Highly-Secure Wireless Communication System
AssigneeHitachi, Ltd.
InventorKen TAKEI
Life of this patent
Estimating the term…
Abstract
A highly-secure wireless communication system has a transmitter for transmitting the same information at predetermined polarized wave angles having different rotation-polarized waves for rotating the polarized waves of a carrier wave, and a receiver for restoring the reception information at the aforementioned predetermined polarization wave angles and for comparing the restoration results of the predetermined polarization wave angles with one another.
Claims19
A highly secure wireless communication system comprising:
- a transmitter that transmits one piece of information at predetermined different angles of polarization of a circularly polarized wave with which a carrier is circularly polarized;
- and
- a receiver that restores receiving information in relation to the predetermined angles of polarization, and compares the results of restoration, which relate to the predetermined angles of polarization, with one another.
A highly secure wireless communication system comprising:
- a transmitter that transmits one piece of information at predetermined different angles of polarization of a circularly polarized wave with which a carrier is circularly polarized, acquires propagation information transferred between the transmitter and a receiver, and uses the propagation information as a key to encrypt the information;
- and
- a receiver that receives the encrypted information.
An elevator control system wherein a wireless unit including a transmitter, which transmits one piece of information at predetermined different angles of polarization of a circularly polarized wave with which a carrier is circularly polarized, and a receiver, which restores receiving information in relation to the predetermined angles of polarization and compares the results of restoration, which relate to the predetermined angles of polarization, with one another is disposed at each of an elevator and a building in which the elevator is installed.
A transforming facility monitoring system wherein a wireless unit including a transmitter, which transmits one piece of information at predetermined different angles of polarization of a circularly polarized wave with which a carrier is circularly polarized, and a receiver, which restores receiving information in relation to the predetermined angles of polarization and compares the results of restoration, which relate to the predetermined angles of polarization, with one another is disposed at each of transforming apparatuses and base stations located in the vicinity of the transforming apparatuses.
Dependencies are inferred from the claim text.