DSP-Based Radio with IF Processing

Digital Signal Processing (DSP) is applicable to many types of wireless products and systems, and automotive AM/FM receivers are no exception. Processing intermediate-frequency (IF) radio signals in DSP is the logical extension of baseband and audio DSP already commonplace, and is enabled by current analog-to-digital (A/D) technology and digital logic densities. This paper describes the functionality and development of a DSP integrated circuit providing complete IF, baseband, and audio processing for automotive receivers.