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Time for convergence of an equalizer is not a function of _______

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Time for convergence of an equalizer is not a function of _______

(a) Equalizer algorithm

(b) Equalizer structure

(c) Time rate of change of multipath radio channel

(d) Transmitter characteristics

I have been asked this question during a job interview.

This intriguing question originated from Fundamentals of Equalization topic in section Equalization, Diversity and Channel Coding of Wireless/Mobile

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The correct option is (d) Transmitter characteristics

The explanation is: The timespan over which an equalizer converges is a function of the equalizer algorithm, the equalizer structure and the time rate of change of the multipath radio channel. Equalizers require proper retraining in order to maintain effective ISI cancellation.

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