Performance of grey‐coded IQM‐based optical modulation formats on high‐speed long‐haul optical communication link

Kakati, Dhiman; Arya, Subhash C.

doi:10.1049/iet-com.2019.0205

Cited by 14 publications

(5 citation statements)

References 38 publications

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“…Finally, by applying the proper thresholds to the received constellation slices, we can identify the symbols (and bits) that were transmitted via the fiber. The term OSNR describes the proportion of a transmission link's signal optical power to its noise optical power which is expressed in Eq.1 [13]. The level of optical noise interference on optical signals inside a valid BW is measured using OSNR.…”

Section: Results Analysismentioning

confidence: 99%

“…At present Time Division Multiplexing (TDM), and WDM technologies are introduced to meet the demand for more capacity and are used to multiplexes several channels. To handle higher modulation impairment Digital Coherent Transmission (DCT) technologies are used to provide additional spectral efficiency [13]. WDM and TWDM [14] will be the top two technology choices for back-haul and front-haul access network design and deployment.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of System Capacity and Spectral Efficiency of Fixed-Grid Network

Malathi,

Kumar

2023

IJCNC

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In this article, the performance of a fixed grid network is examined for various modulation formats to estimate the system's capacity and spectral efficiency. The optical In-phase Quadrature Modulator (IQM) structure is used to build a fixed grid network modulation, and the homodyne detection approach is used for the receiver. Data multiplexing is accomplished using the Polarization Division Multiplexed (PDM) technology. 100 Gbps, 150 Gbps, and 200 Gbps data rates are transmitted under these circumstances utilizing various modulation formats. Various pre-processing and signal recovery steps are explained by using modern digital signal processing systems. The achieved spectrum efficiencies for PM-QPSK, PM-8 QAM, and PM-16 QAM, respectively, were 2, 3, and 4 (bits/s)/Hz. Different modulation like PM-QPSK, PM-8-QAM, and PM-16-QAM each has system capacities of 8-9, 12-13.5, and 16-18 Tbps and it reaches transmission distances of 3000, 1300, and 700 kilometers with acceptable Bit Error Rate (BER≤ 2× 10-3 ) respectively. Peak optical power for received signal detection and full width at half maximum is noted for the different modulations under a fixed grind network.

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Section: Results Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of System Capacity and Spectral Efficiency of Fixed-Grid Network

Malathi,

Kumar

2023

IJCNC

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“…Figures 12(a) to 12(d) explain that the constellation of the proposed model is much improved by using the qualified receiver than DCF or conventional DSP receiver for the DP-QPSK-based FOCS. Table 2 presents a comparison of performance for the presented work with two other relevant work [17,18] based on DP-QPSK modulation-supported FOCS. Table 2 mentions the improvement in receiver sensitivity (as shown in Figure 10) with a very low BER as compared with the recently presented work on DP-QPSK.…”

Section: Resultsmentioning

confidence: 99%

“…As dispersion also causes power loss for the system, DSP techniques which provide power efficiency [16] can enable high data rates for such cases. DP-QPSK has been shown to provide high data rates with the use of dispersion compensation fiber and DSP techniques [17]. DSP techniques are a powerful tool to compensate optical fiber transmission impairments in single carrier systems as shown by many researchers to achieve high capacity and error-free transmission.…”

Section: Related Workmentioning

confidence: 99%

Time Domain Equalization and Digital Back-Propagation Method-Based Receiver for Fiber Optic Communication Systems

Muhammad

Ali

Habib

et al. 2020

International Journal of Optics

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Fiber optic communication systems (FOCSs) have attained a lot of attention by revolutionizing the telecommunication industry and offering new possibilities with the technical advancements in state-of-the-art high speed digital electronics. Advanced modulation formats make use of the phase, amplitude, and polarization of the optical signals at the same time to provide high spectral efficiency as compared with 1 bit/s/Hz for the intensity modulation direct detection system (IMDD), but are highly prone to transmission impairments. Thus, the effects that add up to the optical fiber impairments such as optical fiber chromatic dispersion (OFCD), polarization model dispersion (PMD), and phase offset and noise (POaN) need to be addressed at the receiver side. The development of components and algorithms to minimize these effects in next generation FOCSs with 100 Gbps data rate and beyond with long-haul transmission is still a challenging issue. In this paper, digital signal processing- (DSP-) assisted dispersion and nonlinear compensation techniques are presented to compensate for physical layer impairments including OFCD, PMD, and POaN. The simulations are performed considering Dual Polarization- (DP-) QPSK modulation format to achieve two-fold data rate to achieve spectral efficiency of 3.28 bits/s/Hz by making use of the polarization diversity and system performance is investigated in terms of bit error rate (BER), constellation diagrams, and quality factor (Q-factor) for different values of optical signal-to-noise ratio (OSNR), launch power (PL), and fiber length.

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“…Tables 2, 3 show haze levels with their attenuations and fog levels with their attenuations, respectively [34].…”

Section: Haze and Fog Conditionsmentioning

confidence: 99%

Design of a High-Speed OFDM-SAC-OCDMA-Based FSO System Using EDW Codes for Supporting 5G Data Services and Smart City Applications

Singh

Kříž²,

Kamruzzaman³

et al. 2022

Front. Phys.

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A novel free space optics (FSO) system is introduced in this article by combining orthogonal frequency division multiplexing (OFDM) with spectral amplitude coding optical code division multiple access (SAC-OCDMA) to be implemented in 5G technology and smart cities. Enhanced double-weight (EDW) codes are used as signature codes, while for the detection technique, single photodiode detection (SPD) is applied for the SAC-OCDMA system. OFDM with a four-quadrature amplitude modulation (4-QAM) scheme is assigned to the three users in the SAC-OCDMA system, each carrying 15 Gbps. Adverse weather conditions, such as clear, fog, haze, rain, and dust storm, that affect the FSO channel are considered. The performance of the proposed system is evaluated in terms of log of bit error rate and received power at different propagation distances. The simulation results show successful transmission of 3 × 15 Gbps with a propagation range of 3.45 km under clear air and 1.316, 1.045, and 0.7 km under rain conditions (light, medium, and heavy rain) with a received power of −12.6 dBm. As for haze conditions, the range and received power are 2.391 km with −13 dBm for low haze, 1.591 km with −12.7 dBm for medium haze, and 1.025 km with −12.6 dBm for heavy haze. The range is reduced and becomes 1.085, 0.784, and 0.645 km under fog conditions (light, medium, and heavy fog) with −12.6 dBm received power. Furthermore, the system achieved a range of 0.681, 0.232, and 0.102 km under dust conditions (light, medium, and heavy dust) with a received power of −16 dBm.

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Performance of grey‐coded IQM‐based optical modulation formats on high‐speed long‐haul optical communication link

Cited by 14 publications

References 38 publications

Analysis of System Capacity and Spectral Efficiency of Fixed-Grid Network

Analysis of System Capacity and Spectral Efficiency of Fixed-Grid Network

Time Domain Equalization and Digital Back-Propagation Method-Based Receiver for Fiber Optic Communication Systems

Design of a High-Speed OFDM-SAC-OCDMA-Based FSO System Using EDW Codes for Supporting 5G Data Services and Smart City Applications

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