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Novel 2–4 PSK differential demodulator for satellite broadcast receivers using SAW technology

Novel 2–4 PSK differential demodulator for satellite broadcast receivers using SAW technology

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© The Institution of Electrical Engineers
Published

A novel 2–4 PSK differential demodulator based on a three-port SAW delay line is described. A method for optimising the performance by tuning the carrier frequency using the DC output of the demodulator is outlined. The optimum performance of the demodulator was within 0.4 dB of theory for a bit error ratio of 10−3.

Inspec keywords: surface acoustic wave devices; demodulators; ultrasonic delay lines; satellite ground stations; phase shift keying

Other keywords: ultrasonic devices; C-MAC system; 2-4 PSK differential demodulator; three-port SAW delay line; satellite ground stations; surface acoustic wave device; satellite broadcast receivers; DBS; DC output; phase shift keying

Subjects: Modulation and coding methods; Acoustic wave devices; Modulators, demodulators, discriminators and mixers; Satellite communication systems

References

    1. 1)
      • `Television standards for 625-line 12 GHz satellite broadcasting', AA/10-11, Draft report, September 1983, CCIR, also European Broadcasting Union report SPB 284.
    2. 2)
      • M.F. Lewis . Surface-acoustic wave devices. GEC J. Sci. & Technol.
    3. 3)
      • G.W. Farnell . SAW propagation in piezoelectric solids. Wave Electron. , 1 - 24
    4. 4)
      • Harris, R.A., Erup, , Kristeansen, P.: `A transmission analysis for the use of 2–4 PSK modulation in satellite broadcasting', CCT/27281/RAH/CMN = (1), European Space Agency report, 1983, p. A2.2.
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