Direct conversion receiver capable of supporting multiple standard specifications in a mobile communication system

摘要

Disclosed is a direct conversion receiver capable of supporting multiple standard specifications in mobile communication systems. A mode switch selects a received signal having a specific standard specification from received signals according to a mode selection signal. A low-noise amplifier is turned on in response to the mode selection signal, and low-noise amplifies the signal selected by the mode switch. A frequency down-converter frequency down-converts the low-noise amplified signal to a frequency corresponding to the specific standard specification. A high-pass filter bank high-pass filters the frequency down-converted signal. A programmable analog-to-digital converter converts the high-pass filtered signal into a sampling frequency corresponding to the specific standard specification. A digital filter digital-filters the converted digital signal using a decimation rate and a filter bandwidth corresponding to the specific standard specification. A digital signal processor generates the mode selection signal, and a control signal for generating the sampling frequency.