1. A channel predicting method in a communication network comprising a time-varying wireless channel, the method comprising: determining a prediction strategy; selecting a certain number of channel samples from candidate channel samples in accordance with the prediction strategy, the channel samples each corresponding to one symbol in a time domain; determining prediction weights in accordance with the prediction strategy and statistical properties of the time-varying wireless channel; weighting the selected channel samples with the determined prediction weights to obtain a predicting channel sample as a prediction result.