System for discriminating multiple backscatter-modulated...

G - Physics – 01 – S

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

343/19

G01S 13/02 (2006.01) G01S 13/82 (2006.01)

Patent

CA 1332973

The invention provides a system for discriminating between modulated backscattered signals based upon trans- mission-to-reception time delay. The system employs a carrier, phase-modulated with a modulating signal, having character- istics which provide unity output when correlated with itself with zero time shift and a substantially lower output level when correlated with itself with a significant time shift. The system works with a backscatter-modulator located a finite distance from the transmitter for receiving and modulating the backscatter of the carrier. A receiver/detector receives and detects the modulated backscattered phase-modulated signal, the detector being phase-sensitive and having as a reference signal the transmitted phase-modulating carrier signal, and having as an input signal the phase modulated backscattered carrier. The detector provides an output signal whose averaged amplitude is substantially dependent upon the degree of phase correlation between the phase of the modulation returned input signal and the reference signal. Finally, the output signal from the detector is selectively processed only when its averaged amplitude is above a threshold level. In a preferred embodiment, the transmitted signal is a spread spectrum signal. A preferred application is in signal discrimination in toll road collection lanes.

601159

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

System for discriminating multiple backscatter-modulated... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for discriminating multiple backscatter-modulated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for discriminating multiple backscatter-modulated... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1306831

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.