Channel Estimation for Realistic Indoor Optical Wireless Communication in ACO-OFDM Systems

Ozmen A., Senol H.

WIRELESS PERSONAL COMMUNICATIONS, cilt.102, sa.1, ss.247-259, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 102 Sayı: 1
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1007/s11277-018-5837-8
  • Dergi Adı: WIRELESS PERSONAL COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.247-259
  • İstanbul Kültür Üniversitesi Adresli: Hayır

Özet

In this paper, channel estimation problem in a visible light communication system is considered. The information data is transmitted using asymmetrical clipped optical orthogonal frequency division multiplexing. Channel estimation and symbol detection are performed by the Maximum Likelihood and the Linear Minimum Mean Square Error detection techniques, respectively. The system performance is investigated in realistic environment that is simulated using an indoor channel model. Two different channels are produced using the indoor channel model. Symbol error rate (SER) performance of the system with estimated channels is presented for QPSK and 16-QAM digital modulation types and compared with the perfect channel state information. As a mean square error (MSE) performance benchmark for the channel estimator, Cramer-Rao lower bound is also derived. MSE and SER performances of the simulation results are presented.