A radiowave propagation data acquisition system
By: Jeffrey B. Knorr
Contributors: Naval Postgraduate School (U.S.)
Publisher: Naval Postgraduate School
Published: 1979
Place of publication: Monterey, California
Language: eng
Number of pages: 32
Subjects: Radio; Data processing; Signal theory (Telecommunication); Radio wave propagation; Receivers and reception; Data transmission systems
Description: This report describes the hardware and software for implementation of a computer controlled system for the acquisition of radiowave propagation data. The system consists of an instrumentation receiver, a digital voltmeter to sample the detected IF output of the receiver, a digital clock, and a controller. Using the software described herein the system samples the received signal about seven times per second. The data samples are processed to provide hourly values of the average and median signal power levels and the number of fades of depth 10 db, 15 db, 20 db, 25 db and 30 db below the median signal level for the previous hour. The cumulative distribution of signal power level is determined for each day. Average duration of a fade of specified depth may be calculated from the above information. Processed data are stored in tape files. As currently configured the system will store data for an entire month. Tapes may be removed and replaced periodically to obtain a permanent record. The system has the capability to start up automatically after a power failure.
Notes: Title from cover.

"Prepared for: Naval Undersea Weapons Engineering Station, Keyport, Washington 98345" -- Cover.

"October 1978"--Cover.

"NPS62-79-001"--Cover.

"Report for the period October 1977 - September 1978"--Cover.

"Approved for public release; distribution is unlimited."

Technical report; 1978.

ck/ oclc 7/7/09.