Multiple Access Channels with Generalized Feedback and Confidential Messages

Details Multiple Access Channels with Generalized Feedback and Confidential Messages Multiple Access Channels with Generalized Feedback and Confidential Messages

2007-06-26

arxiv.org/abs/0706.3753v1

Computer Science

Information Theory

To appear in the Proceedings of the 2007 IEEE Information Theory Workshop on Frontiers in Coding Theory, Lake Tahoe, CA, Septe

Scientific paper

This paper considers the problem of secret communication over a multiple access channel with generalized feedback. Two trusted users send independent confidential messages to an intended receiver, in the presence of a passive eavesdropper. In this setting, an active cooperation between two trusted users is enabled through using channel feedback in order to improve the communication efficiency. Based on rate-splitting and decode-and-forward strategies, achievable secrecy rate regions are derived for both discrete memoryless and Gaussian channels. Results show that channel feedback improves the achievable secrecy rates.

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