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
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| 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. |
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| Publication type | Monograph - View Master Record |
| Language | [English] |
| Format | Digital text |
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| Description | 1 online resource (iii, 46 pages) : illustrations. |
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