Radio communication apparatus

Details Radio communication apparatus Radio communication apparatus

2007-05-22

2007-05-22

Le, Lana (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Earth or water medium

C455S039000, C455S041100, C340S010100, C332S103000, C375S279000, C375S280000

Reexamination Certificate

active

10537490

ABSTRACT:
A communication apparatus operating under a back scattering system involving processes of QPSK modulation is provided. The apparatus includes: a first signal channel for acquiring a first reflected wave by getting an incoming radio wave directly reflected without wave passage through any phase shifter; a second signal channel for acquiring a second reflected wave having a phase shifted by π/2 relative to the phase of the first reflected wave through two-way wave passage through a first phase shifter alone; a third signal channel for acquiring a third reflected wave having a phase shifted by π relative to the phase of the first reflected wave through two-way wave passage through the first and a second phase shifter; and a fourth signal channel for acquiring a fourth reflected wave having a phase shifted by 3π/2 relative to the phase of the first reflected wave through two-way wave passage through the first through a third phase shifter.

REFERENCES:
patent: 2001/0001758 (2001-05-01), Greeff et al.
patent: 10-145103 (1998-05-01), None
patent: 2001-24549 (2001-01-01), None
patent: 2001-024549 (2001-01-01), None

Affiliated with

Also associated with

Rating

Radio communication apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Radio communication apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio communication apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3762470