| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem that, in a conventional orthogonality error correction circuit, circuit configuration is complicated since it is necessary to determine a quadrant of a symbol point and to calculate power separately for an even-numbered quadrant and an odd-numbered quadrant.SOLUTION: A receiver includes: a quadrature detection section 2 for detecting a quadrature modulation wave r0 and outputting an in-phase component signal ri1 and a quadrature component signal rq1 which are orthogonal to each other; and an orthogonality error correction circuit including a phase rotation part 4 which rotates phases of the in-phase component signal ri1 and the quadrature component signal rq1 just at a correction rotation angle that is an angle having a remainder of 45 degrees with 90 degrees as a divisor, respectively, and an amplitude correction part 5 which performs correction in such a manner that average amplitudes or average power of an in-phase component signal ri2 and a quadrature component signal rq2 outputted from the phase rotation part 4 within a predetermined time length can become equal.</p> |
