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Optical GFDM: an improved alternative candidate for indoor visible light communication
Photonic Network Communications ( IF 1.7 ) Pub Date : 2020-02-18 , DOI: 10.1007/s11107-019-00877-5
Rizwana Ahmad , Anand Srivastava

This paper proposes generalized frequency division multiplexing (GFDM) for indoor visible light communication (VLC). GFDM is a flexible multi-carrier scheme that allows engineering in both time and frequency domain, therefore, making GFDM suitable for various 5G applications. In the literature, different types of optical orthogonal frequency division multiplexing (O-OFDM) have been proposed for VLC including direct current offset optical OFDM (DCO-OFDM), asymmetrically clipped optical OFDM (ACO-OFDM), Flip-OFDM, etc. O-OFDM can provide high data rate, but it suffers from the problem of the high peak-to-average power ratio (PAPR) which causes clipping distortion, reduces the illumination-to-communication conversion efficiency and affects the lifetime of the LED. The proposed optical GFDM (O-GFDM) scheme for VLC is analyzed for various performance metrics against the O-OFDM counterpart. The analytical expression for symbol error rate (SER) of O-GFDM is derived and simulation results based on PAPR, SER and subcarrier frequency shift tolerance validate the improved performance of the proposed O-GFDM scheme. It is found that one of the variants of the proposed scheme has better spectral efficiency and lower power consumption compared with O-OFDM counterpart. As GFDM is being considered for 5G wireless systems, it is expected that the GFDM-based VLC system will very well gel with next-generation wireless systems to offer seamless services and will provide greater flexibility using software-defined networking.

中文翻译:

光学GFDM:室内可见光通信的一种改进的替代选择

本文提出了用于室内可见光通信(VLC)的广义频分复用(GFDM)。GFDM是一种灵活的多载波方案,允许在时域和频域中进行工程设计,因此使GFDM适合各种5G应用。在文献中,已经针对VLC提出了不同类型的光学正交频分复用(O-OFDM),包括直流偏移光学OFDM(DCO-OFDM),非对称限幅光学OFDM(ACO-OFDM),Flip-OFDM等。 O-OFDM可以提供高数据速率,但存在高峰均功率比(PAPR)的问题,该问题会导致削波失真,降低照明通信转换效率并影响LED的寿命。针对OLC对应对象的各种性能指标,分析了针对VLC提出的光学GFDM(O-GFDM)方案。推导了O-GFDM符号误码率(SER)的解析表达式,并基于PAPR,SER和子载波频移容忍度的仿真结果验证了所提出的O-GFDM方案的性能。已经发现,与O-OFDM对应物相比,所提出的方案的变体之一具有更好的频谱效率和更低的功耗。由于正在考虑将GFDM用于5G无线系统,因此,基于GFDM的VLC系统有望与下一代无线系统完美融合,以提供无缝服务,并使用软件定义的网络提供更大的灵活性。推导了O-GFDM符号误码率(SER)的解析表达式,并基于PAPR,SER和子载波频移容忍度的仿真结果验证了所提出的O-GFDM方案的性能。已经发现,与O-OFDM对应物相比,所提出的方案的变体之一具有更好的频谱效率和更低的功耗。由于正在考虑将GFDM用于5G无线系统,因此,基于GFDM的VLC系统有望与下一代无线系统完美融合,以提供无缝服务,并使用软件定义的网络提供更大的灵活性。推导了O-GFDM符号误码率(SER)的解析表达式,并基于PAPR,SER和子载波频移容忍度的仿真结果验证了所提出的O-GFDM方案的性能。已经发现,与O-OFDM对应物相比,所提出的方案的变体之一具有更好的频谱效率和更低的功耗。由于GFDM正在考虑用于5G无线系统,因此,基于GFDM的VLC系统有望与下一代无线系统完美融合,以提供无缝服务,并使用软件定义的网络提供更大的灵活性。已经发现,与O-OFDM对应物相比,所提出的方案的变体之一具有更好的频谱效率和更低的功耗。由于正在考虑将GFDM用于5G无线系统,因此,基于GFDM的VLC系统有望与下一代无线系统完美融合,以提供无缝服务,并使用软件定义的网络提供更大的灵活性。已经发现,与O-OFDM对应物相比,所提出的方案的变体之一具有更好的频谱效率和更低的功耗。由于正在考虑将GFDM用于5G无线系统,因此,基于GFDM的VLC系统有望与下一代无线系统完美融合,以提供无缝服务,并使用软件定义的网络提供更大的灵活性。
更新日期:2020-02-18
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