Cooperative Communications for Wireless Information Assurance: Secure Cooperative Communications and Testbed Development

This report summaries our progress and accomplishments for the project Secure Cooperative Communications and Testbed Development. We have worked on physical-layer security and cooperative communications, and have been developing a wireless cooperative transmission testbed to demonstrate our theoretic results. In this project, we have obtained some major achievements. We have developed an innovative secure transmission scheme, have studied the limit of cooperative transmissions, and have invented a new cooperative OFDM transmission scheme to combat transmission asynchronism. They are helpful to the development of future physical-layer wireless information assurance techniques as well as the cooperative communication techniques. We have successfully implemented the wireless cooperative transmission testbed, implemented array transmissions, and estimated channels which partially verified the validness of our theories.