Implementation of an extended simulator for the HF channel on a multi-DSP board

• Published in: 7th International Conference on High Frequency Radio Systems and Techniques pp. 373 - 377
• Main Authors: Van der Perre, L, Van de Capelle, A, Ade, M, Lauwereins, R
• Format: Conference Proceeding
• Language: English
• Published: London IEE 1997
• Subjects: Applied sciences; Communications computing; Digital signal processing; Digital signal processing chips; Exact sciences and technology; Microprocessors and microcomputers; Modems; Radio links and equipment; Radiocommunications; Radiowave propagation; Semiconductor integrated circuits; Simulation techniques; Software engineering techniques; Telecommunications; Telecommunications and information theory; modems; software prototyping; Graphical Rapid Prototyping Environment; frequency dependencies; extended simulator; digital simulation; wideband modem testing; telecommunication computing; propagation parameters; adaptive signal processing; structural variations; multiDSP board; adaptive algorithm; telecommunication equipment testing; wide bandwidths; modular design; radio equipment; Watterson model; HF channel; general purpose DSP boards; subbands; Grape; HF radio propagation; channel model; adaptive equalisers; digital signal processing chips; hardware implementation; wideband signal processing
• ISBN: 0852966881; 9780852966884
• ISSN: 0537-9989
• DOI: 10.1049/cp:19970823

An extended model for the HF channel is being implemented on a multi-DSP board. As a channel model, an extension of the Watterson (1970) model is proposed, adjusted to encompass both frequency dependencies to serve as a basis for testing wideband modems, and structural variations of the propagation parameters to subject modems using adaptive algorithms and equalisers to proper test conditions. The implementation of the model on a multi-DSP board is accomplished using `Grape' (Graphical Rapid Prototyping Environment). The hardware implementation has to cope both with the complex channel model and the wide bandwidths of the signals that have to be treated. The use of general purpose DSP boards enables a modular and flexible design, which is kept as close to the physical phenomena as possible. There is an option for a division in subbands in order to simplify the processing of wideband signals.