Solutions for the MIMO Gaussian Wiretap Channel with a Cooperative Jammer

Abstract

We study the Gaussian MIMO wiretap channel with a transmitter, a legitimate receiver, an eavesdropper and an external helper, each equipped with multiple antennas. The transmitter sends confidential messages to its intended receiver, while the helper transmits jamming signals independent of the source message to confuse the eavesdropper. The jamming signal is assumed to be treated as noise at both the intended receiver and the eavesdropper. We obtain a closed-form expression for the structure of the artificial noise covariance matrix that guarantees no decrease in the secrecy capacity of the wiretap channel. We also describe how to find specific realizations of this covariance matrix expression that provide good secrecy rate performance, even when there is no non-trivial null space between the helper and the intended receiver. Unlike prior work, our approach considers the general MIMO case, and is not restricted to SISO or MISO scenarios.

References in corpus (7)

• Secure Transmission with Multiple Antennas II: The MIMOME Wiretap Channel
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• Transmitter Optimization for Achieving Secrecy Capacity in Gaussian MIMO Wiretap Channels
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• Cooperative Jamming for Wireless Physical Layer Security
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• A Survey of Physical Layer Security Techniques for 5G Wireless Networks and Challenges Ahead
• Improving Wireless Physical Layer Security via Exploiting Co-Channel Interference
• Secrecy Analyses of a Full-Duplex MIMOME Network
• Uncrewed Vehicles in 6G Networks: A Unifying Treatment of Problems, Formulations, and Tools
• On the Secrecy Capacity of a MIMO Gaussian Wiretap Channel with a Cooperative Jammer
• Outage Constrained Robust Secure Transmission for MISO Wiretap Channels
• Bit Error Probability Instead of Secrecy Rate Criterion to Enhance Performance for Secure Wireless Communication Systems
• Linear Precoder Design for a MIMO Gaussian Wiretap Channel with Full-Duplex Source and Destination Nodes
• Secure Communication through Wireless-Powered Friendly Jamming: Jointly Online Optimization over Geography, Energy and Time
• MIMO Secret Communications Against an Active Eavesdropper
• Joint Design of Optimal Cooperative Jamming and Power Allocation for Linear Precoding
• Apply Artificial Noise To Secure Fading Relay Networks: A SER-Based Approach