Adaptive frequency-domain equalization for wireless receivers

摘要

According to various embodiments, devices and methods disclosed herein include performing, using a processor, a linear operation on a first plurality of channel frequency responses and a plurality of corresponding predictor coefficients to estimate a new channel frequency response. Each of the plurality of corresponding predictor coefficients may be updated based on an error value and a second plurality of channel frequency responses to obtain an updated predictor coefficient. The error value may be computed based on an estimated current channel frequency response and a predicted current channel frequency response. The new channel frequency response may be used to equalize a received modulated signal including a single-carrier modulated signal, e.g., a signal modulated using a vestigial sideband modulation scheme, or a quadrature amplitude modulation scheme.

主权项

1. A method comprising:
storing, in a memory, a first plurality of channel frequency responses and a plurality of corresponding predictor coefficients, wherein at least one of the plurality of corresponding predictor coefficients is a direct function of one or more particular frequencies; updating, using a processor, at least one of the plurality of corresponding predictor coefficients based on an error value to obtain an updated predictor coefficient for an updated plurality of corresponding predictor coefficients, wherein the error value is computed based on a difference value between an estimated current channel frequency response for a first frequency and a predicted current channel frequency response for the first frequency, wherein the predicted current channel frequency response is computed based on a weighted sum of a plurality of estimated past channel frequency responses for the first frequency; and computing, using the processor, a new channel frequency response comprising performing a linear operation on the first plurality of channel frequency responses and the updated plurality of corresponding predictor coefficients.