating GPS signals that do not contain pulsed RFI to a selective availability anti-spoofing module (SAASM) included in the GPS device.5. The method of claim 1 , further comprising detecting pulsed RFI in the GPS signal by detecting at least 100 consecutive magnitude bits out of 128 samples indicate that the GPS signal contains the pulsed RFI.6. The method of claim 1 , further comprising lowering an automatic gain control (AGC) of the GPS device when 1280 consecutive samples of the magnitude bits do not indicate pulsed RFI.7. The method of claim 1 , further comprising:detecting the pulsed RFI in the GPS signal based on GPS signal ...
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