Method and apparatus for eliminating same-frequency and adjacent-frequency interference in analog domain

A method of canceling co-channel and adjacent channel interference in an analog domain characterized in that, on-site detection and judgment of existing co-channel and/or adjacent-channel interference signal sources are performed on a wireless communication device with a receiving antenna at a transmission point;

• a reference signal of a co-channel and/or adjacent channel from an interference signal source is collected by direct connection of a cable or by adding an antenna;
• an analog co-channel and/or adjacent-channel interference signal is obtained;
• then in the analog domain, the co-channel and/or adjacent-channel interference signal is subtracted from a received signal received by the receiving antenna of the wireless communication device to complete analog interference cancellation processing, thereby obtaining an interference-eliminated RF (radio frequency) analog signal;
• wherein the on-site detection and judgment refers to:
• at the transmission point of the wireless communication device, detecting whether there are other authorized signals on the co-channel and adjacent channels, and determining whether the detected other authorized signals are interference signals by measuring signal intensity of the authorized signals at the transmission point of the wireless communication device.