Research on OTSM Iterative Detection Algorithm in High-speed Mobile Environment

LI Guojun; LONG Kun; YE Changrong; LIANG Jiawen

doi:10.11999/JEIT220541

Volume 45 Issue 6

Jun. 2023

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LI Guojun, LONG Kun, YE Changrong, LIANG Jiawen. Research on OTSM Iterative Detection Algorithm in High-speed Mobile Environment[J]. Journal of Electronics & Information Technology, 2023, 45(6): 2098-2104. doi: 10.11999/JEIT220541

Citation:

LI Guojun, LONG Kun, YE Changrong, LIANG Jiawen. Research on OTSM Iterative Detection Algorithm in High-speed Mobile Environment[J]. Journal of Electronics & Information Technology, 2023, 45(6): 2098-2104. doi: 10.11999/JEIT220541

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Research on OTSM Iterative Detection Algorithm in High-speed Mobile Environment

doi: 10.11999/JEIT220541

LI Guojun^{1, 2},
LONG Kun^{1, 3},
YE Changrong^{1, 2, 4
,
,},
LIANG Jiawen^{1, 2}

1.
Lab of Beyond LOS Reliable Information Transmission, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2.
School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
3.
School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
4.
Postdoctoral Research Workstation of Chongqing Key Laboratory of Optoelectronic Information Sensing and Transmission Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The National Key R& D Program of China (2019YFC1511300), Chongqing Basic Research and Frontier Exploration Project (cstc2021ycjh-bgzxm0072)

Received Date: 2022-05-05
Rev Recd Date: 2022-09-15

Available Online: 2022-10-13

Publish Date: 2023-06-10

Abstract

Abstract

Orthogonal Time Sequency Multiplexing (OTSM) multiplexes information symbols in the delay-sequence domain through concatenated time division and Walsh-Hadamard multiplexing. Due to the Walsh-Hadamard Transform (WHT) does not require complex multiplication operations in the modulation and demodulation process, it has lower modulation complexity than Orthogonal Time-Frequency Space (OTFS). In this paper, a two-stage equalizer is proposed for OTSM systems in high-speed mobile environments. First, low-complexity MMSE detection is performed block-by-block in the time domain by utilizing the sparsity and band structure of the channel matrix; Then Gauss-Seid (GS) iterative detection further removes residual symbol interference. The simulation results show that, compared with the GS iterative detection algorithm based on single-tap frequency domain equalization, the proposed algorithm has a performance gain of 1.8 dB when 16QAM modulation is used and the bit error rate is 10^–4.
- Orthogonal Time Sequency Multiplexing(OTSM),
- Delay-sequence domain,
- Walsh-Hadamard transform,
- Gauss Seidel iterative detection

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References(20)

References

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