Methods and apparatus for a spread spectrum modulated...

Details Methods and apparatus for a spread spectrum modulated... Methods and apparatus for a spread spectrum modulated...

G - Physics

09

F

G09F 9/00 (2006.01) G08C 17/02 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2396417

Techniques for an electronic shelf label (ESL) system which uses a digital modulation technique for a modulated backscatter uplink from an ESL to a communication base station (CBS) which utilizes pseudo-random sequences instead of a single continuous wave frequency. The CBS transmits a message to an ESL using a Manchester coded amplitude modulated carrier. After receiving the message, the ESL responds by reflectively modulating a continuous wave (CW) signal with a pseudo-random code sequence. Multiple pseudo-random code sequences may be chosen, with each code sequence corresponding to a particular response. The code sequence is modulated onto a kHz carrier which is used to reflectively modulate the CW signal received from the CBS. The CBS then receives the reflectively modulated signal and correlates the received signal to determine message transmitted.

Affiliated with

Also associated with

Rating

Methods and apparatus for a spread spectrum 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 Methods and apparatus for a spread spectrum modulated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for a spread spectrum modulated... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1859356