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Welcome to the Center for Wireless Communications at the University of California, San Diego. CWC was established in 1995 and rapidly became a leader in wireless communications research. With its preeminent faculty and high caliber graduate students, CWC partners with companies to address the emerging needs of the wireless communications industry. CWC faculty and students engage in a broad range of research areas ranging from wireless applications, to networking, digital communication systems and high-speed integrated circuits.


Secret Communications in the Pysical Layer --- Impact of Training and Limited Channel State Information

Friday, October 31, 2014

Y.-W. Peter Hong

Host: Prof. Bhaskar Rao

Due to the broadcast nature of the wireless medium, secrecy considerations have become increasingly important in the design of wireless communication systems. In addition to conventional cryptography-based approaches, information-theoretic studies on physical layer secrecy have demonstrated the possibility of achieving confidentiality solely through coding and signal processing techniques. However, many of these studies rely on perfect knowledge of the channel state information (CSI) at the transmitter and/or the receiver, which is not attainable in practice. In this talk, I will describe our recent studies on the impact of training and limited channel state information (CSI) on the achievable secrecy rate. First, I will talk about the impact of quantized channel feedback on the achievable secrecy rate. By considering the artificial noise assisted beamforming system, I will discuss the secrecy rate loss caused by quantized channel direction information and show the scaling of the numbe [More...]

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