| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for allowing modulation of signals by performing modulation to cosine carrier wave signals for the Hilbert transformation of common-mode data signals and quadrature phase data signals and performing modulation to sine carrier wave signals for the Hilbert transformation of the quadrature phase data signals and the common-mode data signals. SOLUTION: An SSB-QPSK transmitter 60 is provided with interpolation devices 62 and 64 for interpolating respective data brought by input signals X[n] and Y[n] by zero. Interpolated signals X[n] are separated into two parts, one part is delayed by a delay element 66 and the other part is Hilbert transformed in a Hilbert filter 68. The delayed version of X[n] from the delay element 66 is supplied to a signal coupler 70 and the Hilbert transformation of X[n] is supplied to another signal coupler 72. The delay of the delay element 66 is selected so as to match the delay by the Hilbert filter 68. |
