Thursday 28th of March 2024
 

Frequency Domain Soft-Decision Feedback Equalization for SC-FDMA with Insufficient Cyclic Prefix


Qiucai Wang, Chaowei Yuan, and Yingxue Li

Single-carrier frequency-division multiple access (SC-FDMA) system suffers performance degradation when the length of the cyclic prefix (CP) is less than the channel delay spread. In this paper, based on MMSE criterion, we proposed an efficient frequency domain soft-decision feedback equalization (FD-SDFE) scheme for SC-FDMA system. The proposed scheme employs residual inter-symbols cancellation (RISIC) algorithm, combining a prior information to reduce inter-block interference (IBI) and inter-carrier interference (ICI) component caused by the absence of CP in multipath fading channel. In addition, an FD-SDFE is derived to further mitigate the residual interference. Simulation results show that the proposed scheme has a significant performance improvement.

Keywords: SC-FDMA, Frequency domain (FD), soft-decision feedback equalization (SDFE), cyclic prefix (CP)

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ABOUT THE AUTHORS

Qiucai Wang
Qiucai Wang received the M.S. degree in detection technology and automatic equipment from Xi\'an Jiaotong University, Xi\'an, China, in 2002. He is currently an Associate Professor with the school of electronic and control engineering, CHANG\'AN University, Xi\'an, China, and pursuing the Ph.D. degree at the department of information and communication engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing, China. His research interests include channel equalization and space-time wireless communications.

Chaowei Yuan
Chaowei Yuan received the Ph.D. degree in Mathematics from Xi\'an Jiaotong University in 1994. He is currently a Professor at the department of information and communication engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing, China. His current research interests include advanced signal processing in wireless communications, coded modulation and cooperative communications.


Jinbo Zhang received the M.S. degree in communication and information system from Yanshan University, Qinhuangdao, China, in 2010. He is currently pursuing the Ph.D. degree at the department of information and communication engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing, China. His research interests include precoding and MIMO.

Yingxue Li
Yingxue Li received the M.S. degree in Computer Software and Theory from Zhejiang Normal University, Jinhua, China, in 2009. He is currently working toward the Ph.D. degree at the Institute of wireless communication of Beijing University of Posts and Telecommunications (BUPT), Beijing, China. His research interests include cognitive radio network and signal detection.


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