PARAMETER ESTIMATION IN AN LED-CAMERA VISIBLE LIGHT COMMUNICATION SYSTEM

Abstract

Visible light communication (VLC) is emerging as a complementary technology to radio frequency communication. Some of the benefits of VLC include reusable bandwidth, security and high potential data rates. VLC can also be used in user positioning. For both communication and positioning systems, knowledge of the VLC channel parameters is usually needed. This paper investigates the estimation of the light-emitting diode (LED) parameters and user positions. The performance of the proposed estimation technique is numerically studied. Cram´er Rao lower bound (CRLB) results are derived and compared with the results obtained from the proposed maximum likelihood estimator. The effect of channel estimation on overall communication performance in terms of symbol error rate (SER) is also studied. The SER results using the estimated channel closely match with known channel results.