An experimental modem for HF channels using spread-spectrum and block encoding
Abstract
An experimental program was developed to investigate the performance of a spread spectrum HF modem, designed to combat multipath and interference effects. The design of a prototype system is outlined, and performance results are discussed. The features of the modem included automatic synchronization, diversity operation, provision for an ARQ mode, and more elaborate coding methods.
- Publication:
-
In AGARD Aspects of Electromagnetic Wave Scattering in Radio Commun. 5 p (SEE N79-10299 01-32
- Pub Date:
- September 1978
- Bibcode:
- 1978aews.agarU....S
- Keywords:
-
- Coding;
- High Frequencies;
- Modems;
- Spread Spectrum Transmission;
- Electromagnetic Scattering;
- Multipath Transmission;
- Radio Communication;
- Radio Frequency Interference;
- Communications and Radar