| 一种计算机序列搜索的DMRS序列生成方法 |
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| 引用本文： | 周本升,崔太平,涂艳丽,张晨璐,李佳林,刘是枭. 一种计算机序列搜索的DMRS序列生成方法[J]. 重庆邮电大学学报(自然科学版), 2021, 33(2): 209-216. DOI: 10.3979/j.issn.1673-825X.201905070179 |
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| 作者姓名： | 周本升 崔太平 涂艳丽 张晨璐 李佳林 刘是枭 |
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| 作者单位： | 重庆邮电大学 通信与信息工程学院,重庆400065;重庆邮电大学 移动通信技术重庆市重点实验室,重庆400065;中国移动通信集团设计院有限公司 重庆分公司,重庆400065;重庆邮电大学 通信与信息工程学院,重庆400065;重庆邮电大学 移动通信技术重庆市重点实验室,重庆400065;维沃移动通信有限公司 (深圳)5G研发中心,深圳,518000;重庆邮电大学 通信与信息工程学院,重庆400065;维沃移动通信有限公司 (深圳)5G研发中心,深圳,518000 |
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| 基金项目： | 长江学者创新研究团队（IRT1299）；重庆市科委重点实验室专项经费（CSTC） |
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| 摘 要： | 在信号传输过程中,高峰均功率比会使功率放大器工作在非线性区域,造成放大后信号失真.对3GPP(3rd generation partnership project)协议中现有物理上行共享信道在采用DFT-S-OFDM(discrete Fourier transform spread orthogonal freque...
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| 关 键 词： | 解调参考信号 峰值平均功率比 序列搜索 自相关 互相关 |
| 收稿时间： | 2019-05-07 |
| 修稿时间： | 2020-12-23 |
A method for generating DMRS based on computer searching |
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| ZHOU Bensheng,CUI Taiping,TU Yanli,ZHANG Chenlu,LI Jialin,LIU Shixiao. A method for generating DMRS based on computer searching[J]. Journal of Chongqing University of Posts and Telecommunications, 2021, 33(2): 209-216. DOI: 10.3979/j.issn.1673-825X.201905070179 |
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| Authors: | ZHOU Bensheng CUI Taiping TU Yanli ZHANG Chenlu LI Jialin LIU Shixiao |
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| Affiliation: | School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China;Chongqing Key Laboratory of Mobile Communications Technology, Chongqing 400065, P. R. China;LTD Chongqing Branch, China Mobile Communication Group Design Institute Co., Chongqing 400065, P. R. China;School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China;Chongqing Key Laboratory of Mobile Communications Technology, Chongqing 400065, P. R. China;5G R&D Center, ViVo Mobile Communication Co., Ltd, Shenzhen 518000, P. R. China |
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| Abstract: | In the process of signal transmission, the high peak-to-average power ratio (PAPR) will cause the power amplifier to operate in the nonlinear region and distort the signal after amplification. In this paper, a new approach of generating base sequence with low peak-to-average power ratio is proposed for the existing physical uplink shared channel (PUSCH) in 3rd Generation Partnership Project(3GPP) protocol when DFT-S-OFDM waveform transmission is adopted and demodulation reference signal (DMRS) sequence length is less than 30. Meanwhile, the coverage range and anti-interference ability of DMRS are also considered as search conditions. Therefore, when searching sequences, we firstly consider and search according to the sequence''s own attributes, namely the sequence''s autocorrelation value and PAPR value. Then, the cross-correlation between sequences and other sequences is taken as search condition to enhance the anti-interference ability of DMRS signals. Finally, through the final search of demodulation performance in the communication system, the sequence with relatively good demodulation performance is selected. Compared with the existing base sequence, the proposed base sequences have obvious advantages in PAPR value and auto-correlation, and also in performance of cross-correlation and demodulation. |
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| Keywords: | demodulation reference signal(DMRS) peak-to-average power ratio(PAPR) sequence searching auto-correlation cross-correlation |
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