Square Root Module to Combat Dispersion-Induced Nonlinear Distortion in Radio-Over-Fiber Systems

Prat, Josep; Santos, Maria C.; Omella, M.

doi:10.1109/lpt.2006.881662

Cited by 22 publications

(14 citation statements)

References 4 publications

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“…In terms of the field, the signal is modulated in intensity although it is desirable to have it modulated in field amplitude. Because of that, in analogue SCM, the optimum results with the SQRT are obtained when a real amplitude modulation (AM) is applied instead of intensity modulation (IM) as it is explained in Prat et al (2006).…”

Section: Monte Carlo Error Count Ber Analysis With Only Ase Noisementioning

confidence: 99%

“…In Prat et al (2005Prat et al ( , 2006Prat et al ( , 2007 radio over fibre (RoF) experiments have been carried out by using an electrical module that approximates the SQRT response. With the SQRT in a RoF system, the transmitted distance is considerably increased, to have the same levels of second, and third harmonics respectively, as compared with the case of no equalization.…”

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confidence: 99%

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Non-linear function for a Gaussian photo-reception in standard IM/DD systems

et al. 2010

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In this paper, a set of mathematical transformations is developed to obtain the nonlinear function that recovers the Gaussian statistics after the square law distortion produced by the photodetector in Intensity Modulated/ Direct Detected IM/DD systems. Linear impairments in the optical domain like the Amplified Spontaneous Emission (ASE) or the Rayleigh Backscattering (RB) noise are considered the predominant. Here for the first time, a mathematical non-linear function is obtained without assuming any predefined function form. The result is that the noise distribution can be considered more signal-independent Gaussian after this non-linear transformation, than by using any other previously published operation. Applying this function in post-detection enables to make the system more linear, and then would improve the performance of the conventional electronic equalizers (EE). When using Maximum Likelihood Sequence Estimators (MLSE), a simplified metric can be used. Since the channel transfer function can be easily reproduced, computational cost and complexity are reduced.

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Section: Monte Carlo Error Count Ber Analysis With Only Ase Noisementioning

confidence: 99%

mentioning

confidence: 99%

Non-linear function for a Gaussian photo-reception in standard IM/DD systems

et al. 2010

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“…A linear distortion such as chromatic dispersion in optical field is converted into nonlinear distortion after square-law detection at the receiver, which reduce the effectiveness of linear equalization [9]. The square root module (SRM) device, added after photodiode to compensate for square-law behavior, improves linear equalizer performance and thus makes it chromatic dispersion resilient [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optical power budget enhancement in next-generation DDO-OFDM-based optical access networks using square root module

Kumar

Srivastava

2015

Photon Netw Commun

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A passive optical network based on orthogonal frequency division multiplexing (OFDM-PON) gives improved performance for high speed optical access network due to its greater resistance to fiber dispersion and higher bandwidth efficiency. In optical fiber communication, chromatic dispersion (CD) is a linear distortion in fiber, but it is converted into nonlinear distortion due to square-law characteristic of photo diode detector at the receiver side resulting in degradation of performance. To compensate for this nonlinear distortion, we proposed to use a linearized receiver circuit with square root module (SRM) device which can improve the performance of system in terms of CD tolerance. In this paper, we have analytically analyzed the performance of OFDM-PON system with and without SRM device for direct-detection optical OFDM-PON (DDO-OFDM-PON) system. At BER of 10 −3 , which is the limit of forward error correction, there is 11.1 and 13.5 dB improvement in optical budget with SRM for downstream and upstream direction, respectively, as compared to conventional DDO-OFDM-PON system.

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“…Radio-over-fiber (ROF) transport systems have the potential to offer large transmission capacity, significant mobility and flexibility, as well as economic advantage due to its broad bandwidth and low attenuation characteristics [1][2][3][4]. The design of microwave signal generation plays an important role for the successful deployment in fullduplex ROF transport systems.…”

Section: Introductionmentioning

confidence: 99%

Radio-Over-Fiber Transport Systems Based on DFB Ld With Main and -1 Side Modes Injection-Locked Technique

Li²,

Lee³

et al. 2009

PIER Letters

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Abstract-Full-duplex radio-over-fiber (ROF) transport systems based on distributed feedback laser diode (DFB LD) with main and −1 side modes injection-locked technique is proposed and demonstrated. Improved performances of bit error rate (BER) over a-40 km singlemode fiber (SMF) transmission for down-link, and over an-80 km SMF transmission for up-link were achieved. The characteristic of our proposed systems is the use of one DFB LD with main and −1 side modes injection-locked technique, it reveals a prominent alternative with better performances.

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Square Root Module to Combat Dispersion-Induced Nonlinear Distortion in Radio-Over-Fiber Systems

Cited by 22 publications

References 4 publications

Non-linear function for a Gaussian photo-reception in standard IM/DD systems

Non-linear function for a Gaussian photo-reception in standard IM/DD systems

Optical power budget enhancement in next-generation DDO-OFDM-based optical access networks using square root module

Radio-Over-Fiber Transport Systems Based on DFB Ld With Main and -1 Side Modes Injection-Locked Technique

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