Patent ID: 11879655
Assignee: LG ELECTRONICS INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC F  H | IPC F  H

Claim 0:
1. An air conditioner, comprising:
a plurality of indoor units configured to be distributed and installed in a plurality of floors in a building;
a controller configured to monitor and control the plurality of indoor units; and
a wireless communication unit configured to transmit and receive data by the controller, the plurality of indoor units, and one outdoor unit using a wireless communication method, wherein the wireless communication unit comprises a transmitter and a receiver using a Sub-GHz band frequency, wherein the transmitter comprises:
an optical orthogonal code generator configured to first cipher source data using an optical orthogonal code; and
a narrow-band chaotic signal generator configured to secondarily cipher by using a chaotic signal, and wherein the source data is sequentially encrypted through the optical orthogonal code generator and the narrowband chaotic signal generator and then transmitted.