Optimal Detection for Ambient Backscatter Communication Systems With Multiantenna Reader Under Complex Gaussian Illuminator

Tao, Qin; Zhong, Caijun; Chen, Xiaoming; Lin, Hai; Zhang, Zhaoyang

doi:10.1109/jiot.2020.2997954

Cited by 16 publications

(22 citation statements)

References 31 publications

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“…A 4PSK-AB hardware prototype that gives a data rate of 20 kb/s was developed to integrate the 4PSK-modulated transmitter, multilevel detector, and energy harvester. Recently, the issue of symbol detection in ABCS with the multi-antenna reader was addressed [ 222 ]. Leveraging the ON-OFF keying modulation, the optimal detector, which can avoid the error floor phenomenon, was devised.…”

Section: Enabling Technologies and Challenges For 6gmentioning

confidence: 99%

6G Enabled Smart Infrastructure for Sustainable Society: Opportunities, Challenges, and Research Roadmap

Imoize

Adedeji

Tandiya

et al. 2021

Sensors

178

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The 5G wireless communication network is currently faced with the challenge of limited data speed exacerbated by the proliferation of billions of data-intensive applications. To address this problem, researchers are developing cutting-edge technologies for the envisioned 6G wireless communication standards to satisfy the escalating wireless services demands. Though some of the candidate technologies in the 5G standards will apply to 6G wireless networks, key disruptive technologies that will guarantee the desired quality of physical experience to achieve ubiquitous wireless connectivity are expected in 6G. This article first provides a foundational background on the evolution of different wireless communication standards to have a proper insight into the vision and requirements of 6G. Second, we provide a panoramic view of the enabling technologies proposed to facilitate 6G and introduce emerging 6G applications such as multi-sensory–extended reality, digital replica, and more. Next, the technology-driven challenges, social, psychological, health and commercialization issues posed to actualizing 6G, and the probable solutions to tackle these challenges are discussed extensively. Additionally, we present new use cases of the 6G technology in agriculture, education, media and entertainment, logistics and transportation, and tourism. Furthermore, we discuss the multi-faceted communication capabilities of 6G that will contribute significantly to global sustainability and how 6G will bring about a dramatic change in the business arena. Finally, we highlight the research trends, open research issues, and key take-away lessons for future research exploration in 6G wireless communication.

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Section: Enabling Technologies and Challenges For 6gmentioning

confidence: 99%

6G Enabled Smart Infrastructure for Sustainable Society: Opportunities, Challenges, and Research Roadmap

Imoize

Adedeji

Tandiya

et al. 2021

Sensors

178

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“…For backscatter device adopting the most commonly OOK modulation or differential BPSK modulation, the received signal strength varies as BD switches the signal state. Based on this, non-coherent receivers are implemented by energy detector and maximum likelihood receiver to average out the fast varying phases and compare the energy levels between two signal states [2], [3], [6], [8], [10], [12]- [17]. In these systems, DPI is mitigated by considering the AmBC system working under orthogonal frequency division multiplexing (OFDM) ambient signal and BD shifts the frequency of ambient signal [4], [18], or by designing specific training sequence [17].…”

Section: A Related Workmentioning

confidence: 99%

“…Existing approaches that boost detection performance via addressing DPI and unknown ambient signal include exploiting frequency [3], [4], spatial [5]- [8] or phase [9] differences between two paths, and using complex signal processing techniques [10]. Among these solutions, receiver with multiple antennas that exploits spatial difference has attracted much attention in AmBC researches.…”

Section: Introductionmentioning

confidence: 99%

“…Available works on multi-antenna AmBC receivers mostly consider systems where the BD performs on-off-keying (OOK) modulation. An optimum multi-antenna receiver for OOK-modulated backscatter signal is derived in [8]. Though OOK is the most commonly adopted modulation on a BD, its demodulator loses a certain SNR gain with respect to bit-error-rate (BER)-performance compared with other binary demodulators.…”

Section: Introductionmentioning

confidence: 99%

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Optimum Multi-Antenna Ambient Backscatter Receiver for General Binary-Modulated Signal

Wang,

Yiğitler,

Jäntti

2020

Preprint

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Ambient backscatter communication (AmBC) is becoming increasingly popular for enabling green communication amidst the continual development of the Internet-of-things paradigm. Efforts have been put into backscatter signal detection as the detection performance is limited by the low signal-tointerference-plus-noise ratio (SINR) of the signal at the receiver. The low SINR can be improved by adopting a multi-antenna receiver. In this paper, the optimum multi-antenna receiver that does not impose any constraints on the types of binary modulation performed by the backscatter device and the waveform used by the ambient source system is studied. The proposed receiver owns a simple structure formed by two beamformers. Bit error rate (BER) performances of the optimum receiver are derived under constant-power ambient signal and Gaussian-distributed ambient signal. Moreover, to facilitate the implementation of the optimum receiver, a simplified receiver is proposed and practical approximations to required beamformers are provided. The derived optimum receiver avoids the complex direct path interference cancellation and coherent reception, but exploits the fact that backscatter signal changes the composite channel impinging at the receiver and the directivity of receiver antenna array. Comparative simulation results show that the performance of the optimum receiver achieves the same performance as the coherent receiver even though it realizes non-coherent reception. The studied receivers provide high flexibility for implementing simple and low-cost receivers in different AmBC systems.

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“…The work [7] studies the multi-antenna receiver for the BPSK-modulated backscatter signal with Gaussian ambient signal. The recent work [4] derives the optimum receiver for any binary-modulated BD signal, which is a generalization of the existing receivers in [7], and [3], [9] which consider the OOK-modulated BD signal and Gaussian ambient signal. The work [4] extends the receiver design when no prior information about ambient signal is available.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Multi-Antenna Receiver for General Binary-Modulated Ambient Backscatter Signal

Wang

Ali

Jäntti

2021

2021 IEEE Global Communications Conference (GLOBECOM)

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Multi-antenna receivers are becoming popular in ambient backscatter communication (AmBC) because they help to improve the detection performance by improving the signalto-interference-plus-noise ratio (SINR) of the backscatter signal. Recent solutions, however, suffer from high implementation complexity and they tend to require the receiver to have high dynamic range. In this paper, a simplified receiver is proposed, which is able to overcome the above limitations. The receivers for the deterministic-unknown ambient signal and the Gaussian signal are derived using maximum-a-posteriori (MAP) criterion. Then, their detection performances are derived for bit-error-rate analysis. It is shown that the test statistic of the receiver is independent of the ambient signal type. The components for implementation are halved compared with the optimum AmBC receiver at the cost of an SINR penalty as low as 1-dB to achieve the same detection performance for the deterministic ambient signal and 3.6-dB for the Gaussian ambient signal. The dynamic range problem can be mitigated by implementing it fully in the analog domain. By providing attractive practical advantages mentioned above, the proposed simplified receiver, therefore, enables cost-effective AmBC receiver implementations.

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Optimal Detection for Ambient Backscatter Communication Systems With Multiantenna Reader Under Complex Gaussian Illuminator

Cited by 16 publications

References 31 publications

6G Enabled Smart Infrastructure for Sustainable Society: Opportunities, Challenges, and Research Roadmap

6G Enabled Smart Infrastructure for Sustainable Society: Opportunities, Challenges, and Research Roadmap

Optimum Multi-Antenna Ambient Backscatter Receiver for General Binary-Modulated Signal

A Simplified Multi-Antenna Receiver for General Binary-Modulated Ambient Backscatter Signal

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