Precoding-Enabled FBMC/OQAM for Short-Reach IMDD Transmission

Chen, Ming; Deng, Aitao; Zhang, Long; Li, Ruizi; Yang, Jing; Zhou, Hui; Chen, Qinghui; Cheng, Yun

doi:10.1109/lpt.2021.3118838

Cited by 12 publications

(4 citation statements)

References 16 publications

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“…As is known, HACO-OFDM and LACO-OFDM schemes normally combat the time dispersion by inserting the CP between each data block, but LO-OFDM/OQAM scheme uses a well time-frequency localized filter with high sidelobes suppression ratio instead of CP, therefore making it more efficient in bandwidth than HACO-OFDM and LACO-OFDM schemes. 17,19,20 Actually, the simulation results can serve as a reference for the real applications such as system design and performance prediction. , to obtain the BER lower than 10 −4 in the entire office2 with the LO-OFDM/OQAM scheme, the required ATOPs are at least 1.1 and 0.5 W, respectively, when the spectral efficiency are 5 and 3.5 (bits/channel use).…”

Section: Resultsmentioning

confidence: 99%

“…1, and higher spectral efficiency without considering the CP. As is known, HACO-OFDM and LACO-OFDM schemes normally combat the time dispersion by inserting the CP between each data block, but LO-OFDM/OQAM scheme uses a well time-frequency localized filter with high sidelobes suppression ratio instead of CP, therefore making it more efficient in bandwidth than HACO-OFDM and LACO-OFDM schemes 17 , 19 , 20 …”

Section: Resultsmentioning

confidence: 99%

“…11,12 In addition, OFDM-based systems are highly sensitive to synchronization errors in time-and frequency-domain, 13,14 and the use of cyclic prefix (CP) will result in decreasing the spectral efficiency. 15 As an alternative to OFDM-based systems, orthogonal frequency division multiplexing with offset quadrature amplitude modulation (OFDM/OQAM)-based systems have the advantages of lower out-of-band emission, 16,17 higher spectral efficiency, 15 and more robust to timing and frequency mismatches than OFDM, 18 which are owing to the use of a well time-frequency localized filter with high sidelobes suppression ratio instead of CP. 12 Figure 1 shows the magnitude responses comparision between OFDM/ OQAM and OFDM systems.…”

Section: Introductionmentioning

confidence: 99%

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Multilayered optical orthogonal frequency division multiplexing with offset quadrature amplitude modulation for visible light communication systems

Shi,

Wang,

Wang

et al. 2023

Opt. Eng.

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.A multilayered optical orthogonal frequency division multiplexing with offset quadrature amplitude modulation (LO-OFDM/OQAM) scheme is proposed for visible light communication (VLC) systems, which is inspired by the enhance optical OFDM/OQAM (EO-OFDM/OQAM) scheme. In this scheme, multiple layers of data are superimposed on the normal branch to further improve the spectral efficiency and power efficiency of the VLC systems. Specifically, the negative time-domain signals on each layer can be directly clipped as zeros without losing any information and demolishing the real-field orthogonal condition of the optical OFDM/OQAM system. Theoretical derivation is then given to prove the feasibility. Spectral efficiency, peak-to-average power ratio performance, bit error rate (BER) performance, and power efficiency of this proposed scheme are further investigated and compared with those of its counterparts. Simulation results show that the proposed LO-OFDM/OQAM scheme could achieve better BER performance in comparison with EO-OFDM/OQAM and DCO-OFDM/OQAM schemes, and at the same time, it is more power efficient. Our work would benefit the research and development of VLC systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multilayered optical orthogonal frequency division multiplexing with offset quadrature amplitude modulation for visible light communication systems

Shi,

Wang,

Wang

et al. 2023

Opt. Eng.

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“…Filter bank multi carrier (FBMC) communication is a promising waveform design candidate in incoming intensity modulation/direct detection (IM/DD)-based VLC system by RF/VLC networks [13][14][15]. This is due to several reasons: i) it has lower out-of-band (OOB) emissions [16]; ii) it has higher spectrum efficiency because it does not use cyclic prefix (CP) [17]; iii) it has higher immunity to environment effects such as scattering and shadowing [18].…”

Section: Introductionmentioning

confidence: 99%

A complexity efficient PAPR reduction scheme for FBMC-based VLC systems

2024

Opto-Electronics Review

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Visible light communication based on a filter bank multicarrier holds enormous promise for optical wireless communication systems, due to its high-speed and unlicensed spectrum. Moreover, visible light communication techniques greatly impact communication links for small satellites like cube satellites, and pico/nano satellites, in addition to inter-satellite communications between different satellite types in different orbits. However, the transmitted visible signal via the filter bank multicarrier has a high amount of peak-toaverage power ratio, which results in severe distortion for a light emitting diode output. In this work, a scheme for enhancing the peak-to-average power ratio reduction amount is proposed. First, an algorithm based on generating two candidates signals with different peakto-average power ratio is suggested. The signal with the lowest ratio is selected and transmitted. Second, an alternate direct current-biased approach, which is referred to as the addition reversed method, is put forth to transform transmitted signal bipolar values into actual unipolar ones. The performance is assessed through a cumulative distribution function of peak-to-average power ratio, bit error rate, power spectral density, and computational complexity. The simulation results show that, compared to other schemes in literature, the proposed scheme attains a great peak-to-average power ratio reduction and improves the bit the error rate performance with minimum complexity overhead. The proposed approach achieved about 5 dB reduction amount compared to companding technique, 5.5 dB compared to discrete cosine transform precoding, and 8 dB compared to conventional direct current bias of an optical filter bank multicarrier. Thus, the proposed scheme reduces the complexity overhead by 15.7% and 55.55% over discrete cosine transform and companding techniques, respectively.

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