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Two-hop security communication with an eavesdropper in wireless environment is a hot research direction. The basic idea is that the destination, simultaneously with the source, sends a jamming signal to interfere the eavesdropper near to or co-located with the relay. Similar as physical layer network coding, the friendly jamming signal will prevent the eavesdropper from detecting the useful information...
MIMO techniques can significantly improve the diversity gain and spectrum utilization. Physical-layer Network Coding (PNC) is also a new technique to increase the spectrum utilization of wireless networks. The novel VBLAST PNC scheme combined these two techniques to improve the performance further. In this paper, we analyze the Bit Error Rate (BER) performance of the new scheme based on QPSK modulation...
When data are transmitted in a wireless network, they reach the target receiver as well as other receivers in the neighborhood. Rather than a blessing, this attribute is treated as an interference-inducing nuisance in most wireless networks today (e.g., IEEE 802.11). Physical-layer network coding (PNC), however, has been proposed to take advantage of this attribute. Unlike "conventional"...
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