Interference cancellation method and apparatus, filter device

An interference cancellation apparatus, comprising a processor and a non-transitory processor-readable medium having processor-executable instructions stored thereon, which when executed by the processor cause the processor to execute the following:

• dividing a transmitted signal into a first transmitted signal and a second transmitted signal, and then inputting the first transmitted signal into a first transmitting filter and inputting the second transmitted signal into a second transmitting filter symmetric to the first transmitting filter;
• adjusting a first interfering signal and a second interfering signal to obtain signals of opposite phases,
• wherein the first interfering signal comprises at least one of the following:
• a) a part of the first transmitted signal which is leaked from the first transmitted signal into a receiving channel after the first transmitted signal flows through the first transmitting filter and a first receiving filter, and
• b) an intermodulation signal derived from the first transmitted signal,
• wherein the second interfering signal comprises at least one of the following:
• c) a part of the second transmitted signal leaked from the second transmitted signal into the receiving channel after the second transmitted signal flows through the second transmitting filter and a second receiving filter, and
• d) an intermodulation signal derived from the second transmitted signal;
• and
• wherein the receiving channel is a channel for a receiver to receive signals;
• combining the signals of the opposite phases.

A base station, comprising an interference cancellation apparatus, wherein the interference cancellation apparatus comprises a processor and a non-transitory processor-readable medium having processor-executable instructions stored thereon,

• which when executed causes the processor to implement the following:
• dividing a transmitted signal into a first transmitted signal and a second transmitted signal, and then inputting the first transmitted signal into a first transmitting filter and inputting the second transmitted signal into a second transmitting filter symmetric to the first transmitting filter;
• adjusting a first interfering signal and a second interfering signal to obtain signals of opposite phases,
• wherein the first interfering signal comprises at least one of the following:
• a) a part of the first transmitted signal which is leaked from the first transmitted signal into a receiving channel after the first transmitted signal flows through the first transmitting filter and a first receiving filter, and
• b) an intermodulation signal derived from the first transmitted signal,
• wherein the second interfering signal comprises at least one of the following:
• c) a part of the second transmitted signal leaked from the second transmitted signal into the receiving channel after the second transmitted signal flows through the second transmitting filter and a second receiving filter, and
• d) an intermodulation signal derived from the second transmitted signal;
• and
• wherein the receiving channel is a channel for a receiver to receive signals;
• and
• combining the signals of the opposite phases.