ORTHOGONAL MODULATOR, AND VECTOR CORRECTION METHOD IN THE SAME

PROBLEM TO BE SOLVED: To provide an orthogonal modulator that can reduce a phase error after manufacturer even if variations occur in the manufacturer, and hence can reduce manufacturing costs, and to provide a vector correction method in the orthogonal modulator. SOLUTION: In the vector correction method of an orthogonal modulation vector, LOIand LOQsignals, which have phases that are different by 90 degrees each other, are used, and an I channel baseband transmission signal ICHand a Q channel baseband signal QCHare orthogonally modulated for generation. The method includes a step for generating an LOQ+Isignal, where the vector of the LOIsignal is added to that of the LOQsignal, and an LOQ-Isignal, where the vector of the LOIsignal is subtracted from that of the LOQsignal; and a step for controlling amplitude in at least one of the I channel baseband transmission signal ICHof the transmission signal, and Q channel baseband signal QCHfor vector correction. COPYRIGHT: (C)2007,JPO&INPIT