| 摘要 |
There are provided quadrant deciding section (101) that decides the quadrant to which a received signal belongs based on a received baseband signal; a rotation projector (102) that rotates the received signal based on a predetermined rule, and projects the rotated signal to a straight line that intersects orthogonally at the origin with a straight line that bisects the decided quadrant; an integrator (103) that integrates the signal after the projection; a one-bit quantizer (104) that quantizes the integration result by deciding the sign of the integration result; a delay circuit (105) that delays the quantized signal by a predetermined time; an adder (1) that adds the decision result and the quantized signal modulo the phase 2pi; and a low-pass filter (2) that sequentially latches phase values after the addition with internal shift registers, converts the phase value to a prescribed specific value when the phase values that cross over 2pi exist in the whole data within the registers, averages the phase values.
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