Methods and apparatus for power efficient iterative equalization

摘要

Systems and methods for power efficient iterative equalization on a channel are provided. An iterative decoder decodes received data from a channel detector using a decoding process. The decoder computes a decision metric based on the decoded data and adjusts the number of iterations of the decoding process based on the decision metric. The adjustment occurs prior to a reliability criterion for the decoded data being satisfied. The decoder may pass control back to the channel detector if the adjusted number of iterations has occurred or if the reliability criterion is satisfied. Adjusting the number of iterations of the decoding process may include increasing the number of iterations from a predetermined number of iterations. The decision metric may be based on syndrome weight or hard decisions. The decision metric may be chosen to reduce average power consumption of the detector, the decoder, or circuitry including the detector and the decoder.

主权项

1. A method of iterative equalization on a channel, comprising:
receiving data from a channel detector; decoding the received data with an iterative decoder using an iterative decoding process, wherein the decoding with the decoder is associated with a number of iterations of the decoding process, wherein at least a subset of the iterations each corresponds to an instance of the iterative decoder receiving the data from the channel detector; computing a decision metric based on the decoded data; and adjusting the number of iterations of the decoding process at the decoder based on the decision metric, wherein the adjustment occurs prior to a reliability criterion for the decoded data being satisfied.