Method for processing RF signal and RF receiver

A method for processing a radio-frequency (RF) signal is provided. The method comprises: amplifying the RF signal; digitizing, with a delta-sigma analog-to-digital converter (ADC), the RF signal in an RF domain, wherein the digitizing comprises: filtering the RF signal with an nth order resonant bandpass filter, where n>1; sampling the filtered RF signal in an ith Nyquist zone, where i>1; and producing an in-phase (I) signal and a quadrature (Q) signal digitally based on the sampled signal. With the above-mentioned techniques, RF receiver can enhance a noise immunity and reduce a power consumption.