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A feedforward tracking filter. Part 2: Noise performance and applications

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3 Author(s)
Lee, K.K. ; Concordia University, Dept of Electrical Engineering, Montreal, Canada ; Le-Ngoc, T. ; Bhargava, V.K.

The performance of a Feedforward Tracking Filter (FTF) in the presence of white additive Gaussian noise is analysed. By studying the spectral properties and input-output signal-to-noise ratio (SNR), it is observed that the output of the nonlinear bandpass model of the FTF contains a mixture of signal and noise cross-modulation products. Due to the nonlinear effect, the FTF achieves tracking abilities at the expense of SNR. In addition, the probability density function of the phase error is evaluated. Finally, experimental results to verify the analysis and an application of the FTF to a fast carrier recovery system are presented.

Published in:

Electronic and Radio Engineers, Journal of the Institution of  (Volume:57 ,  Issue: 6 )