Accession Number:

AD0669283

Title:

CHANNEL SIMULATION-DIGITAL VS. ANALOG.

Descriptive Note:

Technical rept.,

Corporate Author:

INSTITUTE FOR TELECOMMUNICATION SCIENCES BOULDER CO

Personal Author(s):

• Quincy, E. A.

Report Date:

1968-03-01

Pagination or Media Count:

54.0

Abstract:

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

Descriptors:

• *INFORMATION THEORY
• SIMULATION
• HIGH FREQUENCY
• DIGITAL COMPUTERS
• INTEGRAL TRANSFORMS
• ANALOG COMPUTERS
• MULTIPATH TRANSMISSION
• TRANSFER FUNCTIONS
• REAL TIME

Subject Categories:

• Cybernetics
• Radiofrequency Wave Propagation
• Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE