This thesis reports on an investigation of a practical solution to the problem of providing covert, secure protection to the video channel of a remotely piloted vehicle (RPV) down-link. Spread spectrum technology employing acoustic surface wave devices and Golay complementary code sequences are utilized. Bandwidth reduction of the video data to a data rate of 200 kilobits per second is assumed. A discussion of the need for such a system and the qualities that a successful system should possess is included in the introduction. Problems inherent in providing an adequate video link for military RPV usage are examined. The thesis effort results in a transmitter/receiver combination with many of the desirable qualities of a video link for military RPV employment in a hostile environment. The hardware contains modifications that were made to facilitate system testing. Tests results are reported. The emphasis of the thesis is on the satisfaction of the system specifications through hardware implementation.

Approved for public release; distribution is unlimited.

http://archive.org/details/aspreadspectrumc1094517248

Lieutenant Commander, United States Navy