Anti-aliasing channel estimating apparatus, method and receiver

The embodiment of the invention provides an anti-aliasing channel estimating apparatus and method and a receiver. The channel estimating method includes the steps of conducting clock recovery and data synchronization for received multicarrier signals with channel aliasing, acquiring synchronized time domain signals and sampling phase, calculating aliasing estimated signals passing a channel based on trained sequence and the sampling phase, and acquiring the channel response and aliasing signal response of each subcarrier based on the estimated signal and frequency domain signal. Channel estimation for multicarrier signals with channel aliasing can be conducted accurately, the influence of channel aliasing on bit error ratio can be reduced, and the transmission quality of a system can be improved.