A SAW-based demodulator for multiple-user dehopped M-ary FSK signals - implementation and measurements / by E.B. Felstead, J.L. Pearce, and D.L. Selin.: Co24-3/7-1392-1985E-PDF
"A demodulator has been built and tested that is capable of performing the functions of an onboard-the-satellite processor for receiving M-ary noncoherent FSK signals with multiple users being separated by FDMA. It is based on spectral analysis of the received signal by a chirp transformer implemented with surface acoustic-wave devices. Demodulation of M=4-, 8-, and 16-ary FSK signals of 25 µs symbol duration was demonstrated with capability of handling up to 40/M users. The implementation loss was only 0.5 dB. Measurement of bit error rate performance in the presence of system noise, frequency errors, and partial-band-noise and multiple-tone jamming were made and found to agree well with theory. The effects were examined of three different time windows: rectangular, Kaiser Bessel α = 1.6, and one intermediate between these two. The intermediate window is promising because of low window loss combined with good adjacent channel interference tolerance"--Abstract, page 1.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.895061&sl=0
| Department/Agency | Communications Research Centre (Canada), issuing body. |
|---|---|
| Title | A SAW-based demodulator for multiple-user dehopped M-ary FSK signals - implementation and measurements / by E.B. Felstead, J.L. Pearce, and D.L. Selin. |
| Series title | CRC report ; no. 1392 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | "Space Technology and Applications Branch." "This document was prepared for and is the property of the Department of National Defence, Research and Development Branch under Project No. 32A58." Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. Includes bibliographical references (page 34). Issued also in print format. |
| Publishing information | Ottawa : Communications Research Centre, June 1985. |
| Author / Contributor | Felstead, E. B. (E. Barry), 1940- author. |
| Description | 1 online resource (iii, 46 pages) : illustrations. |
| Catalogue number |
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| Subject terms | Radio detectors. Acoustic surface wave devices. Artificial satellites in telecommunication. Démodulateurs. Dispositifs à ondes acoustiques de surface. Satellites artificiels dans les télécommunications. |
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