Performance of LDPC Coded OTFS Systems over High Mobility Channels

Author:ZHANG Chong, XING Wang, YUAN Jinhong, ZHOU Yiqing Click:
The Performance of LDPC Coded OTFS Systems over High Mobility Channels - ztecommunications
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The Performance of LDPC Coded OTFS Systems over High Mobility Channels

ZHANG Chong, XING Wang, YUAN Jinhong, ZHOU Yiqing Click:211

Performance of LDPC Coded OTFS Systems over High Mobility Channels

ZHANG Chong1,2,3, XING Wang1,2,3, YUAN Jinhong4, ZHOU Yiqing1,2,3
(1. Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing 100190, China;
2. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China 3. University of Chinese Academy of Sciences, Beijing 100049, China 4. School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney NSW 2052, Australia)

Abstract: The upcoming 6G wireless networks have to provide reliable communications in high-mobility scenarios at high carrier frequencies. However, high-mobility or high carrier frequencies will bring severe inter-carrier interference (ICI) to conventional orthogonal frequency-division multiplexing (OFDM) modulation. Orthogonal time frequency space (OTFS) modulation is a recently developing multi-carrier transmission scheme for wireless communications in high-mobility environments. This paper evaluates the performance of coded OTFS systems. In particular, we consider 5G low density parity check (LDPC) codes for OTFS systems based on 5G OFDM frame structures over high mobility channels. We show the performance of the OTFS systems with 5G LDPC codes when sum-product detection algorithm and iterative detection and decoding are employed. We also illustrate the effect of channel estimation error on the performance of the LDPC coded OTFS systems.

Keywords: OTFS; LDPC codes; LDPC

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