资料介绍
【应用手册】Polyphase Modulation Using a FPGA for High-Speed Applications
This application note reviews and analyzes a polyphase modulation
scheme that generates high-frequency intermediate frequency (IF) carrier
signals in digital IF modems using an Altera® FPGA. Modulating IF
signals to higher carrier frequencies takes full advantage of the high
sampling rate of modern digital-to-analog converters and eases the
requirement for analog voltage-controlled oscillators (VCO) and mixers.
This application note presents a mathematical model of the polyphase
system which provides insights into system parameter selections. In
particular, this application note discusses the polyphase filter design. Polyphase Modulation Using
a FPGA for High-Speed
Applications
February 2008, version 1.0 Application Note 511
Introduction This application note reviews and analyzes a polyphase modulation
scheme that generates high-frequency intermediate frequency (IF) carrier
signals in digital IF modems using an Altera FPGA. Modulating IF
signals to higher carrier frequencies takes full advantage of the high
sampling rate of modern digital-to-an