LTE-ICS interference self-cancellation system

The utility model discloses an LTE-ICS interference self-cancellation system which comprises an ADC analog-to-digital conversion module, a first compound frequency mixing processing unit, a DDC module, an ICS echo self-cancellation module, a DUC module, a second compound frequency mixing processing unit and a DAC digital-to-analog conversion module. The ICS echo self-cancellation module comprises a first accumulator circuit, a gain control circuit, a time-delay generation circuit, a filtering detection circuit and a second accumulator circuit. An output end of the first accumulator is connected with an input end of the gain control circuit. Output ends of the gain control circuit are connected with an input end of the time-delay generation circuit and an input end of the filtering detection circuit. An output end of the time-delay generation circuit is connected with an input end of the filtering detection circuit. An output end of the filtering detection circuit is connected in series with the first accumula