Teaching Rate Conversion Using Hardware-Based DSP

Abstract

To enable us to affordably teach software defined radio at the undergraduate level, we developed a low cost system that allows realistic hardware projects and demonstrations. This new board connects a Texas Instruments C67x DSP starter kit (DSK) to an Analog Devices AD9857 quadrature modulator. This modulator is capable of operating at up to 200 million samples per second (MS/s), with a carrier (or intermediate frequency) of up to 80 MHz. Baseband 14-bit in-phase and quadrature (I/Q) data are presented to the modulator, which can be programmed to interpolate the data at rates from 4 to 252 . The AD9857 is interfaced to the DSK using an Altera Cyclone FPGA which provides queuing of the I/Q data and the logic for control/programming of the modulator. This paper describes the associated hardware and software issues and briefly describes recommended classroom use.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2007
Accession Number
ADA490356

Entities

People

  • Cameron H. Wright
  • Michael G. Morrow
  • Thad B. Welch

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Application Software
  • Carrier Frequencies
  • Communication Systems
  • Computer Programming
  • Conversion
  • Digital Communications
  • Digital Signal Processing
  • Electrical Engineering
  • Engineering
  • Field Programmable Gate Arrays
  • Frequency
  • Graphical User Interface
  • Modulation
  • Modulators
  • Radio Communications
  • Signal Processing
  • Software Defined Radio

Readers

  • Parallel and Distributed Computing.
  • Radio communications and signal processing.