Near-Capacity Network Coding for Cooperative Multi-User Communications

Nguyen, Hung Viet; Ng, Soon Xin; Rebelatto, João Luiz; Li, Yonghui; Hanzo, Lajos

doi:10.1109/vetecf.2011.6093300

Cited by 4 publications

(5 citation statements)

References 20 publications

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“…Moreover, as seen in Fig. 5, the distance of γ = 0.5 dB from the DCMC capacity demonstrated that our 36-component-IrCC based coding arrangement outperforms the corresponding coding arrangement employing a 17-component IrCC code, which operates at a distance of γ = 1.0 dB from the corresponding DCMC capacity, as presented in [1].…”

Section: B Near-capacity Channel Code Designmentioning

confidence: 60%

“…In order to exploit the benefits of the turbo principle, an interleaver (π) is employed for efficiently spreading the extrinsic information in support of the inner iterations occurring between the intrinsically amalgamated URC-MPSK decoder and the IrCC decoder. In contrast to the IrCC-URC-MPSK scheme of [1] employing a 17-component IrCC code, a more powerful IrCC having 36 component codes is used in our system. As a benefit of having the 36-component-IrCC code, the 36-componentIrCC outer code is capable of achieving an improved matching to the EXIT curve of the intrinsically amalgamated inner URC-MPSK coding arrangement.…”

Section: B Near-capacity Channel Codingmentioning

confidence: 99%

“…By apply the two-step principle that was used for 17-component IrCC codes in [1], the near-capacity IrCC-URC-MPSK channel coding scheme employing 36-component IrCC codes is designed. As a result, we obtain the EXIT curves in Fig.…”

Section: B Near-capacity Channel Code Designmentioning

confidence: 99%

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Irregular Convolution and Unity-Rate Coded Network-Coding for Cooperative Multi-User Communications

Nguyen

Hanzo

2013

IEEE Trans. Wireless Commun.

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Abstract-Near-Capacity Multi-user Network-coding (NCMN) based systems operating in multiple modes and relying on an amalgamated Irregular Convolutional Code, a Unity-Rate Code and M-ary Phase-Shift Keying are proposed. We consider a multiuser network in which the users cooperatively transmit their independent information to a common base station (BS). Extrinsic Information Transfer (EXIT) charts were used for designing the proposed NCMN scheme for the sake of approaching the Discrete-input Continuous-output Memoryless Channel's (DCMC) capacity. The NCMN systems are capable of simultaneously exploiting the advantages of all the new modes we designed for our system and those of the conventional mode. The design principles presented in this contribution can be extended to a vast range of NCMN based systems using arbitrary channel coding schemes.

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Section: B Near-capacity Channel Code Designmentioning

confidence: 60%

Section: B Near-capacity Channel Codingmentioning

confidence: 99%

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Irregular Convolution and Unity-Rate Coded Network-Coding for Cooperative Multi-User Communications

Nguyen

Hanzo

2013

IEEE Trans. Wireless Commun.

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“…To approach the capacity, the irregular convolutional code (IrCC) is chosen as it can adjust the shape of its EXIT curve to match that of the SAD-VAMP-SFDE-plus-URCD in turbo equalization. The IrCCs have been widely used in many applications including the near-capacity MMSE turbo equalization [45], [46], cooperative multi-user communications [47], and space-time block code designs [48], [49], etc.…”

