Dual mode modulated backscatter system

Details Dual mode modulated backscatter system Dual mode modulated backscatter system

H - Electricity

04

B

H04B 7/22 (2006.01) G01S 13/75 (2006.01) G06K 7/00 (2006.01)

Patent

CA 2177415

A radio communication system includes an Interrogator for generating and transmitting a first modulated signal by modulating a first information signal onto a radio carrier signal, the first information signal indicating in which of multiple response modes a receiving Tag should respond. One or more Tags of the system receive the first modulated signal and decode it to obtain the first information signal. A Backscatter Modulator modulates the reflection of the first modulated signal using a second information signal whose content, data rate, or modulation is determined by said first information signal, thereby forming a second modulated signal. The Interrogator receives and demodulates the second modulated signal to obtain the indicated second information signal.

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