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Timing Jitter Effects on Digital Subscriber Loop Echo Cancellers: Part I--Analysis of the Effect

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1 Author(s)
Falconer, D.D. ; Carleton Univ., Canada

We analyze the effect of Subscriber-end timing recovery Circuit jitter on the performance of two types of adaptive echo cancellers that can be used for full-duplex digital transmission on two-wire subscriber loops. Under severe echo-to-far-end signal ratios, echo canceller performance is found to be quite sensitive to high-frequency jitter components. Satisfactory performance with respect to jitter requires that a narrow-band phase-locked loop, rather than a single-tuned high- Q filter, be employed for timing recovery.

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Communications, IEEE Transactions on  (Volume:33 ,  Issue: 8 )