Method for determining quantity of passive intermodulation source and related device

An apparatus, comprising:

• memory storing instructions;
• one or more processors connected to the memory, wherein the one or more processors are configured to execute instructions to perform operations to:
• send a sounding signal using all carriers in a multi-antenna device to excite passive intermodulation sources of the multi-antenna device to generate an interference signal;
• receive the interference signal from the passive inter-modulation sources, wherein the passive intermodulation sources of the multi-antenna device generate the interference signal based on being excited by the sounding signal using all the carriers in the multi-antenna device;
• perform singular value decomposition on a first matrix corresponding to the interference signal;
• and
• determine a quantity of the passive inter-modulation sources based on a result of the singular value decomposition, the result of the singular value decomposition being a plurality of singular values and the quantity of the passive inter-modulation sources is based on value change trend of the plurality of singular values.

A non-transitory computer readable medium storing instructions that are executable by a processor, which when executed by the processor causes the processor to perform operations comprising:

• sending a sounding signal using all carriers in a multi-antenna device to excite passive intermodulation sources of the multi-antenna device to generate an interference signal;
• receiving the interference signal from the passive inter-modulation sources, wherein the passive intermodulation sources of the multi-antenna device generate the interference signal based on being excited by the sounding signal using all the carriers in the multi-antenna device;
• performing singular value decomposition on a first matrix corresponding to the interference signal;
• and
• determining a quantity of the passive inter-modulation sources based on a result of the singular value decomposition, the result of the singular value decomposition being a plurality of singular values and the quantity of the passive inter-modulation sources is based on value change trend of the plurality of singular values.