Validation of Backscatter Link Budget Simulations with Measurements at 915 MHz and 2.4 GHz

Sheikh, Muhammad Usman; Duan, Ruifeng; Jäntti, Riku

doi:10.1109/vtcspring.2019.8746365

Cited by 15 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the simulation, we locate S and D at the points

(0, 0)

m

and

(8, 0)

m

, respectively [10]. The coordinates of

T_{i}

are

(d_{1 i}, 0)

m

, and the channel means from S to

T_{i}

and

T_{i}

to D are determined as

λ_{1 i} = {(\frac{1}{4 π f})}^{2} G_{normalS} G_{normalT} d_{1 i}^{- α}

and

λ_{2 i} = {(\frac{1}{4 π f})}^{2} G_{normalT} G_{normalD} {(8 - d_{1 i})}^{- α}

[10, 11, 17, 18], where

G_{S}

G_{T}

and

G_{D}

denote the antenna gains at S,

T_{i}

and D with

G_{normals} = G_{normalD} = G_{normalT} = 6

dBi [18], respectively;

f = 915

MHz is the RF [17];

α = 2

is the path loss exponent [11]. Other system parameters are set as follows:

η = 0.6...

…”

Section: Numerical Resultsmentioning

confidence: 99%

Optimal tag selection scheme for a backscatter communication system over the independent but not necessarily identically distributed Rayleigh fading channels

Liu

Yan

et al. 2021

Electronics Letters

View full text Add to dashboard Cite

This letter analyses the outage performance of the optimal tag selection scheme for the proposed backscatter communication system. The consumed power by the tag's circuit is considered and the harvested power is described using the non-linear model. On the premise of the harvested power satisfying its own consumption, the tag that can maximise the received effective signal-to-noise ratio at the destination is selected to convey its own information. The analytical results of the outage probability for the proposed optimal tag selection scheme are derived over the independent but not necessarily identically distributed Rayleigh fading channels, and the diversity order is also obtained with the help of the derived high signal-to-noise ratio approximations. The numerical results verify our theoretical analysis and show that the proposed optimal tag selection scheme has the best performance compared to other counterparts under different parameter setups .

show abstract

“…In the simulation, we locate S and D at the points

(0, 0)

m

and

(8, 0)

m

, respectively [10]. The coordinates of

T_{i}

are

(d_{1 i}, 0)

m

, and the channel means from S to

T_{i}

and

T_{i}

to D are determined as

λ_{1 i} = {(\frac{1}{4 π f})}^{2} G_{normalS} G_{normalT} d_{1 i}^{- α}

and

λ_{2 i} = {(\frac{1}{4 π f})}^{2} G_{normalT} G_{normalD} {(8 - d_{1 i})}^{- α}

[10, 11, 17, 18], where

G_{S}

G_{T}

and

G_{D}

denote the antenna gains at S,

T_{i}

and D with

G_{normals} = G_{normalD} = G_{normalT} = 6

dBi [18], respectively;

f = 915

MHz is the RF [17];

α = 2

is the path loss exponent [11]. Other system parameters are set as follows:

η = 0.6...

…”

Section: Numerical Resultsmentioning

confidence: 99%

Optimal tag selection scheme for a backscatter communication system over the independent but not necessarily identically distributed Rayleigh fading channels

Liu

Yan

et al. 2021

Electronics Letters

View full text Add to dashboard Cite

show abstract

“…The channel taps are modeled as circularly-symmetric complex Gaussian random variables, with path-losses given by [45], [46]…”

Section: Numerical Resultsmentioning

confidence: 99%

Noncoherent Detection for Ambient Backscatter Communications Over OFDM Signals

Darsena

2019

IEEE Access

View full text Add to dashboard Cite

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.

show abstract

“…The direct path channelā is the phasor sum of all the multipath components that are not modulated by the tag, while the backscatter path channelh is the phasor sum of the multipath components that are modulated by the tag. The average large-scale path-loss based on deployment geometry and free-space in the presence of Line-of-Sight (LOS) components can be represented as [33], [34] 1…”

Section: Channel Modelmentioning

confidence: 99%

Coherent Multiantenna Receiver for BPSK-Modulated Ambient Backscatter Tags

Wang

Yi̇ği̇tler

Duan

et al. 2022

IEEE Internet Things J.

Self Cite

View full text Add to dashboard Cite

Ambient Backscatter Communication (AmBC) is an emerging communication technology enabling green Internet-of-Things deployments. The widespread acceptance of this paradigm is limited by the low Signal-to-Interference-Plus-Noise Ratio (SINR) of the signal impinging on the receiver antenna due to the strong direct path interference and unknown ambient signal. The adverse impact of these two factors can be mitigated by using non-coherent multi-antenna receivers, which are known to require a higher SINR to reach the Bit-Error-Rate (BER) performance of coherent receivers. However, considering the unknown ambient signal, unknown location of AmBC tags, and varying channel conditions, coherent receivers for AmBC systems are rarely studied in literature. In this paper, a coherent multi-antenna receiver, which requires no prior information of the ambient signal for decoding the Binary-Phase-shift-Keying (BPSK) modulated signal, is presented. The performance of the proposed receiver is compared with an ideal coherent receiver that has perfect phase information, and also with the performance of a non-coherent receiver, which assumes distributions for ambient signal and phase offset caused by the excess length of the backscatter path. Comparative simulation results show the designed receiver can achieve the same BER performance of the ideal coherent receiver with 1-dB more SINR, which corresponds to 5-dB or more gain with respect to non-coherent reception of On-Off-Keying modulated signals. Variation in the detection performance with the tag location shows that the coverage area is in the close vicinity of the transmitter and a larger region around the receiver, which is consistent with the theoretical results.

show abstract

Validation of Backscatter Link Budget Simulations with Measurements at 915 MHz and 2.4 GHz

Cited by 15 publications

References 13 publications

Optimal tag selection scheme for a backscatter communication system over the independent but not necessarily identically distributed Rayleigh fading channels

Optimal tag selection scheme for a backscatter communication system over the independent but not necessarily identically distributed Rayleigh fading channels

Noncoherent Detection for Ambient Backscatter Communications Over OFDM Signals

Coherent Multiantenna Receiver for BPSK-Modulated Ambient Backscatter Tags

Contact Info

Product

Resources

About