00000nam 2200000zi 4500 9.954358 CaOODSP 20250918123131 m o d f cr bn||||||||| 250821e199612 onca obt f000|0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn--- DR52-17/78-1996E-PDF Addison, Robin D. (Robin Douglas), 1960- author. Modified hopping synthesizer controller (U) / by Robin Addison. Ottawa : Defence Research Establishment Ottawa, December 1996. 1 online resource (xvi, 150 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier DREO report ; no. 1304 Digitized edition from print [produced by Defence Research and Development Canada]. "Project 5CA11." Includes bibliographical references (page 23). "Defence Research Establishment Ottawa is pursuing an in-house research activity in spread-spectrum technology to support development of robust, anti-jam satellite communications for the military. The in-house effort consists of developing a system simulator to research the techniques involved in spread-spectrum synchronization. For these experiments, a Hopping Synthesizer Controller is required to drive a frequency synthesizer, and is the subject of this report. The controller was built on a single board using a digital signal processor for calculations and an erasable programmable logic device for interfacing. It provides the pseudo-random hopping sequence, modulation, channel selection and Doppler precorrection. The Hopping Synthesizer Controller can drive the frequency synthesizer at hop rates up to 25 khops/s. Four configurations are supported: operation within either the payload or ground terminal simulator, for uplink or downlink. Each configuration supports commands from a Synchronization Controller and special uplink and downlink synchronization modes. In this document the software and hardware details are provided along with a user guide for the board"--Abstract, page iii. Includes abstracts in English and French. Radio Interference. Radio wave propagation. Electronic countermeasures. Radio Brouillage. Ondes radioélectriques Propagation. Contre-mesures électroniques. Defence Research Establishment Ottawa, issuing body. DREO report ; no. 1304. (CaOODSP)9.941661 PDF 5.17 MB https://publications.gc.ca/collections/collection_2025/rddc-drdc/DR52-17-78-1996-eng.pdf Project 5CA11