CHANNEL SIMULATION-DIGITAL VS. ANALOG.
INSTITUTE FOR TELECOMMUNICATION SCIENCES BOULDER CO
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A comparison is made of digital computers and specially constructed analog hybrid devices for simulation of random, time-variant, time- and frequency-dispersive channels. The comparison is made primarily on an economic basis however, emphasis is also given to the computer speed required for real- time digital simulation. A physically oriented channel model is presented. A cost analysis is presented. Typical troposcatter 1 MHz BW and 1 microsec. dispersion and HF 3 kHz BW and 1.5 ms dispersion channels are considered as specific examples. Present-day general purpose digital computers and the fastest signal processors available are shown to require approximately the same amount of computing time for simulation. Neither is capable of real-time simulation of either an HF or troposcatter channel. Author
- Radiofrequency Wave Propagation
- Radio Communications