Channel estimator adopting masking
AssigneeLG Electronics Inc.
InventorsJae Hyoung Kim, Sung Ryong Hong
Life of this patent
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Abstract
Disclosed is a channel estimator adopting masking. In a channel estimator using a CIR (channel impulse response) estimating value, the present invention includes a CIR masking unit removing a noise included in the CIR estimating value. Accordingly, the present invention is capable of filtering noises resulting from finiteness of the PN sequence used in finding the cross correlator, thereby enabling to enhance accuracy for the CIR estimating value. And, the enhanced accuracy for the CIR estimating value enables to improve tracking performance to the time variable channel of the frequency domain equalizer using the channel estimator.
Claims15
In a channel estimator using a CIR (channel impulse response) estimating value, a channel estimator adopting masking, comprising a CIR masking unit removing a noise included in the CIR estimating value.
A channel estimator adopting masking, comprising:
- a trained sequence generator outputting a trained sequence;
- a cross correlator finding a cross correlating value between a signal transmitted from an outside and the trained sequence;
- a max value searcher detecting a maximum value of the cross correlating value by predetermined field unit;
- a cross correlating vector generator outputting a cross correlating vector amounting to a CIR (channel impulse response) estimating range based on the maximum value of the cross correlating value;
- a ROM previously storing to output an inverse matrix of an auto correlating value of the trained sequence;
- an operator finding a CIR estimating value using the inverse matrix of the auto correlating value and the cross correlating vector;
- and
- a CIR masking unit removing a noise included in the CIR estimating value.
In an equalizer performing channel estimating through a CIR (channel impulse response) estimating value, a channel estimator adopting masking, comprising a CIR masking unit removing a noise included in the CIR estimating value.
Dependencies are inferred from the claim text.