Performance of M-PAM FSO communication systems in atmospheric turbulence based on APD detector

Yao, Haifeng; Ni, Xiaolong; Chen, Chun-Yi; Li, Bo; Zhang, Xinmeng; Liu, Yi; Tong, Shoufeng; Liu, Zhi; Jiang, Huilin

doi:10.1364/oe.26.023819

Cited by 37 publications

(9 citation statements)

References 19 publications

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“…to reduces equation (12) to close form expression, we will use Gauss Hermite Quadrature approximation stated in [24], which is stated as…”

Section: A Log-normal Shadowingmentioning

confidence: 99%

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Moment-Based Analysis of Reg. Triangular QAM in Turbulent Atmospheric Channels with Pointing Errors incorporates Zero and Non-zero Boresight

Shahid¹,

Qureshi²,

Sheikh³

et al. 2020

Preprint

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In recent years, free-space optical (FSO) technology has gained fame in communication systems due to its high data rates and license-free feature. Triangular quadrature amplitude modulation (TQAM) is an efficient modulation scheme that uses even bits per symbol, and it has a low average symbol error rate (ASER) than square quadrature amplitude modulation (SQAM). In this paper, we theoretically investigate the performance of subcarrier triangular quadrature amplitude modulation (SC-TQAM) corrupted by atmospheric turbulence in the presence of pointing errors (P.E) in FSO communications. We have considered boresight displacement, P.E effect, and atmospheric turbulence. To represent the atmospheric turbulence we consider Log-normal, Rayleigh and Rician distributions which exhibit weak, moderate and strong weather effects. The P.E is employed using Rayleigh and Rician distribution that incorporates zero and non-zero boresight displacement respectively. The moment generating functions of these models have been derived. P.E is modeled using an optical beam radius and receiver aperture radius. The combination of these parameters will help enhance the average symbol error rate (ASER). Furthermore, we have derived an analytical expression that is used to develop numerical results. The ASER performance is observed against average received irradiance, optical beam radius, P.E standard deviation and receiver aperture radius. In the end, the ASER performance is evaluated against SNR and Monte Carlo simulations are performed which validates the theoretical results.

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“…to reduces equation (12) to close form expression, we will use Gauss Hermite Quadrature approximation stated in [24], which is stated as…”

Section: A Log-normal Shadowingmentioning

confidence: 99%

“…Multiple phase-shift keying (MPSK) and multiple pulse amplitude modulation (MPAM) gives better performance then OOK [12,13].…”

Section: Introductionmentioning

confidence: 99%

Moment-Based Analysis of Reg. Triangular QAM in Turbulent Atmospheric Channels with Pointing Errors incorporates Zero and Non-zero Boresight

Shahid¹,

Qureshi²,

Sheikh³

et al. 2020

Preprint

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“…performance under the same signal-noise ratio (SNR). In addition, MPSK can achieve the high-speed data transmission with 50 GHz channel spacing for improving high spectral utilization efficiency by using wavelength division multiplexing (WDM) system [3]- [6].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of MPSK FSO Communication Based on the Balanced Detector in a Fiber-Coupling System

Yao

Chen

et al. 2019

IEEE Access

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An average bit error ratio (ABER) performance model for multiple phase shift keying (MPSK) based on a balanced detector with a fiber is presented in the free-space link for the first time. The Johnson S B probability distribution function (pdf), to the best of our knowledge, is first experimentally explored, which can be used to describe the fading characteristics of an optical signal coupled into a single-mode fiber (SMF) in an atmospheric turbulence channel. Subsequently, an ABER expression is established by combining the photon characteristics of the balanced detector with the fiber. The numerical results show that the system has the most superior ABER performance when the splitting ratio is 0.5 and the quantum efficiency of the two photodetectors is equal. Moreover, the communication performances can be optimized by adjusting parameters, such as increasing the system bandwidth, selecting the appropriate modulation order, and improving the received optical power. Finally, the MPSK-signal-to-noise-ratio (SNR) model is also studied to evaluate system communication performance. Through our asymptotic analysis, if the required ABER falls below the 7% forward error correction (FEC) limit of 3.8 × 10 −3 , the SNR should maintain at least 38 dB or more, while the normalized fluctuation variance deteriorates to 5.2441. This paper provides a parameter reference for designing the MPSK free-space optical (FSO) communication system, especially the fiber-coupling receiver.

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“…However, PAM is greatly affected by the intensity of turbulence and it is more suitable for weak turbulence conditions. 25 In particular, the pulse position modulation (PPM) method is more resistant to noise than the OOK method and does not cause a problem of threshold setting, so that it can be applied in various ways. [26][27][28] Thus, the PPM scheme allows easy implementation for receiver, since it is not a trivial job to determine the optimal value for the threshold.…”

Section: Introductionmentioning

confidence: 99%

Underwater laser communication with sloped pulse modulation in turbid water

Kang

Kim

et al. 2019

International Journal of Distributed Sensor Networks

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In this article, we propose the demonstration of an underwater wireless laser communication link operating at data rates of up to 100 Mbps over a band-limited turbid water channel using a modified pulse position modulation scheme with a sloped pulse. The communication link uses an avalanche photodiode module as the receiver. The bit error rate of a 5.4 3 10 26 by 450-nm blue laser diode in turbid water with 1.4 Nephelometric Turbidity Unit was below the forward error correction limit. Our demonstrated underwater wireless laser communication system is simple to use and maintains a high data transmission rate.

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Performance of M-PAM FSO communication systems in atmospheric turbulence based on APD detector

Cited by 37 publications

References 19 publications

Moment-Based Analysis of Reg. Triangular QAM in Turbulent Atmospheric Channels with Pointing Errors incorporates Zero and Non-zero Boresight

Moment-Based Analysis of Reg. Triangular QAM in Turbulent Atmospheric Channels with Pointing Errors incorporates Zero and Non-zero Boresight

Performance Analysis of MPSK FSO Communication Based on the Balanced Detector in a Fiber-Coupling System

Underwater laser communication with sloped pulse modulation in turbid water

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