Transmitter apparatus and communication method including...

H - Electricity – 04 – B

Patent

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H04B 7/06 (2006.01) G01S 13/74 (2006.01) H04B 7/08 (2006.01)

Patent

CA 2316424

In a communication apparatus and communication method, transmission is carried out using interference waves generated by the interference of electromagnetic waves emitted simultaneously from a plurality of antennas, in which the emission conditions of the electromagnetic waves (e.g., phase, frequency, output level) are changed to create interference antinodes where reception is possible and interference nodes where reception is not possible at prescribed positions in space, and wherein a position detection method for detecting the position of a receiver is carried out based on reception data related to the electric field strength E and the rate of change of E (derivatives of E) at the position of the receiver.

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