Comparative investigations of DWDM transmission system with PMD for different orthogonally modulated signals at 80 Gb/s

Bhatia, Richa; Sharma, Ajay K.; Saxena, Jyoti

doi:10.1002/dac.3076

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…Here, by using a first-order Taylor series expansion of Equation (2) and by neglecting the effect of signal phase-shift, we will show that sufficient accuracy is obtained in our imaging algorithm. However, in optical communications where wave mixing occurs, this approximation may not be proper, and higher orders of Taylor series expansion are needed [13, 14].…”

Section: Algorithmsmentioning

confidence: 99%

A modified Fresnel-based algorithm for 3D microwave imaging of metal objects

Zamiri

Nabavi

2018

Int. J. Microw. Wireless Technol.

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Microwave holography technique reconstructs a target image using recorded amplitudes and phases of the signals reflected from the target with Fast Fourier Transform (FFT)-based algorithms. The reconstruction algorithms have two or more steps of two- and three-dimensional Fourier transforms, which have a high computational load. In this paper, by neglecting the impact of target depth on image reconstruction, an efficient Fresnel-based algorithm is proposed, involving only one-step FFT for both single- and multi-frequency microwave imaging. Numerous tests have been performed to show the effectiveness of the proposed algorithm including planar and non-planar targets, using the raw data gathered by means of a scanner operating in X-band. Finally, a low-cost and high-speed hardware architecture based on fixed-point arithmetic is introduced which reconstructs the planar targets. This pipeline architecture was tested on field programmable gate arrays operating at 200 MHz clock frequency, which illustrates more than 30 times improvement in computation time compared with a computer.

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Section: Algorithmsmentioning

confidence: 99%

A modified Fresnel-based algorithm for 3D microwave imaging of metal objects

Zamiri

Nabavi

2018

Int. J. Microw. Wireless Technol.

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“…1,2 As a result, in current long-haul communication systems using different multiplexing methods such as subcarrier multiplexing (SCM), wavelength division multiplexing (WDM), and DWDM, 3 single-mode fiber is still the preferred choice for researchers. 4 The performance of a DWDM system with PMD at 80 Gb∕s in the presence of Kerr-nonlinear phenomena has been investigated. In multiple-channel communication systems, multiplexing techniques are used to enlarge the data rate of next-generation wireless communication systems; nevertheless, cross-phase modulation (XPM) is a performance-limiting issue.…”

Section: Introductionmentioning

confidence: 99%

“…To address the requirement for high network capacity throughout the world, next-generation dense wavelength division multiplexing (DWDM) technology will be operated at 400 Gb/s or 1 Gb/s 1 , 2 . As a result, in current long-haul communication systems using different multiplexing methods such as subcarrier multiplexing (SCM), wavelength division multiplexing (WDM), and DWDM, 3 single-mode fiber is still the preferred choice for researchers 4 . The performance of a DWDM system with PMD at 80 Gb/s in the presence of Kerr-nonlinear phenomena has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Performance optimization of radio over fiber system using particle swarm optimization algorithm against cross-phase modulation crosstalk

Jain

Bhatia

2022

Opt. Eng.

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.In this paper, the particle swarm optimization (PSO) algorithm is used to optimize the performance of a radio over fiber system against cross-phase modulation (XPM) crosstalk by finding the optimum value of crosstalk by independently considering the range of various fiber parameters in the V band (40 to 75 GHz) and W band (75 to 110 GHz). Results show that, without using any optimization technique, the crosstalk is found to be minimum at the small frequency in both frequency bands. Without optimization, XPM crosstalk is found to be −62.2, −56.2, and −52.7 dB at 40 GH, 75 and 110 GHz, respectively, at the fiber length of 20 km, whereas after PSO, XPM crosstalk is −65.4 and −71.9 dB at 75 and 110 GHz, respectively, at the high fiber length of 50 km. After applying the PSO optimization technique, XPM crosstalk is optimized with the minimum at high frequencies in both frequency bands at large fiber lengths. It is found that XPM is optimized at different values of the dispersion parameter without the use of a dispersion-shifted fiber. Joint optimization is also done for the complete range of frequencies from 40 to 110 GHz, and optimized crosstalk is obtained independently at high frequencies and large fiber lengths in both frequency bands. From the results, it can be seen that a radio-over-fiber system can be designed by choosing a single-mode fiber with the optimized parameter value. The XPM crosstalk keeps increasing with the increase in the length of the fiber and frequency, and PSO was used to counter the crosstalk by optimizing the various fiber parameter values.

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“…[1][2][3] Call for higher speed in mobile communications is inspiring the disposition of new and innovative technologies, which are often associated with radical changes in radiofrequency (RF) signal formats. [1][2][3] Call for higher speed in mobile communications is inspiring the disposition of new and innovative technologies, which are often associated with radical changes in radiofrequency (RF) signal formats.…”

Section: Introductionmentioning

confidence: 99%

“…Due to prosperous and thriving nature of the communication sector, there has been an extraordinary hike in the claim for various high bandwidth applications, high mobility, and all time online connectivity with high data rate transmission by the subscribers. [1][2][3] Call for higher speed in mobile communications is inspiring the disposition of new and innovative technologies, which are often associated with radical changes in radiofrequency (RF) signal formats. Typical drill is to use higher frequency radio spectrum which provides extended bandwidth (eg, millimetre waves) but with low propagation ranges.…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of 60‐GHz wireless optical systems with reverse‐parallel hybrid modulation scheme

Bhatia

Prakash

Saini

2018

Int J Communication

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This paper improves the performance of 60-GHz wireless optical system including radio over fibre (RoF) and radio over free space optics (RoFSO), based on novel reverse-parallel (RP) hybrid modulation scheme. This scheme combines the chromatic dispersion compensation technique of parallel modulation with energy efficiency manipulation technique of reverse modulation.Superior functioning of RoFSO is provided with reverse modulation compared with normal modulation. Comparative investigations are performed by loading 60-GHz RF signal with 2.5 and 10-Gbps data and modulating it with both reverse and hybrid modulators. Hybrid modulation performed better with improved BER of 10 −23 at distance of 51 km for 2.5-Gbps data compared with reverse modulation with BER of 10 −7 .

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Comparative investigations of DWDM transmission system with PMD for different orthogonally modulated signals at 80 Gb/s

Cited by 7 publications

References 30 publications

A modified Fresnel-based algorithm for 3D microwave imaging of metal objects

A modified Fresnel-based algorithm for 3D microwave imaging of metal objects

Performance optimization of radio over fiber system using particle swarm optimization algorithm against cross-phase modulation crosstalk

Performance improvement of 60‐GHz wireless optical systems with reverse‐parallel hybrid modulation scheme

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