Patent ID: 8514982
Filing Date: 2013-08-20
Classification: H04B

Abstract:
1. A frequency modulation (FM) receiver comprising: a radio frequency (RF) front-end that receives FM signals and down-converts the received frequency signals to intermediate frequency (IF) signals; at least one analog-to-digital converter (ADC) that receives the intermediate frequency signals and digitizes multiple FM channels around a desired FM channel associated with the down-converted signals; and multiple sets of digital processing components that are configured to simultaneously receive and process the digitized multiple channels, the multiple sets of digital processing components having at least two parallel channel selection and demodulation paths in which the respective digitized multiple channels are processed therethrough, wherein the multiple sets of digital processing components include a first set of digital processing components having a digital down-converter (DDC), a channel filter and a digital demodulator, the DDC being configured to select and down-convert to baseband a first channel of the digitized multiple channels and pass the selected first channel to the channel filter, the channel filter being configured to remove the image and other unwanted interference on either side of the selected first channel, the digital demodulator being configured to receive the filtered first channel and demodulate information from the filtered first channel, wherein the multiple sets of digital processing components include a second set of digital processing components having a digital down-converter (DDC), a channel filter and a digital demodulator, the DDC being configured to select and down-convert to baseband a second channel of the digitized multiple channels and pass the selected second channel to the channel filter, the channel filter being configured to remove the image and other unwanted interference on either side of the selected second channel, the digital demodulator being configured to receive the filtered second channel and demodulate information from the filtered second channel, wherein the at least one ADC includes first and second narrow-band bandpass analog-to-digital converters that are electrically coupled to the respective first set and second set of digital processing components, the first and second narrow-band bandpass analog-to-digital converters being configured to tune to the first and second channels, respectively.