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This paper studies the degraded broadcast channel with rate-limited feedback. The transmitter aims to convey a common message to receiver 1 and 2 in addition to a confidential message intended only for receiver 1. The feedback symbol, independent of the channel outputs, is introduced to serve as a secret key between the transmitter and receiver 1. The capacity-equivocation region of this channel model...
The problem that we consider is the secrecy communication in bilateral transmitting scenario. The model is connected via wireless signal between two points: the transmitter and the receiver. We assume that the transmitter has a single transmit antenna while the receiver has two (one transmit, one receive). In recent papers, it is shown that artificial noise could be used to increase the secrecy capacity...
In wireless communication, the transmitter (Alice) can send artificial noise (AN) to interfere with the eavesdropper (Eve). This letter considers the AN MIMO scenario, i.e., both Alice and the legitimate receiver (Bob) are equipped with multiple antennas. A closed-form expression for the lower bound of secrecy capacity is obtained. It is proved that water-filling is the optimal power allocation scheme...
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