Control signal detection method with calibration error and subscriber unit therewith
First Claim
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1. A control signal detection method for detecting the control signal in received continuous (4×
- n) data, signal points of said control signal being rotated by 90°
in the same direction on the same circle on a complex plane, comprising the steps of;
obtaining a mean value of said received continuous (4×
n) data existing on said complex plane, where n is a natural number, for obtaining a calibration error value for data demodulation;
error-calibrating said received continuous data on the basis of the obtained calibration error value for compensating an error of said received continuous data; and
obtaining a correlation value on the basis of the error-compensation received continuous data, thereby detecting said control signal.
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Abstract
In a control signal detection method, a calibration error value is obtained by obtaining the mean value of the received continuous (4×n) data, and the calibration error is compensated with respect to the received data by subtracting the obtained calibration error value from the received data, and the correlation value is obtained on the basis of the corrected received data, so that the control signal is detected. Therefore, it is able to compensate the calibration error with ease and to detect the control signal efficiently, with a simple construction.
20 Citations
8 Claims
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1. A control signal detection method for detecting the control signal in received continuous (4×
- n) data, signal points of said control signal being rotated by 90°
in the same direction on the same circle on a complex plane, comprising the steps of;obtaining a mean value of said received continuous (4×
n) data existing on said complex plane, where n is a natural number, for obtaining a calibration error value for data demodulation;error-calibrating said received continuous data on the basis of the obtained calibration error value for compensating an error of said received continuous data; and obtaining a correlation value on the basis of the error-compensation received continuous data, thereby detecting said control signal. - View Dependent Claims (2, 3)
- n) data, signal points of said control signal being rotated by 90°
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4. A subscriber unit for receiving data transmitted from a base station and for detecting a control signal in received continuous (4×
- n) data, in which signal points in said control signal are rotated by 90°
in the same direction on the same circle on a complex plane, comprising;calibration error value operation means for obtaining a mean value of said received continuous (4×
n) data existing on said complex plane, where n is a natural number, for obtaining a calibration error value for data demodulation;error compensation means for error-calibrating with respect to said received continuous data on the basis of the calibration error value from said calibration error value operation means for compensating an error of said received continuous data; and control signal detection means for obtaining a correlation value on the basis of the error-calibrated received data, so that said control signal is detected. - View Dependent Claims (5, 6, 7, 8)
- n) data, in which signal points in said control signal are rotated by 90°
Specification