IMPLEMENTATION OF AN FSK MODEM USING THE TMS320C17 (CONTAINS SCANNED TEXT)

This report presents a complete hardware design for a splitband modem, and the software to implement a V.21/Bell 103 300-bps modem, using a TMS320C17 DSP.

- The first section reviews basic modem concepts and definitions and introduces frequency shift keying (FSK) data modulation.

- The second section describes the major functional blocks of the FSK modem system.

- Host Interface

- Modem Controller

- Digital Signal Processor

- Analog Front End

- The third section discusses DSP software implementation of the V.21/Bell 103 300-bps modem, using a TMS320C17 DSP.

- The fourth section reviews some issues involved with incorporating additional code into DSP software provided in Appendix B.

- The fifth section summarizes conclusions.

- Appendix A is a derivation of the filter coefficient value required for the sample fraction time delay.

- Appendix B is the source code listing for the TMS320C17 modem implementation.

The report also includes flow chart and tabular frequency and phase step data.

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
Trademarks, Important Notice!