Security enhancement for MIMO based wireless network using codebook and diversity multiplexing

In this paper we study about the secure communication among wireless shared medium using secrecy performance of a codebook based transmission beamforming with limited feedback. And avoid attacker from stealing the confidential data. In the feedback method transmitter is using a predefined codebook known to transmitter and receiver knows it after producing index value as feedback during beamforming. The secrecy outage probability is analyzed to find whether it is stealed. The bound values are provided on the secrecy outage probability. The fading in multiple antenna (MIMO) wire-tap channel is investigated under short term power constraints. The secret diversity multiplexing tradeoff (DMT) is found for no transmitter side channel state information (CSI) and for full CSI. When there is no CSI at the transmitter, while using Gaussian codebooks, it seems that both transmitter and receiver antennas are stealed, and the secret DMT depends on the other degrees of freedom. When CSI is available at the transmitter (CSIT), then transmitter antenna is only stealed.