Characterization of multipath distortion of FSK signals

摘要

We characterize the nonlinear distortion of frequency-shift keyingn(FSK) signals due to a multipath channel as a linear time varyingnchannel. The dynamic range of time variation of this time-varyingnchannel model is small for a mild multipath channel and large for ansevere multipath channel. This characterization justifies the use of andecision directed adaptive linear equalizer for FSK signals afternfrequency demodulation in order to mitigate the distortion due to anmultipath channel