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US 7,924,955 B2Granted
Method and article of estimating of phase and gain mismatch and corresponding method and device for receiving a digital base band signal
AssigneeDibcom
InventorJean Schmitt
Life of this patent
Estimating the term…
Abstract
The method is for estimating a phase and gain mismatch of a base band digital signal. It comprises: determining (10) weight coefficients depending upon the likelihood of the frequency values of a segment of said base band digital signal; and determining (26) the phase and gain mismatch for the segment using the weight coefficients.
Claims17
A method of estimating a phase and gain mismatch between the real part and the imaginary part of a segment of a base band digital signal, the method comprising:
- segmenting the segment of said base band digital signal into subbands in frequency, the method being characterized by:
- for each subband, estimating a phase and gain mismatch between the real and imaginary parts of the subband;
- for each subband, estimating a likelihood value representative of a likelihood of frequency values of the subband using the estimated phase and gain mismatch values of the subbands;
- and
- determining a phase and gain mismatch for the entire segment by using said estimated phase and gain mismatches of the subbands and the corresponding likelihood values.
2 more elements
A digital signal receiver comprising:
- a transposing unit to transpose an analogue signal into a base band digital signal;
- a phase and gain mismatch determination unit;
- and
- a base band digital signal correction unit,
- wherein the phase and gain mismatch determination unit comprises:
- a segmenting component to segment a segment of the base band digital signal into subbands in frequency and characterized by:
- a phase and gain mismatch estimation component to estimate for each subband a phase and gain mismatch between the real and imaginary parts of the subband,
- an estimation component to estimate for each subband a likelihood value representative of a likelihood of frequency values of the subband using the estimated phase and gain mismatch values of the subbands, and
- a phase and gain mismatch determining element to determine a phase and gain mismatch for the entire segment by using said estimated phase and gain mismatches of the subbands, and the corresponding likelihood values.
6 more elements
Dependencies are inferred from the claim text.