On the Use of Rapid Prototyping for Designing PCM/FM Demodulators in FPGAS

Abstract

This paper describes the use of an efficient FPGA design flow, called Ogre, developed at BYU to design and implement PCM/FM demodulators. Ogre exploits the notion of reuse by taking advantage of a library of specially designed cores parameterized by XML metadata. A judicious choice of library cores, targeted to signal processing functions common to sampled data modulators and demodulators, reduces the design and test cycle time. We demonstrate this by using the tool to construct rapid prototypes of three different versions of FM demodulators and show that the bit error rate performance is comparable to demodulators on the market today.