Electronic device in wireless communication system, wireless communication system and method

The invention relates to an electronic device in a wireless communication system, a wireless communication system and a method. The electronic device comprises a receiving unit, an analysis filter unit, and an interference cancellation unit, wherein the receiving unit is configured to receive signals of other electronic devices in the wireless communication system; the analysis filter unit is configured to set an analysis filter group based on parameters of an incomplete-reconstruction filter group and use the analysis filter group to decompose the signals received by the receiving unit into multiple paths of sub-band signals and carry out analysis filter; and the interference cancellation unit is configured to cancel inter-sub band interference in each path of sub-band signals based on each path of sub-band signals and adjacent sub-band signals for each path of sub-band signals in the multiple paths of sub-band signals. When the electronic device in the wireless communication system, the wireless communication system and the method are used, any filter design method is allowed to be used as long as frequency band segmentation requirements are met, the design of the filter does not need to strictly follow the complete reconstruction characteristics, and thus, the design flexibility of the wireless communication system can be greatly improved.