The signal processing method, apparatus and system for

Embodiment of the present invention discloses a signal processing method, apparatus and system wherein the method comprising: receiving a downlink signal carrying the uplink signal; signals using the estimated interference from the uplink signal to a first interference cancellation to the remaining uplink signal interference than the first interference threshold quantity, can be achieved without the use of a plurality of RF front-end or not using the duplexer can also signal an uplink downlink band interfering signals is minimized at the same RF front end, Since the embodiment of the present invention do not use duplexer filters, the base station can be improved and the cost and the difficulty of laying systems, power consumption can be reduced an additional mobile terminal.