US 2023/0198577 A1 · METHOD AND APPARATUS FOR ELIMINATING SAME-FREQUENCY AND ADJACENT-FREQUENCY INTERFERENCE IN ANALOG DOMAIN

Abstract

A method and device for eliminating co-frequency and adjacent frequency interference in an analog domain, in the case that a wireless communication device with a receiving antenna, that is, a transmitting point of a master device, detects and judges the presence of co-frequency and/or adjacent frequency interference signal sources on site, collects the reference signals of the same frequency and/or adjacent frequency from the interference signal sources by means of cable direct connection or adding an antenna, and obtains the analog signals of the same frequency and/or adjacent frequency interference after interference signal recovery processing, then, in the analog domain, the received signal received by the receiving antenna of the master device is directly subtracted from the interference analog signal of the same frequency and/or adjacent frequency to complete the analog interference cancellation process, so as to obtain the interference canceled RF analog signal.

Claims11

Dependent claims

A method of eliminating Co-frequency and adjacent frequency interference in the analog domain characterized in that, on-site detection and judgment of existing co-frequency and/or adjacent-frequency interference signal sources are performed on a wireless communication device with a receiving antenna, that is, a transmission point of the main device;

in this case, the reference signal of the same frequency and/or adjacent frequency from the interference signal source is collected by direct connection of the cable or by adding an antenna;
the domain directly subtracts the co-frequency and/or adjacent-frequency interference analog signal from the received signal received by the receiving antenna of the main device to complete the analog interference cancellation processing, thereby obtaining the interference-eliminated RF analog signal;
described on-site detection and judgment refers to:
at the transmission point of the main equipment, detect whether there are other authorized signals on its frequency point F N and adjacent frequency points FN+m and FNm, and by measuring the transmission point of the authorized signal;
the strength judges whether it belongs to the interference signal.

2 more elements

A system of eliminating Co-frequency and adjacent frequency interference in the analog domain characterized in that it includes:

an interference signal recovery module, and an interference recovery control module, wherein:
an input end of the interference signal recovery module receives directly or indirectly obtained;
the co-frequency and/or adjacent-frequency interference analog signal output by at least one interference signal is subtracted from the main received signal received by the receiving antenna of the main device and used as the input of the interference recovery control module and the subsequent processing module;
the interference recovery control module calculates according to the obtained index change trend results output the control signal to the interference signal recovery module to adjust/confirm the specific operations and parameters involved in the recovery process;
and the received signal is subtracted to eliminate the interference of the RF analog signal.

2 more elements

Dependencies are inferred from the claim text.

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

Life of this patent

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

Life of this patent

Abstract

Claims11