Iterative signal detection under timing errors for optical wireless links with high mobility

Name: Iterative signal detection under timing errors for optical wireless links with high mobility
Author: Dabiri, M. T., Khankalantary, S., Safi, H., Piran, Md.J., Ansari, I. S., Suh, D.Y., Uysal, Murat

İsim	Iterative signal detection under timing errors for optical wireless links with high mobility
Yazar	Dabiri, M. T., Khankalantary, S., Safi, H., Piran, Md.J., Ansari, I. S., Suh, D.Y., Uysal, Murat
Basım Tarihi:	2021-11-01
Basım Yeri	- IEEE
Konu	Atmospheric turbulence, Blind data detection, Differential signaling, Free-space optics, Synchronization
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0018-9545
Kayıt Numarası	d9132bb3-6d14-4b8b-a4d0-fd69399669da
Lokasyon	Electrical & Electronics Engineering
Tarih	2021-11-01
Örnek Metin	In this paper, the problem of timing error for freespace optical links with high mobility is investigated. In particular, we consider a real scenario in which the sampling clock offset is randomly changing and, in addition, the receiver has no information about the instantaneous channel coefficient as well as instantaneous timing error. Moreover, we consider a general case with signal dependent noise. For the considered scenario, for a conventional receiverwith one sampler, we propose an iterative detectionmethod based on the expectation-maximization (EM) algorithm. In the presence of large values of sampling clock offset, shifted error is the dominant error. Hence, in order to reduce the impact of shifted error probability, we propose an iterative data detection method for a receiver which utilizes two shifted samplers. The proposed iterative detection method only requires a series of simple addition and multiplication operation and does not require to solve any integral equations. A set of simulation results are provided to study the system performance for the proposed detectionmethods. Simulation results demonstrate that for a receiver with two samplers, by using the proposedEM-based detector,we can achieve bit error rate performance very close to the ideal receiver that perfectly knows the instantaneous channel coefficient and sampling clock offset.
DOI	10.1109/TVT.2021.3113603
Cilt	70

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Iterative signal detection under timing errors for optical wireless links with high mobility

Yazar Dabiri, M. T., Khankalantary, S., Safi, H., Piran, Md.J., Ansari, I. S., Suh, D.Y., Uysal, Murat

Basım Tarihi 2021-11-01

Basım Yeri - IEEE

Konu Atmospheric turbulence, Blind data detection, Differential signaling, Free-space optics, Synchronization

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0018-9545

Kayıt Numarası d9132bb3-6d14-4b8b-a4d0-fd69399669da

Lokasyon Electrical & Electronics Engineering

Tarih 2021-11-01

Örnek Metin In this paper, the problem of timing error for freespace optical links with high mobility is investigated. In particular, we consider a real scenario in which the sampling clock offset is randomly changing and, in addition, the receiver has no information about the instantaneous channel coefficient as well as instantaneous timing error. Moreover, we consider a general case with signal dependent noise. For the considered scenario, for a conventional receiverwith one sampler, we propose an iterative detectionmethod based on the expectation-maximization (EM) algorithm. In the presence of large values of sampling clock offset, shifted error is the dominant error. Hence, in order to reduce the impact of shifted error probability, we propose an iterative data detection method for a receiver which utilizes two shifted samplers. The proposed iterative detection method only requires a series of simple addition and multiplication operation and does not require to solve any integral equations. A set of simulation results are provided to study the system performance for the proposed detectionmethods. Simulation results demonstrate that for a receiver with two samplers, by using the proposedEM-based detector,we can achieve bit error rate performance very close to the ideal receiver that perfectly knows the instantaneous channel coefficient and sampling clock offset.

DOI 10.1109/TVT.2021.3113603

Cilt 70