00000nam 2200000zi 4500 9.954366 CaOODSP 20250918125248 m o d f cr bn||||||||| 250821e199611 oncad obt f000|0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn--- DR52-17/80-1996E-PDF Tom, Caroline, 1967- author. Multichannel M-ARY frequency-shift-keying block demodulator implementation (U) / by Caroline Tom and Zaiqing Meng. Ottawa : Defence Research Establishment Ottawa, November 1996. 1 online resource (1 volume (various pagings)) : illustrations, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier DREO report ; no. 1307 Digitized edition from print [produced by Defence Research and Development Canada]. "Project 5CA11." Includes bibliographical references (page 38). "The Military Satellite Communications (MILSATCOM) group at Defence Research Establishment Ottawa (DREO) is performing in-house satellite communications uplink synchronization experiments. A critical part of the experiment is the block demodulation of the multi-channel frequency-hopped waveform. This report analyses the Fast Fourier Transform (FFT)-based demodulator implemented by Royal Military College (RMC) Kingston. This system is capable of demodulating a 32-channel, 8-ary frequency-shift-keying (FSK) waveform. The implementation consists of analog-to-digital (A/D) conversion, FFT computation, and high-speed input/output (I/O) interface processes using commercial off-the-shelf boards. A description of each of the boards is presented. The operational data flow of the system is examined. For the software implementation, a decimation-in-time approach is used in the digital signal processing (DSP) board to compute the discrete Fourier transform (DFT). A brief description of decimation-in-time algorithms is included. Key components of the assembly language program are outlined. A user’s guide detailing the setup requirements for proper operation of the system is included with those required for the DREO application. Steps required for modification to the software are briefly discussed"--Abstract, page iii. Includes abstracts in English and French. Radio frequency modulation Testing. Demodulation (Electronics) Modulation de fréquence Tests. Démodulation (Électronique) Defence Research Establishment Ottawa, issuing body. DREO report ; no. 1307. (CaOODSP)9.941661 PDF 2.82 MB https://publications.gc.ca/collections/collection_2025/rddc-drdc/DR52-17-80-1996-eng.pdf Project 5CA11