Carrier modulation signal receiving and sending method, and corresponding receiver and transmitter

The invention provides a carrier modulation signal receiving method based on filtering, a carrier modulation signal sending method based on filtering, and a corresponding receiver and a transmitter. The receiving method comprises the following steps: determining inter-symbol interference by the receiver; determining the position of a detection window of the receiver according to the inter-symbol interference; and detecting and demodulating a received signal based on the position of the detection window of the receiver. According to the receiving method, the position of the detection window of the receiver is adjusted to greatly reduce the inter-symbol interference caused by symbol extension during time domain filtering, thereby reducing the error rate of the system and improving the link reliability of the system. The position of the detection window of the receiver is adjusted, and thus the receiver finds a balance point between the ability of defending a fading channel and the ability of defending the inter-symbol interference caused by symbol extension.