Symbol Cyclic Shift Equalization PAM-OFDM-A Low Complexity CP-Free OFDM Scheme

Xi Qing Liu, Hsiao Hwa Chen, Bo Yu Lyu, Wei Xiao Meng

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)


In traditional orthogonal frequency division multiplexing (OFDM) systems, a cyclic prefix (CP) must be used in every block for intersymbol interference (ISI) suppression in time-dispersive channels at a price of severely impaired spectrum efficiency. To deal with this issue, the symbol cyclic shift equalization (SCSE) algorithm was proposed to implement a CP-free OFDM system. In this paper, we aim to further reduce the computational complexity of the SCSE algorithm. In particular, a pulse amplitude modulation (PAM) is used at a transmitter to construct conjugate symmetric OFDM blocks, while only partial samples in an OFDM block are involved in the SCSE algorithm at the receiver side, leading to a significantly reduced implementation complexity if compared to an SCSE quadratic-amplitude modulation(QAM)/phase-shift keying (PSK)-OFDM system, where all samples in an OFDM block must be involved in the detection process. The performance of the proposed SCSE PAM-OFDM scheme is analyzed and compared to traditional OFDM systems. The results obtained from this paper verify the effectiveness of the proposed scheme.

頁(從 - 到)5933-5946
期刊IEEE Transactions on Vehicular Technology
出版狀態Published - 2017 7月

All Science Journal Classification (ASJC) codes

  • 汽車工程
  • 航空工程
  • 電氣與電子工程
  • 應用數學


深入研究「Symbol Cyclic Shift Equalization PAM-OFDM-A Low Complexity CP-Free OFDM Scheme」主題。共同形成了獨特的指紋。