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Quasi-Optimal Demodulation of Pulse-Frequency Modulated Signals

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2 Author(s)
J. Moore ; Univ. of Newcastle, New South Wales, Australia ; R. Hawkes

Novel demodulator structures are derived for quasioptimal on-line demodulation of pulse-frequency modulated (PFM) signals in the presence of white Gaussian channel noise. The basic demodulator consists of a phase-locked loop with its integrators appropriately reset as each new pulse is received. This modulator may be augmented with additional integrators and gain elements to achieve quasi-optimal demodulation with delay. The quasi-optimal demodulation approaches optimal demodulation, in the minimum mean-square error sense, as the signal-to-noise ratio increases. The various quasi-optimal receivers are derived by application of the extended Kalman filter theory to a state-space signal model.

Published in:

IEEE Transactions on Communications  (Volume:22 ,  Issue: 6 )