Title :
Characterization of multipath distortion of FSK signals
Author :
Chung, Wonzoo ; Johnson, C.R., Jr. ; Ready, M.J.
Author_Institution :
Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA
Abstract :
We characterize the nonlinear distortion of frequency-shift keying (FSK) signals due to a multipath channel as a linear time varying channel. The dynamic range of time variation of this time-varying channel model is small for a mild multipath channel and large for a severe multipath channel. This characterization justifies the use of a decision directed adaptive linear equalizer for FSK signals after frequency demodulation in order to mitigate the distortion due to a multipath channel.
Keywords :
adaptive equalisers; continuous phase modulation; demodulation; frequency shift keying; multipath channels; nonlinear distortion; time-varying channels; CPFSK; FSK signals; blind equalization; continuous phase FSK; decision directed adaptive linear equalizer; dynamic range; frequency demodulation; frequency-shift keying; linear time varying channel; multipath channel; multipath distortion; nonlinear distortion; time-varying channel model; Adaptive filters; Digital signal processing; Dynamic range; Filtering; Frequency shift keying; Multipath channels; Nonlinear distortion; Nonlinear filters; Quadrature amplitude modulation; Time-varying channels;
Journal_Title :
Signal Processing Letters, IEEE
