| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transmission apparatus which modulates a digital signal, using a predetermined modulation system for transmitting the digital signal toward a receiving apparatus via a predetermined transmission line. <P>SOLUTION: This transmission apparatus includes: a pseudo-atellite relay 6 having characteristics obtained by approximating characteristics of a relay on a transmission line; a vector arithmetic operation section 30 which obtains, as an error vector, deviation of a signal point, after passing through the satellite relay, from an ideal IQ signal point after mapping from a signal point of a digital signal transmitted via the pseudo satellite relay 6, and converts the signal point, after mapping of this signal point into a signal point corrected with the error vector; a delay section 7 for performing timing adjustment for correcting the signal point after mapping of this signal point with the error vector; and a quadrature modulation section 14 for performing quadrature modulation at the signal point corrected with the error vector. <P>COPYRIGHT: (C)2010,JPO&INPIT |
