Intelligent Reflecting Surface Operation Under Predictable Receiver Mobility: A Continuous Time Propagation Model

Matthiesen, Bho; Björnson, Emil; Carvalho, Elisabeth de; Popovski, Petar

doi:10.1109/lwc.2020.3024781

Cited by 87 publications

(69 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In other words, the ISI elimination probability is the same for all M as we recall from Fig. 3, however, as M increases in the BER results, the effect of the numerator in (22) becomes more dominant than the remaining ISI terms in the denominator thus, diminishing its effect even more.…”

Section: Theoretical Error Probability Analysismentioning

confidence: 54%

“…In general, RIS literature mostly tends to focus on maximizing the sum-rate/achievable rate of a wireless communication system by adjusting the reflection phases of incoming signals to the RIS, hence, improving the signal-to-noise ratio (SNR) at the target receiver or receivers [21]. However, there have been other captivating studies with different approaches such as investigating the operation of an RIS under predictable mobility considering Doppler effect and delay spread [22], feasibility of mitigating multipath fading and Doppler effects stemming from mobile receivers [23] and so on [24]- [29]. In general, studies in the literature mostly consider flat-fading systems, and frequency-selective fading is not sufficiently investigated within the context of RIS systems except for some promising OFDM-based RIS solutions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Over-the-Air Equalization with Reconfigurable Intelligent Surfaces

Arslan,

Yildirim,

Kilinc

et al. 2021

Preprint

View full text Add to dashboard Cite

Reconfigurable intelligent surface (RIS)-empowered communications is on the rise and is a promising technology envisioned to aid in 6G and beyond wireless communication networks. RISs can manipulate impinging waves through their electromagnetic elements enabling some sort of a control over the wireless channel. In this paper, the potential of RIS technology is explored to perform equalization over-the-air for frequencyselective channels whereas, equalization is generally conducted at either the transmitter or receiver in conventional communication systems. Specifically, with the aid of an RIS, the frequencyselective channel from the transmitter to the RIS is transformed to a frequency-flat channel through elimination of inter-symbol interference (ISI) components at the receiver. ISI is eliminated by adjusting the phases of impinging signals particularly to maximize the incoming signal of the strongest tap. First, a general end-to-end system model is provided and a continuous to discretetime signal model is presented. Subsequently, a probabilistic analysis for the elimination of ISI terms is conducted and reinforced with computer simulations. Furthermore, a theoretical error probability analysis is performed along with computer simulations. It is demonstrated that with the proposed method, ISI can successfully be eliminated and the RIS-aided communication channel can be converted from frequency-selective to frequency-flat.

show abstract

Section: Theoretical Error Probability Analysismentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Over-the-Air Equalization with Reconfigurable Intelligent Surfaces

Arslan,

Yildirim,

Kilinc

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Furthermore, the joint optimization of the active transmit beamformer and of the passive reflection-based beamforming was proposed for maximizing the received SNR. As a further evolution, by exploiting the predictable mobility of LEO satellites, the authors of [243] developed a continuous time model and optimized the configuration of IRSs with respect to the timevariant received SNR, Doppler frequency shifts, and delay.…”

Section: E Irs-aided Secure Transmissionmentioning

confidence: 99%

On the Security of LEO Satellite Communication Systems: Vulnerabilities, Countermeasures, and Future Trends

Yue¹,

An²,

Zhang³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…As a result, it is crucial to design effective signal processing schemes to avoid a prohibitively high overhead in high-mobility scenarios. Furthermore, the RIS has the potential to reduce the Doppler and delay spread [247], which deserves further research in more practical scenarios.…”

Section: A Mobilitymentioning

confidence: 99%

An Overview of Signal Processing Techniques for RIS/IRS-aided Wireless Systems

Pan,

Zhou,

Zhi

et al. 2021

Preprint

View full text Add to dashboard Cite

In the past as well as present wireless communication systems, the wireless propagation environment is regarded as an uncontrollable black box that impairs the received signal quality, and its negative impacts are compensated for by relying on the design of various sophisticated transmission/reception schemes. However, the improvements through applying such schemes operating at two endpoints (i.e., transmitter and receiver) only are limited even after five generations of wireless systems. Reconfigurable intelligent surface (RIS) or intelligent reflecting surface (IRS) have emerged as a new and revolutionary technology that can configure the wireless environment in a favorable manner by properly tuning the phase shifts of a large number of quasi passive and low-cost reflecting elements, thus standing out as a promising candidate technology for the next-/sixth-generation (6G) wireless system. However, to reap the performance benefits promised by RIS/IRS, efficient signal processing techniques are crucial, for a variety of purposes such as channel estimation, transmission design, radio localization, and so on. In this paper, we provide a comprehensive overview of recent advances on RIS/IRS-aided wireless systems from the signal processing perspective. We also highlight promising research directions that are worthy of investigation in the future.

show abstract

Intelligent Reflecting Surface Operation Under Predictable Receiver Mobility: A Continuous Time Propagation Model

Cited by 87 publications

References 13 publications

Over-the-Air Equalization with Reconfigurable Intelligent Surfaces

Over-the-Air Equalization with Reconfigurable Intelligent Surfaces

On the Security of LEO Satellite Communication Systems: Vulnerabilities, Countermeasures, and Future Trends

An Overview of Signal Processing Techniques for RIS/IRS-aided Wireless Systems

Contact Info

Product

Resources

About