Iterative rake equalization method for low-complexity OTSM in high-speed mobile environment

Guojun LI; Kun LONG; Changrong YE; Jiawen LIANG

doi:10.11959/j.issn.1000-436x.2022203

您当前的位置：

首页 >

文章列表页 >

Iterative rake equalization method for low-complexity OTSM in high-speed mobile environment

Papers | 更新时间：2024-06-05

- Iterative rake equalization method for low-complexity OTSM in high-speed mobile environment
- Journal on Communications Vol. 43, Issue 10, Pages: 86-93(2022)
- 作者机构：
  
  1. 重庆邮电大学超视距可信信息传输研究所，重庆 400065
  2. 重庆邮电大学光电工程学院，重庆 400065
  3. 重庆邮电大学通信与信息工程学院，重庆 400065
  4. 重庆邮电大学光电信息感测与传输技术重庆市重点实验室博士后科研工作站，重庆 400065
- 作者简介：
- 基金信息：
  
  The National Key Research and Development Program of China(2019YFC1511300);The Natural Science Foundation of Chongqing(cstc2021ycjh-bgzxm0072)
- DOI：10.11959/j.issn.1000-436x.2022203
  CLC： TN926
- Online First：2022-10，
  
  Published：25 October 2022
- 稿件说明：
移动端阅览
Guojun LI, Kun LONG, Changrong YE, et al. Iterative rake equalization method for low-complexity OTSM in high-speed mobile environment[J]. Journal on Communications, 2022, 43(10): 86-93.
DOI：

Guojun LI, Kun LONG, Changrong YE, et al. Iterative rake equalization method for low-complexity OTSM in high-speed mobile environment[J]. Journal on Communications, 2022, 43(10): 86-93. DOI： 10.11959/j.issn.1000-436x.2022203.

摘要

摘要：针对现有正交时序复用（OTSM）均衡方法抗噪性能不佳、计算复杂度高的问题，提出了一种基于最大比合并（MRC）的低复杂度迭代rake均衡器。其主要思想是利用MRC在时延-时域中迭代提取并相干合并发射符号的接收多径分量，以提高合并信号的信噪比。为加快MRC迭代算法收敛，设计了一种单抽头时频均衡器为其提供初始估计，随后结合外部纠错码进一步提高误码性能。仿真结果表明，基于MRC的迭代rake均衡器性能显著优于LMMSE线性均衡器，与目前广泛使用的高斯-赛德（GS）迭代均衡器相比，性能和计算复杂度都有较大提升。

Abstract

Aiming at the problems of poor anti-noise performance and high computational complexity of the existing orthogonal time sequency multiplexing (OTSM) equalization methods

a low-complexity iterative rake equalizer based on maximum ratio combining (MRC) was proposed.The main idea was to use MRC to iteratively extract and coherently combine the received multipath components of the transmitted symbols in the delay-time domain to improve the signal-to-noise ratio of the combined signal.In order to speed up the convergence of the MRC iterative algorithm

a single-tap time-frequency equalizer was designed to provide an initial estimate

and then combined with an external error correction code to further improve the bit error performance.The simulation results show that the performance of the iterative rake equalizer based on MRC is significantly better than that of the LMMSE linear equalizer

and the performance and computational complexity are greatly improved compared with the currently widely used Gauss-Seidel (GS) iterative equalizer.

关键词

Keywords

references

WANG Y R , WANG G P , XU R T , et al . Joint channel estimation and data detection for intelligent transparent surface (ITS) aided wireless communications on railways [C ] // Proceedings of 2021 13th International Conference on Wireless Communications and Signal Processing (WCSP) . Piscataway:IEEE Press , 2021 : 1 - 5 .

JIANG T , CHEN H H , WU H C , et al . Channel modeling and inter-carrier interference analysis for V2V communication systems in frequency-dispersive channels [J ] . Mobile Networks and Applications , 2010 , 15 ( 1 ): 4 - 12 .

WANG C X , HUANG J , WANG H M , et al . 6G wireless channel measurements and models:trends and challenges [J ] . IEEE Vehicular Technology Magazine , 2020 , 15 ( 4 ): 22 - 32 .

