Network‐coded multiple‐source cooperation aided relaying for free‐space optical transmission

Zhou, Xiaolin; Zhang, Dingchen; Yang, Yandong; Obaidat, Mohammad S.

doi:10.1002/dac.2450

Cited by 20 publications

(19 citation statements)

References 25 publications

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“…According to (13) and (14), the destination decodes the sources' information and obtains the estimatesx 1 ;x 2 by using ML.…”

Section: Canc-af Relay Protocolmentioning

confidence: 99%

“…They introduced some multicast mechanisms for optimization and proved that linear network coding can achieve the maximum value of each data flow. Although network coding was developed for wireline relay networks [10,11], it can also be applied to wireless networks due to the broadcast nature of the wireless medium [12,13]. Under the assumption of bit-level synchronization, physical layer network coding (PNC), which is a novel form of network coding, was discussed in [14] and [15].…”

Section: Introductionmentioning

confidence: 99%

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Cooperative quadrature physical layer network coding in wireless relay networks

Yang

Chong

Meng

et al. 2013

Int J Communication

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SUMMARYThis paper proposes a cooperative quadrature physical layer network coding (CQPNC) scheme for a dual-hop cooperative relay network, which consists of two source nodes, one relay node and one destination node. All nodes in the network have one antenna, and the two source nodes transmit their signals modulated with quadrature carriers. In this paper, a cooperative quadrature physical layer network coded decode-andforward (DF) relay protocol (CQPNC-DF) is proposed to transmit the composite information from the two source nodes via the relay node to the destination node simultaneously to reduce the number of time slots required for a transmission. The proposed CQPNC-DF relay protocol is compared with time-division multiple-access amplify-and-forward (TDMA-AF), TDMA-DF, cooperative network coded DF (CNC-DF) and cooperative analog network coded AF (CANC-AF) relay protocols to demonstrate its effectiveness in terms of bit error rate (BER) and system throughput under different propagation conditions. The simulation results reveal that the proposed CQPNC-DF relay protocol can significantly improve the network performance. Compared with two TDMA schemes and CNC-DF, the proposal can provide up to 100% and 50% throughput gains, respectively. Moreover, no matter what the scene, the proposed scheme always has the lowest BER in the low SNR region.

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“…According to (13) and (14), the destination decodes the sources' information and obtains the estimatesx 1 ;x 2 by using ML.…”

Section: Canc-af Relay Protocolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cooperative quadrature physical layer network coding in wireless relay networks

Yang

Chong

Meng

et al. 2013

Int J Communication

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“…This has been extensively studied in the context of optical multicast networks [9,10]. To mitigate the strong turbulence-induced fading, a cooperative relaying aided FSO transmission network based on NC and using an iterative multiple source detection scheme in conjunction with a chip-level soft network decoding at the relay and the destination node was proposed in [11]. The simulation results demonstrated that the proposed method was capable of approaching the single user bound for transmission over the gamma-gamma turbulence channel.…”

Section: Introductionmentioning

confidence: 99%

Investigation on iterative multiuser detection physical layer network coding in two-way relay free-space optical links with turbulences and pointing errors

Abu-Almaalie¹,

Ghassemlooy²,

Bhatnagar³

et al. 2016

Appl. Opt.

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Physical layer network coding (PNC) improves the throughput in wireless networks by enabling two nodes to exchange information using a minimum number of time slots. The PNC technique is proposed for two-way relay channel free space optical (TWR-FSO) communications with the aim of maximizing the utilization of network resources. The multipair TWR-FSO is considered in this paper, where a single antenna on each pair seeks to communicate via a common receiver aperture at the relay. Therefore, chip-interleaving is adopted as a technique to separate the different transmitted signals at the relay node to perform PNC mapping. Accordingly, this scheme relies on the iterative multiuser technique for detection of users at the receiver. The bit error rate (BER) performance of the proposed system is examined under the combined influences of atmospheric loss, turbulence-induced channel fading and the pointing errors (PEs). By adopting the joint PNC mapping with interleaving and multiuser detection techniques, the BER results show that the proposed scheme can achieve a significant performance improvement against the degrading effects of turbulences and PEs. It is also demonstrated that a larger number of simultaneous users can be supported with this new scheme in establishing a communication link between multiple pairs of nodes in two time slots, thereby improving the channel capacity.

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“…LEDs also have the advantage that their light output can be modulated with high-frequency signals. Besides indoor wireless communications, VLC technology can be applied to other applications such as the VLC between a traffic light and a vehicle [16] or outdoor wireless optical communications also called free-space optical communication [17][18][19]. VLC has gained much attention as a strong candidate for future indoor wireless communication because of several advantages including its unregulated huge bandwidth (nearly 400 THz) and not causing electromagnetic interference [15].…”

Section: Introductionmentioning

confidence: 99%

Half‐duplex visible light communication using an LED as both a transmitter and a receiver

Kim

Lee

2015

Int J Communication

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In typical visible light communication (VLC) systems, light-emitting diodes (LEDs) are used as optical transmitters and photodiodes are used as optical receivers. Currently, many communication devices such as smart phones have a built-in LED lamp whereas they usually do not have a built-in photodiode. If we find a way to receive VLC signals without the need to add an additional photodiode on the communication devices, it will contribute to the spread of VLC. Therefore, we propose and demonstrate a VLC scheme without the need for a photodiode. As the first step, we investigate the characteristics of an LED as a VLC receiver and find out that an LED can also be used as a VLC receiver in certain conditions. Then, we demonstrate a half-duplex VLC system using an LED as both an optical transmitter and an optical receiver, without the need for a photodiode. This technique could be used in various applications such as the VLC between smart phones with a built-in LED lamp and the VLC between LED traffic lights.

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Network‐coded multiple‐source cooperation aided relaying for free‐space optical transmission

Cited by 20 publications

References 25 publications

Cooperative quadrature physical layer network coding in wireless relay networks

Cooperative quadrature physical layer network coding in wireless relay networks

Investigation on iterative multiuser detection physical layer network coding in two-way relay free-space optical links with turbulences and pointing errors

Half‐duplex visible light communication using an LED as both a transmitter and a receiver

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