Efficient tracking of decision-feedback equaliser coefficients

摘要

Efficient methods and apparatus for tracking decision-feedback equaliser (DFE) coefficients are described. In an embodiment, updated coefficients for a feed-forward equaliser (FFE) are generated using conventional methods and then these are used, along with an averaged updated value of channel impulse response (CIR) estimate to generate updated DFE coefficients. In an embodiment, the updated DFE coefficients are generated by multiplying the updated CIR estimate (in the frequency domain) and the updated FFE coefficients (also in the frequency domain). The resultant updated DFE coefficients in the frequency domain may then be converted into the time domain before outputting to the DFE.

主权项

1. A method of generating updated decision-feedback equaliser (DFE) coefficients for use in an equaliser in a wireless receiver, the equaliser comprising a feed-forward equaliser (FFE) and a DFE and the method comprising:
updating a channel impulse response estimate; updating FFE coefficients; generating updated DFE coefficients based on the updated channel impulse response estimate and the updated FFE coefficients; extracting a real part of the updated DFE coefficients; and converting the real part of the updated DFE coefficients to the time domain.