Chip-interleaved optical code division multiple access relying on a photon-counting iterative successive interference canceller for free-space optical channels

Zhou, Xiaolin; Zheng, Xiaowei; Zhang, Rong; Hanzo, Lajos

doi:10.1364/oe.21.015926

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…Recently, interest in free-space optical (FSO) communication has increased due to its many outstanding benefits, such as its high data rate, cost-effectiveness, improved security, broad bandwidth solution, and operation in the unlicensed optical spectrum. [1][2][3] FSO communication is typically suited to backhaul applications. 4 FSO communication has many attractive features, but some limitations need attention.…”

Section: Introductionmentioning

confidence: 99%

Performance of orthogonal frequency division multiplexing based M‐ary quadrature amplitude modulation in asymmetrical dual‐hop mixed RF‐FSO transmission system

Hemanth

Sangeetha

Jaiswal

2023

Int J Communication

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Summary This paper investigates the performance of a dual‐hop mixed relay system with radio frequency (RF) and free‐space optics (FSO) communication under the effect of pointing error (PE) and atmospheric turbulence (AT). This paper considers a system where RF and FSO links are cascaded. The RF link is modeled by Nakagami‐m fading, and the FSO link is modeled as gamma–gamma (G‐G) fading channel. Both the channel models use orthogonal frequency division multiplexing (OFDM) with M‐ary quadrature amplitude modulation (QAM). The expressions for probability density function, cumulative distribution function, signal‐to‐noise ratio, and ergodic capacity are derived. The moment generating function (MGF) of fading and the bit error rate (BER) of the OFDM‐based M‐ary QAM scheme is derived in terms of Meijer's G‐function. It has been observed that, in fixed gain relay systems, the modulation scheme's BER is dominated by the SNR of the RF link. While in a variable gain relay system, the turbulence conditions of the FSO system affect the SNR and the BER of the modulation method. The feasibility of heterodyne detection and intensity modulation direct detection (IM/DD) is analyzed in terms of outage probability and ergodic capacity. The results can be used to choose the optimal modulation order and relay system for QAM‐OFDM‐based optical wireless systems.

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Section: Introductionmentioning

confidence: 99%

Performance of orthogonal frequency division multiplexing based M‐ary quadrature amplitude modulation in asymmetrical dual‐hop mixed RF‐FSO transmission system

Hemanth

Sangeetha

Jaiswal

2023

Int J Communication

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“…In molecular and nano communications, information is delivered by conveying encoded particles from the source to destination [7], [8]. Similarly, in optical communications, information is delivered by photons having information-dependent intensities, which may be detected by a photon-counting process [9], [10]. Given the nature of the process, the system is capable of providing a heating/illumination/propulsion function.…”

Section: Introductionmentioning

confidence: 99%

Generalised Precoded Spatial Modulation for Integrated Wireless Information and Power Transfer

Zhang,

Yang,

Hanzo

2017

Preprint

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“…Free space optical (FSO) communication has attracted increasing research interests as a benefit of its high data rate, enhanced security achieved in the unlicensed optical electro-magnetic spectrum and its moderate deployment cost [1]- [3]. It is suitable for a wide range of applications, such as enterprise/building connectivity, the back-haul of cellular systems, redundant backup links and disaster recovery [2].…”

Section: Introductionmentioning

confidence: 99%

Performance of a Free-Space-Optical Relay-Assisted Hybrid RF/FSO System in Generalized <inline-formula> <tex-math notation="LaTeX">$M$</tex-math> </inline-formula>-Distributed Channels

Kong

Hanzo

et al. 2015

IEEE Photonics J.

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This paper investigates the average symbol error rate (ASER) performance of a dualhop hybrid relaying system relying on both radio frequency (RF) and free space optical (FSO) links. Specifically, the RF link is used for supporting mobile communication, while the FSO link is adopted as the backhaul of the cellular infrastructure. Considering non-line-of-sight (NLoS) RF transmissions and a generalized atmospheric turbulence (AT) channel, the associated statistical features constituted of both the exact and the asymptotic moment generating functions (MGF) are derived in closed form. They are then used for calculating the ASER of M-ary phase shift keying (PSK), differentially encoded non-coherent PSK (DPSK) and non-coherent frequency-shift keying (FSK). A range of additional asymptotic expressions are also derived for all the modulation schemes under high signal-to-noise ratios (SNR). It is observed from the asymptotic analysis that the ASERs of all the modulation schemes are dominated by the average SNR of the RF link in the hybrid relaying system using a fixed relay gain, while in the relaying system using a dynamic channel dependent relay gain, the ASERs of all the modulation schemes depend both on the average SNR and on the AT condition of the FSO path. We also find that the fixed-gain relaying strategy achieves twice the diversity order of the channeldependent relaying strategy albeit at the cost of requiring a high power amplifier (PA) dynamic range at the relay node. Furthermore, by comparing the asymptotic ASERs, we calculate the SNR differences between the different modulation schemes in both the fixed-gain and the channel-dependent relaying system. Finally, simulation results are presented for confirming the accuracy of our expressions and observations. Index Terms: Relay, atmospheric turbulence, free space optical communications, symbol error rate, hybrid RF/FSO. IEEE Photonics JournalPerformance of a Free Space Optical inhomogeneities in the temperature and pressure of the atmosphere [4]. A number of studies have characterized the effects of AT on the attainable FSO system performance, which adopted sophisticated techniques for mitigating the performance degradation imposed by [5][6][7][8]. In [5], the average capacity of FSO systems was investigated under both weak and strong turbulence conditions, while in [6], both the bit error rate (BER) performance as well as the channel capacity were analyzed for optical code-division multiple-access (OCDMA) systems. Spatial diversity reception was investigated in [7] with the aid of both maximum-likelihood detection and maximum-likelihood sequence detection for overcoming the turbulence-induced fading. In [8], the BER performance was characterized as a function of the diversity gain in a multiple-input multiple-output (MIMO) FSO system. Relaying techniques have been widely used for exploiting the resultant diversity gain and for mitigating channel fading in traditional radio frequency (RF) systems [9], [10]. By contrast, in FSO systems, relaying has also been invo...

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Chip-interleaved optical code division multiple access relying on a photon-counting iterative successive interference canceller for free-space optical channels

Cited by 14 publications

References 20 publications

Performance of orthogonal frequency division multiplexing based M‐ary quadrature amplitude modulation in asymmetrical dual‐hop mixed RF‐FSO transmission system

Performance of orthogonal frequency division multiplexing based M‐ary quadrature amplitude modulation in asymmetrical dual‐hop mixed RF‐FSO transmission system

Generalised Precoded Spatial Modulation for Integrated Wireless Information and Power Transfer

Performance of a Free-Space-Optical Relay-Assisted Hybrid RF/FSO System in Generalized <inline-formula> <tex-math notation="LaTeX">$M$</tex-math> </inline-formula>-Distributed Channels

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