Optimal design of prefilters for binary FSK discriminators

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Optimal design of prefilters for binary FSK discriminators

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Prefilters are derived for delay-line discriminators for FSK systems which allow these simple demodulators to give optimum, or matched filter performance. Filters are presented which allow the demodulator to give optimum performance even when the tone spacing is a multiple of the minimum orthogonal spacing. Finally, an architecture is suggested that incorporates a tapped-delay-line to synthesise these prefilters.

Inspec keywords: digital filters; demodulators; filtering and prediction theory; delay lines; frequency shift keying; discriminators

Other keywords: demodulators; matched filter performance; optimal design; prefilters; binary FSK discriminators; tapped-delay-line; delay-line discriminators; optimum performance

Subjects: Modulators, demodulators, discriminators and mixers; Digital filters; Signal processing and detection

References

    1. 1)
      • S. Benedetto , E. Biglieri , V. Castellani . (1987) , Digital transmission theory.
    2. 2)
      • R.R. Anderson , W.R. Bennett , J.R. Davey , J. Salz . Differential detection of binary FM. Bell Syst. Tech. J. , 111 - 159
    3. 3)
      • S. Stein . Unified analysis of certain coherent and noncoherent binary communications systems. IEEE Trans. , 43 - 51
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