Microwave Data Transmission Test Program – Quaternary Baseband Modem

摘要

The objective of the microwave data transmission test program - Quaternary baseband modem was to design, construct and conduct system tests on a quaternary baseband modulator/demodulator (Modem). The modem is designed to permit the passage of digital data traffic over conventional frequency division multiplex radios with baseband interface. 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 an IF interface (QPSK Modem). Of particular interest are the system test results, including bit error rate as a function of received signal level and transmitted spectral occupancy.