Patent ID: 7403556

Claim:
A method for a wireless receiver capable of handling signals of different modes by a common ADC (analog-to-digital converter), comprising; receiving a transmitted radio frequency (RF) signal; down-converting the transmitted RF signal into a baseband signal; analog-to-digital converting the baseband signal into a primary digital signal with a basic data rate by the common ADC (analog-to-digital converter); processing the primary digital signal according to a first data rate not higher than the basic data rate to detect whether the primary digital signal with the first data rate carries information of a first predetermined mode; down-converting the primary digital signal into a second data rate lower than the basic data rate and then processing the primary digital signal according to the second data rate to detect whether the primary digital signal with the second data rate carries information of a second predetermined mode; and temporarily stopping processing the primary digital signal according to the second data rate when the information in the primary digital signal meets the first predetermined mode, or temporarily stopping processing the primary digital signal according to the first data rate when the information in the primary digital signal meets the second predetermined mode; wherein the basic data rate is an integer multiple of the data rate of a least distortion-tolerant modulation format corresponding to one of the first predetermined mode and the second predetermined mode.