Apparatus and method for channel estimation using a signal correlation and a signal energy to approximate a channel parameter
AssigneeMediatek Incorporation
InventorsMing-Luen Liou, Chiao-Chih Chang
Life of this patent
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Abstract
In a channel estimation method, an input signal is received. The input signal is then sliced to obtain a sliced signal. The multiplication of the input signal and the ith delayed sliced signal are accumulated to obtain a cross-correlation value. The energy of the sliced signal is measured. The ith channel parameter of a channel response is estimated according to the division of the cross-correlation value by the energy of the sliced signal. A channel estimator performing channel estimation is also provided.
Claims5
A channel estimation method, comprising:
- receiving an input signal;
- slicing the input signal to obtain a sliced signal;
- accumulating a multiplication of the input signal and an ith delayed sliced signal to obtain a first value, where i is an integer;
- measuring an energy of the sliced signal and outputting a second value;
- and
- approximating an ith channel parameter of a channel response according to the first and second values.
A channel estimator for estimating a transmission channel response represented by a plurality of channel parameters, comprising:
- a slicer, receiving an input signal and slicing the input signal to obtain a sliced signal;
- a delay line, comprising a plurality of delay units, for receiving the sliced signal and generating a plurality of delayed signals;
- an energy meter for measuring an energy of the sliced signal;
- and
- a plurality of estimating units, each coupling to a respective delay unit, for estimating a corresponding channel parameter according to the input signal, the output signal of the respective delay unit, and the measured energy of the sliced signal.
Dependencies are inferred from the claim text.