A green approach to femtocells capacity improvement by recycling wasted resources

Cardoso, Leonardo S.; Maso, Marco; Debbah, Mérouane

doi:10.1109/wcnc.2013.6555183

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…There have been some results on VFDM implementation in a VFDM standalone transceiver pair [15] or a two transmitter -two receiver scenario, where both transmitters are implemented on the same baseband transceiver, called hybrid transceiver [16]. This hybrid transceiver approach for cognitive network deployment was proposed in [17].…”

Section: Implementation Of Vfdm-based Cognitive Radio With Network Comentioning

confidence: 99%

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Network Coding with Multimedia Transmission and Cognitive Networking: An Implementation based on Software-Defined Radio

Tran

Nguyen

Ngo

et al. 2021

REV J. Electron. Commun.

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Network coding (NC) is considered a breakthrough to improve throughput, robustness, and security of wireless networks. Although the theoretical aspects of NC have been extensively investigated, there have been only few experiments with pure NC schematics. This paper presents an implementation of NC in a two-way relay model and extend it to two nonstraightforward scenarios: i) multimedia transmission with layered coding and multiple-description coding; ii) cognitive radio with Vandermode Frequency Division Multiplexing (VFDM). The implementation is in real time and based on Software-Define Radio (SDR). The experimental results show that, by combining NC and source coding, we can control the quality of received multimedia content in an on-demand manner. Whereas in the VFDM-based cognitive radio, the received content in the primary receive is low quality (due to imperfect channel estimation) yet retrievable. Our implementation results serve as a proof for the practical feasibility of network coding in relevant applications.

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Section: Implementation Of Vfdm-based Cognitive Radio With Network Comentioning

confidence: 99%

“…We consider the hybrid transceiver approach [17]. The primary transmitter S and the secondary relay R are implemented on one baseband transceiver.…”

Section: Baseband Designmentioning

confidence: 99%

Network Coding with Multimedia Transmission and Cognitive Networking: An Implementation based on Software-Defined Radio

Tran

Nguyen

Ngo

et al. 2021

REV J. Electron. Commun.

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“…Unfortunately, an analytic optimization of the power sharing strategy between the OFDM and CIA signals is not feasible. The interested reader may refer for further details to [22], where a similar signal model (even though arising from a different approach) characterizes this issue. Thus, numerical iterative approaches are the only viable option to identify suitable values for P M and P C .…”

Section: Power Allocation Strategymentioning

confidence: 99%

The Price of Self-sustainability for Block Transmission Systems

Maso

Lakshminarayana

Quek

et al. 2015

IEEE J. Select. Areas Commun.

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In this work, the self-sustainability of block transmission systems is analyzed. In particular, orthogonal frequency division multiple access (OFDMA) is taken as a reference, due to its popularity and rather simple signal model. More precisely, a generalized variant of this scheme in which the transmitted signal is obtained as the sum of an OFDMA and a cognitive interference alignment (CIA) component, acting as an energy bearer, is considered. In this scenario, the self-sustainability of the transmission is made possible by the flexibility of the adopted strategy and the introduction of a novel energy harvesting OFDMA receiver. Both the feasibility conditions for the self-sustainability and the optimal power allocation to maximize the effectiveness of the energy transfer performed through CIA signal are derived. Numerical results show that a full self-sustainability can be achieved for several system configurations and channel statistics. However, this comes at the cost of a rate penalty w.r.t. a classic OFDMA transmission, which we address as price of self-sustainability. A study of the relationship between the performance of both the energy and the information transfer is carried out. A CP size that minimizes the price of self-sustainability can be found for all the considered configurations.

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“…Interestingly, the adaptivity of the approach described so far can be increased if we depart from the purely parametric approach by means of δ and adopt a flexible and modular structure for the OFDM transmission [27]. From a practical point of view, the level of self-sustainability that can be achieved by means of the proposed approach hinges on the amount of power carried by the CP.…”

Section: A Composite Ofdm Transmissionmentioning

confidence: 99%