Timing recovery with adaptive channel response estimation

A device for signal processing, said device comprising:

• an equalizer configured to generate an equalized signal responsive to a digital input signal;
• a channel estimator coupled to said equalizer and configured to apply an estimated channel response to said equalized signal to generated and estimated signal;
• an adder configured to generate an error signal based on a difference between said estimated signal and said digital input signal;
• and
• adaptation logic coupled to said channel estimator and configured to:
• dynamically adapt said estimated channel response based on said error signal;
• and
• suspend adapting said estimated channel response responsive to a determination that a Signal-to-Noise Ratio (SNR) of said equalized signal is greater than a predetermined value.

A receiver comprising:

• an Analog-to-Digital Converter (ADC) configured to generate a digital input signal based on a received analog signal that is transmitted via a communication channel and, further, based on a recovered clock signal;
• a timing recovery loop coupled to said ADC and configured to generate said recovered clock signal, wherein said timing recovery loop comprises:
• an equalizer coupled to said ADC and configured to generate an equalized signal responsive to said digital input signal;
• a channel estimation filter coupled to said equalizer and configured to apply an estimated channel response to said equalized signal to generate an estimated signal;
• an adder configured to generate an error signal based on a difference between said estimated signal and said digital input signal;
• and
• adaptation logic coupled to said channel response filter and configured to dynamically adapt said estimated channel response based on said error signal, wherein said channel estimation filter is configured to generate said estimated signal without correcting a clock delay associated with said digital input signal, wherein said adaptation logic is further configured to suspend adapting said estimated channel response responsive to a determination that a Signal-to-Noise Ratio (SNR) of said equalized signal is greater than a predetermined value.