基于离散哈特莱变换的LACO-OFDM低复杂度接收方法研究

陆超峰; 李建华; 汪井源; 赵继勇; 戚艾林; 徐智勇

doi:doi:10.13921/j.cnki.issn1002-5561.2023.02.010

光通信技术, 2023, 47 (2): 48, 网络出版: 2023-03-30

基于离散哈特莱变换的LACO-OFDM低复杂度接收方法研究

Study of LACO-OFDM low-complexity reception method based on discrete Hartley transform

论文大纲

陆超峰李建华汪井源赵继勇戚艾林徐智勇

作者单位

中国人民解放军陆军工程大学, 南京 210007

摘要

在分层非对称限幅光正交频分复用(LACO-OFDM)中, 采用离散哈特莱变换(DHT)可以弥补采用快速傅里叶变换(FFT)时存在的频谱效率不高的缺陷, 但在接收端多层信号的分离仍存在计算复杂度高的问题。结合DHT-LACO-OFDM信号的时域对称和反对称特性, 提出一种基于时域重构的分层信号接收方法, 在时域把叠加的信号进行分层接收。研究结果表明, 相比于传统的时频域结合的迭代接收方式, 基于时域重构的分层信号接收方法在误比特性能上与传统的迭代接收方式几乎相同, 但计算复杂度约降低为原来的一半。

Abstract

In the layered asymmetric clipped optical orthogonal frequency division multiplexing (LACO-OFDM), the use of discrete Hartley transform(DHT) can makes up for the low spectral efficiency of fast Fourier transform (FFT), but there is still a problem of high computational complexity in the separation of multi-layer signals at the receiving end. Combined with the time-domain symmetry and anti-symmetry characteristics of the DHT-LACO-OFDM signal, a layered signal receiving method based on time domain reconstruction is proposed, in which the superimposed signal is received layered in the time domain. The results of the study show that, compared with the traditional iterative receiving method combining time-frequency domain, the layered signal receiving method based on time-domain reconstruction has almost the same bit error performance as the traditional iterative receiving method, but the computational complexity is reduced by half.

参考文献

[1] 陈勇, 李雷, 刘焕淋. Hartley变换离散多音调制在可见光通信中的应用[J]. 半导体光电, 2016, 37(1): 100-103.

[2] 迟楠, 陈慧. 高速可见光通信的前沿研究进展[J]. 光电工程, 2020, 47(3): 6-17.

[3] 白菊蓉. OFDM系统峰均比抑制技术与应用研究[D]. 西安: 西北工业大学, 2018: 2-4.

[4] 唐芳, 徐智勇, 汪井源, 等. DCO-OFDM系统中导频辅助峰均比抑制技术[J]. 光电子·激光, 2019, 30(10): 1116-1122.

[5] 徐宪莹, 岳殿武. 可见光通信中正交频分复用调制技术[J]. 中国光学, 2021, 14(3): 516-527.

[6] MOREOLO M S, MU?譙OZ R, JUNYENT G. Novel power efficient optical OFDM based on Hartley transform for intensity-modulated direct-detection systems[J]. Journal of lightwave Technology, 2010, 28(5): 798-805.

[7] HU W W. PAPR reduction in DCO-OFDM visible light communication systems using optimized odd and even sequences combination[J]. IEEE Photonics Journal, 2019, 11(1): 1-15.

[8] WANG T Q, LI H, HUANG X. Analysis and mitigation of clipping noise in layered ACO-OFDM based visible light communication systems[J]. IEEE Transactions on Communications, 2018, 67(1): 564-577.

[9] DISSANAYAKE S D, ARMSTRONG J. Comparison of ACO-OFDM, DCO-OFDM and ADO-OFDM in IM/DD systems[J]. Journal of Lightwave Technology, 2013, 31(7): 1063-1072.

[10] RANJHA B, KAVEHRAD M. Hybrid asymmetrically clipped OFDM-based IM/DD optical wireless system[J]. Journal of Optical Communica-tions and Networking, 2014, 6(4): 387-396.

[11] WU N, BAR-NESS Y. A novel power-efficient scheme asymmetrically and symmetrically clipping optical(ASCO)-OFDM for IM/DD optical systems[J]. EURASIP Journal on Advances in Signal Processing, 2015, 2015(1): 1-10.

[12] WANG Q, QIAN C, GUO X, et al. Layered ACO-OFDM for intensity- modulated direct-detection optical wireless transmission[J]. Optics Express, 2015, 23(9): 12382-12393.

[13] ZHANG X, WANG Q, ZHANG R, et al. Performance analysis of layered ACO-OFDM[J]. IEEE Access, 2017, 5: 18366-18381.

[14] AZIM A W, LE G Y, MAURY G. Spectrally augmented Hartley transform precoded asymmetrically clipped optical OFDM for VLC[J]. IEEE Photonics Technology Letters, 2018, 30(23): 2029-2032.

[15] AZIM A W, LE G Y, MAURY G. Performance analysis of precoded layered ACO-OFDM for visible light communication systems[J]. Optics Communications, 2019, 440: 49-60.

[16] RANJHA B, KAVEHRAD M. Hybrid asymmetrically clipped OFDM-based IM/DD optical wireless system[J]. Journal of Optical Communications and Networking, 2014, 6(4): 387-396.

[17] DISSANAYAKE S D, ARMSTRONG J. Comparison of ACO-OFDM, DCO-OFDM and ADO-OFDM in IM/DD systems[J]. Journal of Lightwave Technology, 2013, 31(7): 1063-1072.

[18] 李炉焦, 陈君, 唐志军, 等. 光无线通信中基于哈特莱变换的翻转OFDM技术[J]. 光学学报, 2021, 41(19): 82-88.

陆超峰, 李建华, 汪井源, 赵继勇, 戚艾林, 徐智勇. 基于离散哈特莱变换的LACO-OFDM低复杂度接收方法研究[J]. 光通信技术, 2023, 47(2): 48. LU Chaofeng, LI Jianhua, WANG Jingyuan, ZHAO Jiyong, QI Ailin, XU Zhiyong. Study of LACO-OFDM low-complexity reception method based on discrete Hartley transform[J]. Optical Communication Technology, 2023, 47(2): 48.

基于离散哈特莱变换的LACO-OFDM低复杂度接收方法研究

关于本站 Cookie 的使用提示

全站搜索

基于离散哈特莱变换的LACO-OFDM低复杂度接收方法研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索