Wireless device and wireless transmission method
地域：
Kanasaki-shi, Kanagawa
摘要
A wireless device includes: a plurality of antennas; a first correlation series generator configured to generate a first correlation series based on transmission data; a second correlation series generator configured to generate a second correlation series based on the first correlation series; a first modulator configured to modulate the transmission data to generate a first modulated signal; a second modulator configured to modulate the first correlation series to generate a second modulated signal; a third modulator configured to modulate the second correlation series to generate a third modulated signal; a signal combiner configured to combine the first to third modulated signals to generate first to third transmission signals; and a transmitter configured to output the first to third transmission signals respectively via first to third antennas among the plurality of antennas.
說(shuō)明書(shū)
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In a secure communication using artificial nose, the artificial noise in a received signal is canceled out, as described above, at a destination node, and the artificial noise remains in a received signal at another terminal device. Hence, it is difficult for the other terminal device to recover data from the received signal.
However, when the number of reception antennas of an interception node is larger than the number of transmission antennas of the source node, the interception node could separate an artificial noise series from a received signal without recognizing a signal combining scheme based on precoding performed by the source node (e.g., non-patent document 2). In this case, the interception node could recover data.
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