Technology of Information Security
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App. Res. of Comp. Printed Article
Vol. 36, 2019 No. 2
549-552,557

Waveform adaptive algorithm for OFDM/OQAM system under air-ground channel

Li Huanyu1,2
Yang Chao1
Li Yanlong1,2
Wang Bo1,2
1. Key Laboratory of Cognitive Radio & Information Processing Information Processing, Guilin University of Electronic Technology, Guilin Guangxi 541004, China
2. Science & Technology on Information Transmission & Dissemination in Communication Networks Laboratory, The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China
DOI: 10.19734/j.issn.1001-3695.2017.07.0883

Abstract

The conventional adaptive waveform design of orthogonal frequency division multiplexing / offset quadrature amplitude modulation(OFDM/OQAM) system are mainly for the channel model of non-exponential-type delay power spectrum and non-U-type Doppler power spectrum. However, waveform adaptive design results in different channel matching criterion coefficients due to different channel models in practice. Therefore, this paper discussed the characteristics of ground air channel model and extended Gaussian function and proposed a new OFDM/OQAM waveform adaptive algorithm based on the traditional SINR-adaptive waveform design. This algorithm introduced a matching coefficient β into the traditional waveform matching criterion, which established the relation between the time-frequency domain and the maximum multipath delay-Doppler frequency shift of the waveform. Combined with the traditional optimization function of SINR, it optimized the parameters of the pulse shaping filter and then fed back to the transmitter to adjust the filter banks at the transmitter and receiver. Simulation results show that, under the modulation of 4QAM and 16QAM, the channel matching coefficient β has an improvement of 1.0 dB or more in the system error performance.

Foundation Support

国家自然科学基金资助项目(61371107)
广西无线宽带通信与信号处理重点实验室基金基金资助项目(GXKL061501)
认知无线电与信息处理教育部重点实验室2016年主任基金资助项目(LD16112X)
认知无线电与信息处理教育部重点实验室2015年主任基金资助项目(CRKL150111)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2017.07.0883
Publish at: Application Research of Computers Printed Article, Vol. 36, 2019 No. 2
Section: Technology of Information Security
Pages: 549-552,557
Serial Number: 1001-3695(2019)02-050-0549-04

Publish History

[2019-02-05] Printed Article

Cite This Article

李环宇, 杨超, 李燕龙, 等. 地空信道基于OFDM/OQAM系统的波形自适应算法 [J]. 计算机应用研究, 2019, 36 (2): 549-552,557. (Li Huanyu, Yang Chao, Li Yanlong, et al. Waveform adaptive algorithm for OFDM/OQAM system under air-ground channel [J]. Application Research of Computers, 2019, 36 (2): 549-552,557. )

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  • Application Research of Computers Monthly Journal
  • Journal ID ISSN 1001-3695
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Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

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