Full duplex modulated backscatter system

Details Full duplex modulated backscatter system Full duplex modulated backscatter system

1995-06-19

1997-07-15

Pham, Chi H.

Telecommunications

Transmitter and receiver at separate stations

455106, 455 73, 455517, 342 51, 370280, H04B 140, H04B 159

Patent

active

056492960

ABSTRACT:
A duplex radio communication system includes an Interrogator which generates a first modulated signal by modulating a first information signal onto a radio carrier signal. The Interrogator transmits the first modulated signal to at least one remote Tag of the system. The remote Tag receives and processes the first modulated signal received at its Antenna. A Backscatter Modulator uses a second information signal to modulate the reflection of the first modulated signal from the Antenna, the reflected signal being a second modulated signal. The Interrogator receives and demodulates the second modulated signal to obtain the second information signal.

REFERENCES:
patent: 4075632 (1978-02-01), Baldwin et al.
patent: 4360810 (1982-11-01), Landt
patent: 5124985 (1992-06-01), Hoshikawa
patent: 5252979 (1993-10-01), Nysen
patent: 5317309 (1994-05-01), Vercellotti et al.
patent: 5430441 (1995-07-01), Bickley et al.

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