Section: B Matching Irregular Recursive Convolutional Codementioning

confidence: 99%

Performance Analysis and Improvement for VAMP Soft Frequency-Domain Equalizers

Tao

et al. 2019

IEEE Access

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The vector approximate message passing (VAMP) soft frequency-domain equalizer (SFDE) has been proposed for turbo equalization. It consists of an inner soft equalizer (ISE) and an inner soft slicer (ISS), which iteratively exchange block-wise extrinsic information to improve the equalization performance, analogous to the outer turbo iteration between a soft equalizer and a soft decoder. However, a comparison of the VAMP-SFDE with other types of self-iterative SFDEs, including the self-iterative block-wise soft interference cancellation (SI-BSIC) SFDE and the generalized approximate message passing (GAMP) SFDE, is lacking. Moreover, comprehensive performance analysis for the VAMP-SFDE is yet to be performed. In this paper, relations among the VAMP-SFDE, the SI-BSIC-SFDE, and the GAMP-SFDE are first revealed. After that, the performance analysis is provided for the VAMP-SFDE and it leads to an improved semi-adaptive damping (SAD) scheme for maintaining the independence between the ISS and ISE. The resulting SAD-VAMP-SFDE shows improved mean square error (MSE) evolution curves compared with the original VAMP-SFDE. The SAD-VAMP-SFDE-based turbo equalization outperforms those using the SI-BSIC-SFDE or GAMP-SFDE and approaches the matched filter bound (MFB) over low signal-to-noise ratio region. To further demonstrate its superiority, the SAD-VAMP-SFDE is employed to enable a near-capacity transceiver design, which adopts the serial concatenation of an irregular convolutional code and a unity-rate code on the transmitter side.INDEX TERMS Frequency-domain turbo equalization, self-iterative soft equalizer (SISE), state evolution, vector approximate message passing (VAMP).

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“…We conducted simulations for characterizing the FER performance versus the Signalto-Noise-Ratio (SNR) and followed the approach of [12] for fitting a polynomial to the FER versus SNR curve. The Forward Error Correction (FEC) scheme employed in our paper is an Irregular Convolutional Coded, Unity-Rate Coded and Quadrature Phase-Shift Keying (IrCC-URC-QPSK) [23,24] scheme. The corresponding FER versus SNR curve was generated with the aid of bit-by-bit simulations.…”

Section: A Fer and Power Allocation In A Single-hop Routementioning

confidence: 99%

Cross-Layer Aided Energy-Efficient Opportunistic Routing in Ad Hoc Networks

Zuo

Dong

Nguyen

et al. 2014

IEEE Trans. Commun.

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Abstract-Most of the nodes in ad hoc networks rely on batteries, which requires energy saving. Hence, numerous energyefficient routing algorithms have been proposed for solving this problem. In this paper, we exploit the benefits of cross-layer information exchange, such as the knowledge of the Frame Error Rate (FER) in the physical layer, the maximum number of retransmissions in the Medium Access Control (MAC) layer and the number of relays in the network layer. Energy-consumptionbased Objective Functions (OF) are invoked for calculating the end-to-end energy consumption of each potentially available route for both Traditional Routing (TR) and for our novel Opportunistic Routing (OR), respectively. We also improve the TR and the OR with the aid of efficient Power Allocation (PA) for further reducing the energy consumption. For the TR, we take into account the dependencies amongst the links of a multi-hop route, which facilitates a more accurate performance evaluation than upon assuming the links that are independent. Moreover, two energy-efficient routing algorithms are designed based on Dijkstra's algorithm. The algorithms based on the energy OF provide the theoretical bounds, which are shown to be close to the bound found from exhaustive search, despite the significantly reduced complexity of the former. Finally, the endto-end throughput and the end-to-end delay of this system are analyzed theoretically and a new technique of characterizing the delay distribution of OR is proposed. The simulation results show that our energy-efficient OR outperforms the TR and that their theoretical analysis accurately matches the simulation results.

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Near-Capacity Network Coding for Cooperative Multi-User Communications

Cited by 4 publications

References 20 publications

Irregular Convolution and Unity-Rate Coded Network-Coding for Cooperative Multi-User Communications

Irregular Convolution and Unity-Rate Coded Network-Coding for Cooperative Multi-User Communications

Performance Analysis and Improvement for VAMP Soft Frequency-Domain Equalizers

Cross-Layer Aided Energy-Efficient Opportunistic Routing in Ad Hoc Networks

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