Analysis the performance of a LDPC coded FSO system with Q-ary pulse-position modulation

Barua, Bobby; Barua, Dalia

doi:10.1109/iccrd.2011.5764032

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…It was observed that the LDPC coded MIMO FSO system using M-PPM provides better performance over the uncoded system in case of a strong atmospheric turbulence and large background noise set to -170 dBJ. A coding gain of 10 -20 dB was observed over the uncoded system at BER = 10 −12 [321], [322]. A comparison of serial concatenated PPM is made with LDPC coded PPM which shows low latency and improved performance for LDPC coded PPM in space-based optical links [323].…”

Section: •-Ppm Dppm Dappm Dpim Dhpimαmentioning

confidence: 99%

“…It was observed that LDPC coded MIMO FSO system using M-PPM provides better performance over uncoded system in case of strong atmospheric turbulence and large background noise set to -170 dBJ. A coding gain of 10-20 dB was observed over uncoded system at BER = 10 −12 [192], [193]. Also, bit interleaved coded modulation (BICM) scheme proposed by I.B Djordjevic [192] provide excellent coding gain when used with LDPC coded FSO system.…”

Section: Table VI Comparison Of Variants Of Ppm Modulation Schemementioning

confidence: 99%

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Optical Communication in Space: Challenges and Mitigation Techniques

Kaushal

Kaddoum

2017

IEEE Commun. Surv. Tutorials

1,353

721

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Abstract-In recent years, free space optical (FSO) communication has gained significant importance owing to its unique features: large bandwidth, license free spectrum, high data rate, easy and quick deployability, less power and low mass requirements. FSO communication uses optical carrier in the near infrared (IR) band to establish either terrestrial links within the Earth's atmosphere or inter-satellite/deep space links or ground-to-satellite/satellite-to-ground links. It also finds its applications in remote sensing, radio astronomy, military, disaster recovery, last mile access, backhaul for wireless cellular networks and many more. However, despite of great potential of FSO communication, its performance is limited by the adverse effects (viz., absorption, scattering and turbulence) of the atmospheric channel. Out of these three effects, the atmospheric turbulence is a major challenge that may lead to serious degradation in the bit error rate (BER) performance of the system and make the communication link infeasible. This paper presents a comprehensive survey on various challenges faced by FSO communication system for ground-to-satellite/satellite-to-ground and inter-satellite links. It also provide details of various performance mitigation techniques in order to have high link availability and reliability. The first part of the paper will focus on various types of impairments that pose a serious challenge to the performance of optical communication system for ground-to-satellite/satellite-to-ground and inter-satellite links. The latter part of the paper will provide the reader with an exhaustive review of various techniques both at physical layer as well as at the other layers (link, network or transport layer) to combat the adverse effects of the atmosphere. It also uniquely presents a recently developed technique using orbital angular momentum for utilizing the high capacity advantage of optical carrier in case of space-based and near-Earth optical communication links. This survey provides the reader with comprehensive details on the use of space-based optical backhaul links in order to provide high capacity and low cost backhaul solutions.

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Section: •-Ppm Dppm Dappm Dpim Dhpimαmentioning

confidence: 99%

Section: Table VI Comparison Of Variants Of Ppm Modulation Schemementioning

confidence: 99%

Optical Communication in Space: Challenges and Mitigation Techniques

Kaushal

Kaddoum

2017

IEEE Commun. Surv. Tutorials

1,353

721

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“…3 FSO transmission provides high-speed connections for disaster recovery and temporal networks. However, for many scenarios such as real-time transmission and broadcasting, retransmission is either expensive or impossible to implement, so using forward error correction (FEC) is promising and has been widely studied [2][3] [4]. Recent reviews [5] and [6] give an overview of coding methods for optical transmission.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, adaptation methods and transmission protocols are being actively discussed [11–13]. For many scenarios such as real‐time transmission and broadcasting, retransmission is either expensive or impossible to implement, so using forward error correction (FEC) is promising and has been widely studied [14–16].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of packet layer FEC codes and interleaving in FSO channels

et al. 2017

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The combination of forward-error-correction (FEC) and interleaving can be used to improve free-space optical (FSO) communication systems. Recent research has optimized the codeword length and interleaving depth under the assumption of a fixed buffering size, however, how the buffering size influences the system performance remains unsolved. This paper models the system performance as a function of buffering size and FEC recovery threshold, which allows system designers to determine optimum parameters in consideration of the overhead. The modelling is based on statistics of temporal features of correct data reception and burst error length through the measurement of the channel good time and outage time. The experimental results show good coherence with the theoretical values. This method can also be applied in other channels if a Continuous-Time-Markov-Chain (CTMC) model of the channel can be derived.

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“…Furthermore, an optical concatenated coding scheme combined RS and STBC is proposed in [5]. The performance of LDPC [6.7] is better than RS, so a concatenated system based on LDPC code and STBC is proposed in [8,9]. This scheme achieves not only diversity gain but also coding gain, thus achieving a much better link performance.…”

Section: Introductionmentioning

confidence: 99%

A novel concatenated coding scheme combined LDPC and VBLAST for FSO links

Wang

Fen

Cao

2015

2015 IEEE International Conference on Communication Software and Networks (ICCSN)

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We propose a novel concatenated coding scheme combined Low Density Parity Check(LDPC) code and vertical Bell Labs layered space-time (VBLAST) code to improve the bit error rate (BER) performance for Free-space optical (FSO) communication links with On Off Keying(OOK) modulation. In the scheme, -rotation encoding and beliefpropagation (BP) decoding algorithm are employed in LDPC code, and minimum mean-square error (MMSE) soft-decision decoding algorithm is used for VBLAST code. Moreover, a joint iterative detection and decoding algorithm of VBLAST code and LDPC code is used to improve the overall link performance. At last, the BER of the proposed scheme over lognormal atmospheric turbulent fading channels is analyzed by using Monte Carlo method. The result shows that the BER of the proposed concatenated coding scheme is much improved than that only use VBLAST code scheme.

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Analysis the performance of a LDPC coded FSO system with Q-ary pulse-position modulation

Cited by 7 publications

References 10 publications

Optical Communication in Space: Challenges and Mitigation Techniques

Optical Communication in Space: Challenges and Mitigation Techniques

Performance analysis of packet layer FEC codes and interleaving in FSO channels

A novel concatenated coding scheme combined LDPC and VBLAST for FSO links

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