Ambient Backscatter Communication Systems: Detection and Performance Analysis

Wang, Gongpu; Gao, Feifei; Fan, Rongfei; Tellambura, Chintha

doi:10.1109/tcomm.2016.2602341

Cited by 381 publications

(248 citation statements)

References 30 publications

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“…Without the repeating structure, we may consider the approach in [11], which is proposed for a narrowband system, with a modification for a wideband system (i.e., an OFDM system).…”

Section: B Without Repeating Structurementioning

confidence: 99%

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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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“…Without the repeating structure, we may consider the approach in [11], which is proposed for a narrowband system, with a modification for a wideband system (i.e., an OFDM system).…”

Section: B Without Repeating Structurementioning

confidence: 99%

“…For example, we have s m ∈ S = {−1, +1}, while S = {0, 1} for noncoherent communication in [11]. Then, the received signal (in the frequency-domain) at the receiver becomes…”

Section: B Without Repeating Structurementioning

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 fading block n, the signal received at the ST from the PT is f (n)x P T (n; k). Note that the noise at the ST (Tag) is neglected as [9], [10], [11], [12], [14], [18] since the on-tag integrated circuit only includes passive components. The power of the received signal at the ST from the PT is f (n)p(n).…”

Section: B Transmission Modelmentioning

confidence: 99%

“…(8), (9), (10), (11). (13) For notation convenience, the fading block number n is dropped from now on.…”

Section: P1mentioning

confidence: 99%

Riding on the primary: A new spectrum sharing paradigm for wireless-powered IoT devices

Kang

Liang

Yang³

2017

2017 IEEE International Conference on Communications (ICC)

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In this paper, a new spectrum sharing model referred to as riding on the primary (ROP) is proposed for wireless-powered IoT devices with ambient backscatter communication capabilities. The key idea of ROP is that the secondary transmitter harvests energy from the primary signal, then modulates its information bits to the primary signal, and reflects the modulated signal to the secondary receiver without violating the primary system's interference requirement. Compared with the conventional spectrum sharing model, the secondary system in the proposed ROP not only utilizes the spectrum of the primary system but also takes advantage of the primary signal to harvest energy and to carry its information. In this paper, we investigate the performance of such a spectrum sharing system under fading channels. To be specific, we maximize the ergodic capacity of the secondary system by jointly optimizing the transmit power of the primary signal and the reflection coefficient of the secondary ambient backscatter. Different (ideal/practical) energy consumption models, different (peak/average) transmit power constraints, different types (fixed/dynamically adjustable) reflection coefficient, different primary system's interference requirements (rate/outage) are considered. Optimal power allocation and reflection coefficient are obtained for each scenario.

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“…This permits cost, space, and power saving for semi-passive devices for guaranteed longevity with the available power resources. It is also possible to use the ambient signals from radio stations for the backscatter communications; the ambient signals are used to illuminate the tag device instead of the reader's transmitter [5][6][7]. Considering high data rate communication for data-intensive applications, we target hardening the communication channel with a semi-passive tag device in the multipath fading channels.…”

Section: Introductionmentioning

confidence: 99%

Coherent query scheme for wireless backscatter communication systems with single tag

Hasanvand

Khaleghi

Balasingham

2018

J Wireless Com Network

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An un-coded multi-transmitter query scheme is introduced for wireless backscatter communication systems in which M transmitters and N receivers are used for single-tag connectivity (M × 1 × N). The main idea is to harden the wireless communication channel with a tag device for high data rate readings. The proposed method is designed for multipath fading channels in which the backscatter channel is a multiplicative Rayleigh. A coherent transmit query scheme is used to increase the tag-reflected signals and simultaneously alter the fading statistics in the forward path by implementing a receiver feedback. Full-diversity performance and array gain is achieved using the receiver diversity without requiring any tag antenna diversity. Therefore, the tag device remains simple. Mathematical expressions for the probability density function (PDF) of the backscatter channel are presented using closed-form equations. Bit error rate (BER) simulations for the binary phase shift keying (BPSK) modulation are computed numerically. Diversity gain of 10 dB is obtained by using a 2 × 1 × 1 scheme. The results show that the transmit diversity for single-tag usage performs the same as the tag antenna diversity, at the expense of a moderate transmitter complexity. The tag device remains intact as a requirement for the simplicity and size constraints. Also, the system realization becomes more feasible due to the available space on the transmitter side to accomplish the uncorrelated forward channel conditions. The feasibility study is demonstrated using softwaredefined radio (SDR) implementations.

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Ambient Backscatter Communication Systems: Detection and Performance Analysis

Cited by 381 publications

References 30 publications

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

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

Riding on the primary: A new spectrum sharing paradigm for wireless-powered IoT devices

Coherent query scheme for wireless backscatter communication systems with single tag

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