| 摘要 |
PROBLEM TO BE SOLVED: To attenuate a crosstalk portion of horizontal polarization and vertical polarization for a transmission system with a digital modulation section and a digital demodulation section. SOLUTION: The MPEG TS with different information for the vertical polarization and horizontal polarization is entered, and Null insertion processing is provided for each system of the horizontal polarization and vertical polarization to equalize the TS rate, and a clock and a preamble period timing pulse are made common and are temporally synchronized. A reference signal is transmitted in the form wherein the horizontal polarization is only present for the first half of a preamble period, while the vertical polarization is only present for the latter half. The equalization processing of reception is performed in the first half for the horizontal polarization, while in the latter half for the vertical polarization. A crosstalk portion from the horizontal polarization to the vertical polarization is detected in the first half, while a crosstalk portion from the vertical polarization to the horizontal polarization is detected in the latter half. After calculation of a crosstalk portion from the decoding result and subtraction of a crosstalk portion from a peer's pre-decoding signal, demodulation and error correction are performed for decoding to output the TS. COPYRIGHT: (C)2011,JPO&INPIT
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