Jun Naganawa, Takaya Yamazato, Masaaki Katayama. Cognitive radio with relay of a primary signal and piggyback modulation. In Proceedings of the IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2009, 13-16 September 2009, Tokyo, Japan. pages 147-151, IEEE, 2009. [doi]
Abstract is missing.