An interference-robust receiver for a wireless communication system comprising: a radio frequency signal processor for providing an RF signal; and a frequency conversion interface comprising: a passive mixer for generating an intermediate frequency signal by down-converting an in-band part of the RF signal to a passband of a filter; and down-converting an out-of-band part of the RF signal to a stopband of the filter; and the filter for filtering the intermediate frequency signal with the passband and the stopband, wherein the filter is a passive filter; and an analog signal processor for processing the filtered intermediate frequency signal, characterized in that: the frequency conversion interface is arranged to reject the down-converted out-of-band part of the RF signal so as to prevent the analog signal processor from being saturated by the generated intermediate frequency signal by designing the corner frequency of the filter such that the down-converted in-band part is in the passband of the filter, while the down-converted out-of-band part is in the stopband of the filter. a radio frequency signal processor for providing an RF signal; and a frequency conversion interface comprising: a passive mixer for generating an intermediate frequency signal by down-converting an in-band part of the RF signal to a passband of a filter; and down-converting an out-of-band part of the RF signal to a stopband of the filter; and the filter for filtering the intermediate frequency signal with the passband and the stopband, wherein the filter is a passive filter; and an analog signal processor for processing the filtered intermediate frequency signal, characterized in that: the frequency conversion interface is arranged to reject the down-converted out-of-band part of the RF signal so as to prevent the analog signal processor from being saturated by the generated intermediate frequency signal by designing the corner frequency of the filter such that the down-converted in-band part is in the passband of the filter, while the down-converted out-of-band part is in the stopband of the filter. a passive mixer for generating an intermediate frequency signal by down-converting an in-band part of the RF signal to a passband of a filter; and down-converting an out-of-band part of the RF signal to a stopband of the filter; and the filter for filtering the intermediate frequency signal with the passband and the stopband, wherein the filter is a passive filter; and an analog signal processor for processing the filtered intermediate frequency signal, characterized in that: the frequency conversion interface is arranged to reject the down-converted out-of-band part of the RF signal so as to prevent the analog signal processor from being saturated by the generated intermediate frequency signal by designing the corner frequency of the filter such that the down-converted in-band part is in the passband of the filter, while the down-converted out-of-band part is in the stopband of the filter. the frequency conversion interface is arranged to reject the down-converted out-of-band part of the RF signal so as to prevent the analog signal processor from being saturated by the generated intermediate frequency signal by designing the corner frequency of the filter such that the down-converted in-band part is in the passband of the filter, while the down-converted out-of-band part is in the stopband of the filter.