Method for symbol-spaced estimation and/or tracking of a fractionally-spaced fading radio channel
AssigneeEricsson Inc.
InventorKambiz C. Zangi
Life of this patent
Estimating the term…
Abstract
A method of estimating and/or tracking time varying radio channels comprises the step of receiving signals transmitted over the channels and converting the signals to digital samples for processing. Positions of fading rays of the channel medium are determined. Impulse response of a channel medium are estimated for each of the estimated positions. Estimates of the time varying radio channels are then calculated using the digital samples and the estimated impulse responses.
Claims8
A method of estimating symbol spaced time varying radio channels on a channel medium, comprising:
- receiving signals transmitted over the channel medium and converting the signals to digital samples for processing;
- determining positions of rays of the channel medium, wherein the rays of the channel medium are spaced closer than a transmit symbol period;
- recursively estimating jointly values of all rays of the channel medium using the digital samples;
- and
- calculating radio channel estimates of the symbol spaced time varying radio channels using transmit and receive filter responses and the determined position and the estimated values of the rays of the channel medium.
A channel estimator adapted to estimate symbol spaced time varying radio channels on a channel medium, comprising:
- means for receiving signals transmitted over the channel medium and converting the signals to digital samples for processing;
- means for determining positions of rays of the channel medium, wherein the rays of the channel medium are spaced closer than a transmit symbol period;
- means for recursively estimating jointly values of all rays of the channel medium using the digital samples;
- and
- means for calculating radio channel estimates of the symbol spaced time varying radio channels using transmit and receive filter responses and the determined position and the estimated values of the rays of the channel medium.
Dependencies are inferred from the claim text.