Least minimum symbol error rate based post-distortion for adaptive mobile VLC transmission with receiver selection
Yükleniyor...
Dosyalar
Tarih
2021-08
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In the context of beyond-5G indoor communication systems, visible light communication (VLC) has emerged as a viable supplement for existing RF-based systems and as an enabler for high datarate communications. However, the existing indoor VLC systems are limited by detrimental outages caused by fluctuations in the VLC channel-gain due to user-mobility. Furthermore, the nonlinear characteristics of the light-emitting diode (LED) degrade the performance of VLC systems in the highpower regime by warping the input constellation. Additional performance-limits are introduced by inter-symbol interference (ISI) due to finite modulation-bandwidth of LEDs, and reflections from walls. In this paper, a random Fourier feature (RFF) based post-distorter is considered for mitigating the LED nonlinearity, and relevant expressions for the signal to noise ratio (SNR) are derived for a direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) system. Based on the derived expressions for SNR, the effects of user-mobility and ISI are mitigated by a DCO-OFDM based adaptive VLC transmission technique, which varies the transmission-rate/modulation-order under a specified error-rate constraint. Simulations are presented over channels obtained by ray-tracing, which indicates that the proposed algorithm achieves superior data-rates with a significantly lower error-rate.
Açıklama
Anahtar Kelimeler
Adaptive transmission, RFF, RKHS, Visible light communications, Errors, Intersymbol interference, Light, Light emitting diodes, Orthogonal frequency division multiplexing, Signal to noise ratio, Error rate constraints, High data rate communications, Indoor communication systems, Minimum symbol error rates, Nonlinear characteristics, Optical orthogonal frequency division multiplexing, Transmission techniques, Visible light communications (VLC), Visible light communication, Diffuse, Led nonlinearity, DCO-OFDM, ACO-OFDM, Performance, Systems
Kaynak
Physical Communication
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
47
Sayı
Künye
Miramirkhani, F., Karbalayghareh, M. & Mitra, R. (2021). Least minimum symbol error rate based post-distortion for adaptive mobile VLC transmission with receiver selection. Physical communication, 47, 1-8. doi: 10.1016/j.phycom.2021.101353
