QM/PSK Voice/Data Modem

Lerner, T.; McChesney, J.

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QM/PSK Voice/Data Modem

1976-03-01
By Lerner, T. ; McChesney, J.

File Language:

English

Details

Creators:

Lerner, T. ; McChesney, J.
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:

AEROSAT Applications Technology Satellite ATS-6 Satellite DCPSK Encoder Digital Data Link Hybrid-modem Systems Modems Modulation (Communications) Quadrature Modulation Techniques Up-converter Modulator Voice Communication
Publication/ Report Number:

DOT-TSC-FAA-76-05 ; FAA-RD-76-63
Resource Type:

Tech Report
Corporate Publisher:

United States. Department of Transportation. Federal Aviation Administration
Abstract:

Two Quadrature Modulation/Phase Shift Keyed (QM/PSK) Voice/Data Modem systems have been developed as part of the satellite communications hardware for advanced air traffic control systems. These systems consist of a modulator and demodulator unti which provides for one-way communication of voice and/or data signals. The modulator and demodulator unit provides simultaneous transmission of analog voice and digital data signals multiplexed on a single carrier, using quadrature modulation techniques. The modem interfaces with the transmitter/receiver at 70 MHz intermediate frequency. The report contains design theory, circuit descriptions, diagrams, calibration procedures, and laboratory test results.
Content Notes:

Introduction, General description, Quadrature modulation techniques, System design, Modulator, voice processing, Data code generator, Quadrature modulator, Up-converter module, Demodulator, Down-converter, Coherent demodulator, C/N measurement, Audio processing, Data decoder and clock synchronization, Code synchronization and error detector, System test results, Voice intelligibility tests, Data error rate tests, Carrier acquisition, C/N calibration, Schematic diagrams, Appendix
Format:

PDF
Funding:

DOT-TSC-631
Collection(s):

Volpe Center
Main Document Checksum:

urn:sha256:29ea432ad31acf354123a37e6f3ade140f175ed1e1ea81063acce82fd7c2959c
Download URL:

https://rosap.ntl.bts.gov/view/dot/9276/dot_9276_DS1.pdf
File Type:

[PDF - 5.25 MB ]

File Language:

English

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