Xianbin Wang Yiyan Wu Hsiao-Chun Wu A New Adaptive OFDM System with Precoded Cyclic Prefix for Cognitive Radio. 3642-3646 2008 ICC http://dx.doi.org/10.1109/ICC.2008.685 conf/icc/2008 db/conf/icc/icc2008.html#WangWW08