Patent ID: 11876546
Assignee: CHINA ELECTRONICS TECHNOLOGY AVIONICS CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An anti-interference system comprising a first airborne electromagnetic wave device, a second airborne electromagnetic wave device and a controller, wherein
the first airborne electromagnetic wave device and the second airborne electromagnetic wave device are each connected to the controller;
an operating frequency band of the first airborne electromagnetic wave device is overlapped with an operating frequency band of the second airborne electromagnetic wave device;
a transmission channel of an interfered airborne electromagnetic wave device is provided with an electrically tunable filter;
the controller is configured to:
calculate, in a case that an interfering airborne electromagnetic wave device is powered-on, an interfered band based on an operating frequency and a bandwidth of the interfering airborne electromagnetic wave device; and trigger an operation that the interfered airborne electromagnetic wave device controls the electrically tunable filter to filter out signals within the interfered band, wherein

the interfered airborne electromagnetic wave device is the first airborne electromagnetic wave device, and the interfering airborne electromagnetic wave device is the second airborne electromagnetic wave device; or
the interfered airborne electromagnetic wave device is the second airborne electromagnetic wave device, and the interfering airborne electromagnetic wave device is the first airborne electromagnetic wave device;
wherein the controller calculating the interfered band based on the operating frequency and the bandwidth of the interfering airborne electromagnetic wave device comprises:
determining a sum of the operating frequency and a first bandwidth as an upper limit, and determining a difference between the operating frequency and the first bandwidth as a lower limit, to acquire the interfered band, wherein the first bandwidth is a sum of the bandwidth and a preset transition protection bandwidth.