FM Video Data Link Spectrum Spreading.
Patent Application, Filed 8 Oct 91,
DEPARTMENT OF THE ARMY WASHINGTON DC
Pagination or Media Count:
A video data link system utilizes spread spectrum to decrease the susceptibility of a low power video link to radio frequency countermeasures. The video data link system utilizes a combination of spread spectrum direct-sequence modulation and frequency-hop along with frequency modulation to provide spectral spreading of radio frequency energy to a bandwidth much greater than the information bandwidth. The direct sequence modulation allows minimization of the number of frequency steps required for complete spectral filling of the operational bandwidth on an average basis. Frequency hop timing is determined from the phase of the direct sequence generator to simplify the frequency hop synchronization process in the receiver.
- Radiofrequency Wave Propagation