Determination Scheme for Detection Thresholds Using Multiple Antennas in Wi-Fi Backscatter Systems

Lee, Wonseok; Kang, Chang-Hee; Moon, Yeon-Kug; Song, Hyoung‐Kyu

doi:10.1109/access.2017.2759806

Cited by 18 publications

(7 citation statements)

References 17 publications

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“…In general, using multiple antennas at the backscatter transmitter to modulate data can significantly improve the BER performance. For example, in [79], by using 8 antennas at the backscatter transmitter, the BER of 10 −5 can be achieved at 50 dB of SNR. However, this may increase the complexity of the backscatter transmitter.…”

Section: F Backscatter Communications Channelsmentioning

confidence: 99%

Ambient Backscatter Communications: A Contemporary Survey

Huynh

Hoang

et al. 2018

IEEE Commun. Surv. Tutorials

708

382

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Recently, ambient backscatter communications has been introduced as a cutting-edge technology which enables smart devices to communicate by utilizing ambient radio frequency (RF) signals without requiring active RF transmission. This technology is especially effective in addressing communication and energy efficiency problems for low-power communications systems such as sensor networks. It is expected to realize numerous Internet-of-Things (IoT) applications. Therefore, this paper aims to provide a contemporary and comprehensive literature review on fundamentals, applications, challenges, and research efforts/progress of ambient backscatter communications. In particular, we first present fundamentals of backscatter communications and briefly review bistatic backscatter communications systems. Then, the general architecture, advantages, and solutions to address existing issues and limitations of ambient backscatter communications systems are discussed. Additionally, emerging applications of ambient backscatter communications are highlighted. Finally, we outline some open issues and future research directions.Index Terms-Ambient backscatter, wireless networks, bistatic backscatter, RFID, wireless energy harvesting, backscatter communications, and passive communications.

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Section: F Backscatter Communications Channelsmentioning

confidence: 99%

Ambient Backscatter Communications: A Contemporary Survey

Huynh

Hoang

et al. 2018

IEEE Commun. Surv. Tutorials

708

382

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“…where γ = α 2 σ 2 12 σ 2 s and δ = σ 2 w + σ 2 14 σ 2 s become independent of the subcarrier index k. Through a few simple manipulations, taking the logarithm of both sides of equation (15)…”

Section: Remark 3: the Functionmentioning

confidence: 99%

Noncoherent Detection for Ambient Backscatter Communications Over OFDM Signals

Darsena

2019

IEEE Access

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Backscattering communications have been recently proposed as an effective enabling technology for massive Internet of Things (IoT) development. A novel application of backscattering, called ambient backscattering (AmBC), has been gaining much attention, wherein backscattering communications exploit existing RF signals without the need for a dedicated transmitter. In such a system, data demodulation process is strongly complicated by the random nature of the illuminating signal, as well as by the presence of the direct-link interference (DLI) from the legacy system. To overcome these shortcomings, one can resort to noncoherent detection strategies, aimed at reducing or even nullifying the amount of a priori information needed to reliably perform signal demodulation. In this paper, we investigate noncoherent detection strategies for backscatter communications over ambient OFDM signals and solve the noncoherent maximumlikelihood (ML) detection problem for a general Q-ary signal constellation. Additionally, we derive a suboptimal detector, which takes the form of the classical energy-detector (ED), whose performance is evaluated in closed-form. Finally, the performance of the proposed detectors is corroborated through Monte Carlo simulations.

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“…More specifically, noncoherent detection is mainly adopted in ambient backscatter communications [17], where the knowledge of channel state information (CSI) at the RN is a challenging task. However, coherent detection may be adopted especially in the bistatic architecture, since the RF sources are most of the time devoted transmitters, that may set no restrictions to communication range and at the same time increase the bit rate [18]. As such, maximum-likelihood (ML) detectors can be applied at the RN so as to detect efficiently the received modulated signal [19].…”

Section: Introductionmentioning

confidence: 99%

Spatial-Modulation-Based Techniques for Backscatter Communication Systems

Goudeli

Psomas

Krikidis

2020

IEEE Internet Things J.

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A vision of digital and connected world is now a global strategy for 5G internet of things (IoT), targeting for high speed communication services with more capacity, lower latency, increased reliability and availability. In this paper, we assess the added value of backscatter communication in 5G IoT technology, by studying spatial modulation-based techniques, applied over a traditional multiple antenna backscatter communication system. Particularly, with backscatter we fulfill the need for wireless self-powered devices, as one of the main characteristics of 5G IoT. Furthermore, with the use of multiple antennas, we apply sophisticated techniques that enhance the overall efficiency of the backscatter communication system. Initially, we study generalized spatial modulation (GSM) and its special case of spatial modulation (SM), exploiting the antenna index as an additional source of information. With this technique, enhanced performance in terms of symbol error rate (SER) and spectral efficiency, is provided. In addition, we expand GSM in time domain, by applying Alamouti coding scheme (GSMA) in two out of the multiple available antennas. In this way, we further enhance the performance and succeed transmit diversity. Finally, analytical expressions regarding the pairwise error probability are derived and presented, while a diversity analysis is carried out for the proposed techniques. Simulation results along with theoretical bounds are provided, validating the enhanced performance of our study.

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Determination Scheme for Detection Thresholds Using Multiple Antennas in Wi-Fi Backscatter Systems

Cited by 18 publications

References 17 publications

Ambient Backscatter Communications: A Contemporary Survey

Ambient Backscatter Communications: A Contemporary Survey

Noncoherent Detection for Ambient Backscatter Communications Over OFDM Signals

Spatial-Modulation-Based Techniques for Backscatter Communication Systems

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