Comparison of different modulation techniques for optical OFDM Intensity Modulation and Direct Detection IM/DD system

Alhalabi, Mahmoud; El-Nahal, Fady I.; Taşpınar, Necmi

doi:10.1109/picece.2019.8747252

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…Hermitian symmetry method [21] is used to convert the complex signal to real and positive signal. In [22], OFDM IM/DD system with different modulation techniques was demonstrated such as QAM and Phase Shift Keying (PSK). 16-QAM and 16-PSK modulation with different number of subcarriers was applied to IM/DD system to achieve the best bit error rate (BER ) performance.…”

Section: Related Workmentioning

confidence: 99%

Performance investigation of long-haul high data rate optical OFDM IM/DD system with different QAM modulations

Taşpınar

Alhalabi

2021

Journal of Electrical Engineering

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In this paper and as a first time, we have designed and simulated 100 Gbps long haul intensity modulation and direct detection (IM/DD) optical orthogonal frequency division multiplexing (OFDM) system with high order modulation techniques by using optisystem software QAM IM/DD OFDM system was analyzed and simulated to provide high data rate for downstream signal by using dispersion compensation fiber (DCF) inside fiber link. 4-QAM OFDM system demonstrated the best BER performance compared to other simulated systems for long haul transmission distance. For comparison and investigation, important results as eye diagram, Q factor, Eb/No and BER are explained against propagation length for every simulated system.

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Section: Related Workmentioning

confidence: 99%

Performance investigation of long-haul high data rate optical OFDM IM/DD system with different QAM modulations

Taşpınar

Alhalabi

2021

Journal of Electrical Engineering

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“…After filtering out unnecessary noise by the band pass filter (BPF), the generated electric mm-wave signal is amplified by an electrical amplifier (EA) and transmitted to the user through the antenna. Due to it changes the optical intensity information, it is also called intensity modulation (IM) [16,17]. However, the modulation scheme is only divided into two working states with and without light or little light.…”

Section: Directly Modulated Laser (Dml)mentioning

confidence: 99%

Review on the Millimeter-Wave Generation Techniques Based on Photon Assisted for the RoF Network System

Xiao

Zhao

Feng

et al. 2020

Advances in Condensed Matter Physics

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With the development trend of wireless and broadband in the communication link and even the whole information industry, the demand of high-frequency microwave bandwidth has been increasing. The RoF network system solves the problem of spectrum congestion in low-frequency band by providing an effective technology for the distribution of high-frequency microwave signals over optical fiber links. However, the traditional mm-wave generation technique is limited by the bandwidth of electronic devices. It is difficult to generate high-frequency and low-phase noise mm-wave signals with pure electrical components. The mm-wave communication technology based on photon assisted can overcome the bandwidth bottleneck of electronic devices and provide the potential for developing the low-cost infrastructure demand of broadband mobile services. This paper will briefly explain the characteristics of the RoF network system and the advantages of high-frequency mm-wave. Then we, respectively, introduce the modulation schemes of RoF mm-wave generation based on photon assisted including directly modulated laser (DML), external modulation, and optical heterodyne. The review mainly focuses on a variety of different mm-wave generation technologies including multifrequency vector mm-wave. Furthermore, we list several approaches to realize the large capacity data transmission techniques and describe the digital signal processing (DSP) algorithm flow in the receiver. In the end, we summarize the RoF network system and look forward to the future.

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“…However, as intensity modulation with direct detection (IM/ DD) is applied in VLC, the value of transmitted signals is real, that is, no phase information can be provided, which leads to a high correlation of the VLC MIMO channel [7]. Consequently, the conventional MIMO scheme based on spatial multiplexing (SMP) cannot be applied successfully in the VLC system, as the bit error rate (BER) performance decreases sharply as soon as the channel is highly correlated.…”

Section: Introductionmentioning

confidence: 99%

Entropy Loading Design for the MIMO-OFDM Visible Light Communication System Using the OCT Precoding Technique

Guo

Zhao

Wang³

2020

Advances in Condensed Matter Physics

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In this paper, an orthogonal circulant matrix transform (OCT) precoding technique is proposed to combine with the entropy loading in the multiple-input multiple-output and orthogonal frequency division multiplexing (MIMO-OFDM) visible light communication (VLC) system where the space-time coding (STBC) is chosen for its robustness to the channel correlation. Benefitting from the OCT precoding technique, the uniform signal-to-noise ratio (SNR) among all the subchannels can be achieved. As a result, only one SNR value is required to be fed back, and the same distribution matcher is employed during probabilistic shaping (PS), which means much lower feedback overhead and system complexity than the conventional entropy loading scheme. Experimental results show that the OCT precoding does not cause the system performance loss where the achievable information rate (AIR) of the proposed system is comparable with the conventional system without precoding. With an available bandwidth of ∼25 MHz, the proposed scheme can realize the AIR of 50.75 Mb/s at the expense of 0.45% average forward error correction (FEC) overhead (OH).

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Comparison of different modulation techniques for optical OFDM Intensity Modulation and Direct Detection IM/DD system

Cited by 10 publications

References 6 publications

Performance investigation of long-haul high data rate optical OFDM IM/DD system with different QAM modulations

Performance investigation of long-haul high data rate optical OFDM IM/DD system with different QAM modulations

Review on the Millimeter-Wave Generation Techniques Based on Photon Assisted for the RoF Network System

Entropy Loading Design for the MIMO-OFDM Visible Light Communication System Using the OCT Precoding Technique

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