Abstract
The problem of automatic gain control (AGC) for DFE (decision feedback equalization) read channels is addressed. We analyze an existing AGC algorithm that uses slicer input for deriving the gain error signal and show that it suffers from ambiguity in the control direction of AGC loop due to the presence of feedback equalizer. This could result in slow convergence and possible instability problems. A new AGC scheme has been proposed to overcome this ambiguity and it uses the sign of the forward equalizer output instead of slicer input to control the AGC loop direction. Simulation results show good acquisition and tracking performances of the new scheme under noisy circumstances.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