HASHIMOTO N , OSAWA N , YAMAZAKI K , et al . Channel estimation and equalization for CP-OFDM-based OTFS in fractional Doppler channels [C ] // Proceedings of 2021 IEEE International Conference on Communications Workshops . Piscataway:IEEE Press , 2021 : 1 - 7 .

HADANI R , RAKIB S , TSATSANIS M , et al . Orthogonal time frequency space modulation [C ] // Proceedings of 2017 IEEE Wireless Communications and Networking Conference . Piscataway:IEEE Press , 2017 : 1 - 6 .

HADANI R , MONK A . OTFS:a new generation of modulation addressing the challenges of 5G [J ] . arXiv Preprint,arXiv:1802.02623 , 2018 .

AUGUSTINE R M , SURABHI G D , CHOCKALINGAM A . Space-time coded OTFS modulation in high-Doppler channels [C ] // Proceedings of 2019 IEEE 89th Vehicular Technology Conference . Piscataway:IEEE Press , 2019 : 1 - 6 .

THAJ T , VITERBO E , HONG Y . Orthogonal time sequency multiplexing modulation:analysis and low-complexity receiver design [J ] . IEEE Transactions on Wireless Communications , 2021 , 20 ( 12 ): 7842 - 7855 .

KONDO S , MILSTEIN B . Performance of multicarrier DS CDMA systems [J ] . IEEE Transactions on Communications , 1996 , 44 ( 2 ): 238 - 246 .

IMADA S . Pre-rake diversity combining for UWB systems in IEEE 802.15 UWB multipath channel [J ] . IEICE Transactions on Communications , 2005 , 88 ( 5 ): 2193 - 2199 .

DONG X F , BEAULIEU N C . Optimal maximal ratio combining with correlated diversity branches [J ] . IEEE Communications Letters , 2002 , 6 ( 1 ): 22 - 24 .

BUEHRER R M , NICOLOSO S P , GOLLAMUDI S . Linear versus non-linear interference cancellation [J ] . Journal of Communications and Networks , 1999 , 1 ( 2 ): 118 - 133 .

LI L , WEI H , HUANG Y , et al . A simple two-stage equalizer with simplified orthogonal time frequency space modulation over rapidly time-varying channels [J ] . arXiv Preprint,arXiv:1709.02505 , 2017 .

STOFFER D S . Walsh-Fourier analysis and its statistical applications [J ] . Journal of the American Statistical Association , 1991 , 86 ( 414 ): 461 - 479 .

HARMUTH H F . Applications of Walsh functions in communications [J ] . IEEE Spectrum , 1969 , 6 ( 11 ): 82 - 91 .

RAVITEJA P , HONG Y , VITERBO E , et al . Practical pulse-shaping waveforms for reduced-cyclic-prefix OTFS [J ] . IEEE Transactions on Vehicular Technology , 2019 , 68 ( 1 ): 957 - 961 .

THAJ T , VITERBO E . Orthogonal time sequency multiplexing modulation [C ] // Proceedings of 2021 IEEE Wireless Communications and Networking Conference . Piscataway:IEEE Press , 2021 : 1 - 7 .

VERMA A , SHRESTHA R . A new VLSI architecture of next-generation QC-LDPC decoder for 5G new-radio wireless-communication standard [C ] // 2020 IEEE International Symposium on Circuits and Systems (ISCAS) . Piscataway:IEEE Press , 2020 : 1 - 5 .

PERAL-ROSADO J A D , LÓPEZ-SALCEDO J A , SECO-GRANADOS G , et al . Evaluation of the LTE positioning capabilities under typical multipath channels [C ] // Proceedings of 2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC) . Piscataway:IEEE Press , 2012 : 139 - 146 .

Views

903

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

B-LMMSE-PIC iterative detection method for OTSM in high-speed mobile environment

Iterative interference cancellation based on decoding algorithm of space-time block coding in frequency-selective fading

Related Author

LI Guojun

ZHENG Xiang

WANG Jie

DONG Tao

YOU Xiao-hu

Related Institution

National Mobile Communications Research Laboratory, Southeast University

东南大学移动通信国家重点实验室

AI问答

⁰