00000nam 2200000zi 4500 9.894565 CaOODSP 20221107173756 m o d f cr bn||||||||| 201210s1976 onca ob f000 0 eng d CaOODSP eng rda CaOODSP Co24-3/7-1284-1976E-PDF Pearce, John L., 1944- author. Intermodulation analysis with Fourier-Bessel expansions / by J.L. Pearce. Ottawa : Communications Research Centre, 1976. 1 online resource (v, 67 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier CRC report ; no. 1284 TELS report ; no. 31 "Space Applications Branch." "Published March 1976." "This work was sponsored by the Department of National Defence, Research and Development Branch under Project No. 28-01-31." Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. Some pages rotated in this copy. Includes bibliographical references (pages 55-57). "In any frequency-division-multiple-access (FDMA) satellite communications system the control of intermodulation noise must be considered if all signals are amplified by a single nonlinear power amplifier in the satellite transponder. The subject of this report is the use of Fourier-Bessel series expansion models in the prediction of the intermodulation performance of both travelling-wave-tube (TWT) amplifiers and solid state class C, UHF amplifiers. Both theoretical and experimental results are described and compared. It is shown that in the case of the solid state amplifiers a dynamic characteristic measurement technique must be used before reliable predictions can be achieved. A simple intermodulation noise reduction scheme is described for use with high-power-efficiency-class-C solid state amplifiers. It is demonstrated that a signal-to-intermodulation noise power ratio improvement of 10 dB can be achieved with a minimal decrease in prime power efficiency"--Abstract, page 1. Issued also in print format. Artificial satellites in telecommunication. Radio frequency modulation. Fourier series. Bessel functions. Satellites artificiels dans les télécommunications. Modulation de fréquence. Séries de Fourier. Fonctions de Bessel. Communications Research Centre (Canada), issuing body. CRC report ; no. 1284. (CaOODSP)9.882492 PDF 2.29 MB https://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-3-7-1284-1976-eng.pdf