Patent ID: 7769359
Filing Date: 2010-08-03
Classification: H04B

Abstract:
1. An adaptive wireless receiver for processing a radio frequency (RF) signal to support multiple standards, comprising: an antenna for receiving the RF signal; a bandpass filter (BPF) for filtering the RF signal; a front-end unit for processing the filtered signal from the BPF and generating digitalized signals; and a demodulator for demodulating the digitalized signals, wherein the front-end unit executes channel selection when the adaptive wireless receiver operates in a zero intermediate frequency (ZIF) mode and executes image rejection when the adaptive wireless receiver operates in a low intermediate frequency (LIF) mode, the front-end further comprising: a low noise amplifier (LNA) for amplifying the filtered RF signal, a first mixer for converting the amplified RF signal from RF to IF and generating an in-phase (I) signal, a second mixer for converting the amplified RF signal from RF to IF and generating a quadrature-phase (Q) signal, a single analog filter for filtering the I signal and Q signals, wherein cutoff frequencies of the single analog filter are selected as a bandwidth of a desired channel in the LIF mode, a first analog-to-digital converter (ADC) for converting the filtered I signal from analog to digital, a second ADC for converting the filtered Q signal from analog to digital, and a digital filter for filtering the digitalized I and Q signals.