Cascaded Channel Estimation Using Full Duplex for IRS-Aided Multiuser Communications

Lin, Shaoe; Wen, Miaowen; Chen, Fangjiong

doi:10.1109/wcnc51071.2022.9771718

Cited by 4 publications

(5 citation statements)

References 22 publications

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“…Specifically, the AP-RIS distance was 20m with path loss exponent (PLE) of 2.1, users-RIS distance was 20m with PLE of 4.2, and APusers distance was 30m with PLE of 2.2. The self-interference channel was modeled as Rayleigh fading having normalized channel power [7]. We set P A = P U = P such that the signalto-noise ratio (SNR) is defined as P/σ 2 .…”

Section: B Pilot Transmission and Ris Phase Valuesmentioning

confidence: 99%

“…Hu et al considers a multiple-inputmultiple-output (MIMO) system and performs CE at the access point (AP) by using two half-duplex (HD) transmission stages: in the first stage the AP-RIS channel is estimated, while in the second the users-RIS channel is estimated [6]. A similar approach is adopted in [7] where only one user operates in FD while all other users and the AP are HD receivers. In [8], a graph attention network is used to estimate the cascaded (AP-RIS-users) channel but only consider a SISO transceiver model.…”

Section: Introductionmentioning

confidence: 99%

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Channel Estimation for Reconfigurable Intelligent Surface-Assisted Full-Duplex MIMO with Hardware Impairments

Fernandes¹,

Psaromiligkos²

2023

Preprint

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We consider the problem of channel estimation in a multiple-input-multiple-output (MIMO) full-duplex (FD) wireless communication system assisted by a reconfigurable intelligent surface (RIS) with hardware impairments (HI) occurring at the transceivers and RIS elements. We propose an unbiased channel estimator that requires knowledge of only the first and second order statistics of the HI, for which we derive closed form expressions. The proposed estimator reduces to the maximum likelihood estimator in the case of ideal hardware. We also describe a FD pilot scheme that significantly reduces the computational complexity of obtaining this channel estimate. We verify the performance of the estimator under varying conditions of transceiver and RIS HI via numerical simulations.

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Section: B Pilot Transmission and Ris Phase Valuesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Channel Estimation for Reconfigurable Intelligent Surface-Assisted Full-Duplex MIMO with Hardware Impairments

Fernandes¹,

Psaromiligkos²

2023

Preprint

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show abstract

“…in which j = √ −1, and L is a suitable contour on the complex plane 1 . From the formulations, it is evident that there is a clear relationship between the Mellin transform and the generalized moments of a positive fading distribution.…”

Section: A General Framework For Obtaining the Pdfmentioning

confidence: 99%

“…Hence, an expression for the ratio of one by product of two variates arises naturally. 1 Please, refer to [14] for an appropriate contour…”

Section: The Reciprocal Distributionmentioning

confidence: 99%

“…Enabling technologies such as cascaded channel [1]- [3], reconfigurable/large intelligent surfaces (R/LIS) [3]- [5], multihop links [6], [7], massive MIMO systems [8]- [10] have physical models based on the product of fading variables, characterizing a composite fading signal. Hence, the behavior of composite channels and statistics of the product of random envelopes have been receiving great attention in the literature [11]- [13].…”

Section: Introductionmentioning

confidence: 99%

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Ratio of the Product-of-Two to One Variates: A Framework - Application to κ-μ and η-μ

Silva¹,

Yacoub²

2022

Anais Do XL Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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The performance analyses of a number of fading scenarios require the knowledge of some of the statistics of the product and the ratio of the involved variates. With the advent of several enabling technologies, e.g., reconfigurable/large intelligent surfaces, massive MIMO, cooperative communications, deviceto-device, vehicle-to-vehicle communications, and others, this is even more evident. In this paper, we provide a framework for the derivation of probability density functions and the cumulative distribution functions for the ratio of the product-of-two to one variates. The framework is then used to derive these statistics for all possible combinations of these variates taken from κ-µ and η-µ fading models. The expressions are obtained in terms of a simple-to-compute single-sum infinite series, with convergence attained very rapidly.

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Beamforming Design in Vehicular Communication Systems With Multiple Reconfigurable Intelligent Surfaces: A Deep Learning Approach

Saikia,

Singh,

Singh

et al. 2023

IEEE Access

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Cascaded Channel Estimation Using Full Duplex for IRS-Aided Multiuser Communications

Cited by 4 publications

References 22 publications

Channel Estimation for Reconfigurable Intelligent Surface-Assisted Full-Duplex MIMO with Hardware Impairments

Channel Estimation for Reconfigurable Intelligent Surface-Assisted Full-Duplex MIMO with Hardware Impairments

Ratio of the Product-of-Two to One Variates: A Framework - Application to κ-μ and η-μ

Beamforming Design in Vehicular Communication Systems With Multiple Reconfigurable Intelligent Surfaces: A Deep Learning Approach

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