Priori information aided compressive sensing for time domain synchronous OFDM

Time domain synchronous OFDM outperforms cyclic prefix OFDM in spectral efficiency and fast synchronisation, but suffers from the difficulty of supporting 256QAM and the performance loss over doubly selective fading channels due to severe inter-block-interference (IBI). In this reported work, the groundbreaking theory of compressive sensing is explored to solve those open problems, whereby the IBI-free region of small size within the received training sequence is used to recover the high-dimensional channel without any IBI cancellation, and partial priori information of the channel is further exploited to reduce the complexity.