Signal Detection Scheme in Ambient Backscatter System With Multiple Antennas

Kang, Chang-Hee; Lee, Wonseok; You, Young-Hwan; Song, Hyoung‐Kyu

doi:10.1109/access.2017.2732948

Cited by 35 publications

(21 citation statements)

References 9 publications

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“…, N ), as described in Section II. The last step, consists in detecting and demodulating the data transmitted bits, by first estimating the pattern indexî(l) according to (4) and then applying a simple demapping according to table II. Fig.…”

Section: Matlab Warp Boardmentioning

confidence: 99%

See 1 more Smart Citation

First Experimental Ambient Backscatter Communication Using a Compact Reconfigurable Tag Antenna

Kokar

Phan-Huy

Fara

et al. 2019

2019 IEEE Globecom Workshops (GC Wkshps)

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Section: Matlab Warp Boardmentioning

confidence: 99%

“…To send data with a higher modulation order, it has been later proposed in [4] to use an array of multiple antennas, spaced by at least half a wavelength (to avoid coupling), instead of 1 antenna. The receiver analyses the wave scattered by the entire array.…”

Section: Introductionmentioning

confidence: 99%

First Experimental Ambient Backscatter Communication Using a Compact Reconfigurable Tag Antenna

Kokar

Phan-Huy

Fara

et al. 2019

2019 IEEE Globecom Workshops (GC Wkshps)

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“…For equally likely OFDM symbols, Pr(x m ) might be a constant for all x m ∈ X L . The computational complexity to solve (13) or (14) is prohibitively high for large M and L. Thus, we need to resort to low-complexity approaches.…”

Section: B Joint Demodulation and Em Algorithmmentioning

confidence: 99%

Matched-Filter-Based Backscatter Communication for IoT Devices Over Ambient OFDM Carrier

Choi

2019

IEEE Internet Things J.

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In this paper, we study backscatter communication (BC) for power-limited devices that are connected to a network for the Internet of Things (IoT), where joint estimation and detection is carried out at a receiver to detect signals from a backscatter device (BD) with ambient orthogonal frequency division multiplexing (OFDM) carrier. In conventional BC, in order to avoid the difficulty of the carrier estimation, the energy detector is usually considered at a receiver at the cost of poor performance. To improve the performance, in this paper, we consider a novel approach that allows the carrier estimation at the receiver via joint estimation and detection. In particular, in the proposed approach, the matched-filtering at the BD (for the transmitter filter) is employed to impose a certain property that allows efficient and reliable carrier estimation via joint estimation and detection. Through the performance analysis and simulation results, we show that the matched-filtering at the BD in the proposed approach can improve the performance.

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“…Some recent studies focus on the employment of multiple antennas at the reader to improve the backscatter performance in highly DLI-contaminated AmBC environments [14]- [18]. In [19], the authors propose to employ two antennas at the tag, with different transmit power levels, while in [20] a statistical covariance-based signal detection technique is considered, whose implementation requires the availability of large amount of samples.…”

Section: Introductionmentioning

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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Signal Detection Scheme in Ambient Backscatter System With Multiple Antennas

Cited by 35 publications

References 9 publications

First Experimental Ambient Backscatter Communication Using a Compact Reconfigurable Tag Antenna

First Experimental Ambient Backscatter Communication Using a Compact Reconfigurable Tag Antenna

Matched-Filter-Based Backscatter Communication for IoT Devices Over Ambient OFDM Carrier

Noncoherent Detection for Ambient Backscatter Communications Over OFDM Signals

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