Accession Number:

ADA002840

Title:

Microwave Data Transmission Test Program - QPSK Modems.

Descriptive Note:

Final rept. Mar 73-Feb 74,

Corporate Author:

PHILCO-FORD CORP WILLOW GROVE PA COMMUNICATION SYSTEMS DIV

Personal Author(s):

• Jones,Norman G.
• Olevsky,Benjamin
• Konezelman,Robert J.
• Miedziua,Christopher A.

Report Date:

1974-11-01

Pagination or Media Count:

75.0

Abstract:

The objective of the Microwave Data Transmission Test Program - QPSK Modem, was to design, construct, and conduct systems tests on a 70 MHz Quadriphase Shift Keyed ModulatorDemodulator Modem. The modem is designed to permit the conveyance of digital data traffic over conventional frequency division multiplex radios with a 70 MHz intermediate frequency. Data rates from 1.536 Mbps to 12.95 Mbps, in 1 Kbps increments can be accommodated by the QPSK Modem. This program was performed concurrently with a program to develop a modem with a baseband interface Quaternary Baseband Modem. Of particular interest are the system test results including bit error rate as a function of received signal level and transmitted spectral occupancy.

Descriptors:

• *DATA TRANSMISSION SYSTEMS
• *MODEMS
• DIGITAL SYSTEMS
• ERRORS
• DATA RATE
• MICROWAVE COMMUNICATIONS
• PHASE SHIFT CIRCUITS

Subject Categories:

• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE