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This paper proposes a novel usage of zero-forcing beamforming (ZFB) for secure transmission in multiple-input single-output (MISO) wiretap channels. When using ZFB for secure transmission, the difficulty lies in the legitimate transmitter (Alice) hardly knowing the channel to eavesdroppers (Eves). The knowledge of the channel to Eves is essential when Alice builds a ZFB precoder that could eliminate...
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