Wavelet packet transform based de-noising receiver for indoor optical wireless system

Abstract

This paper reports systematic appraisal of wavelet transform based de-noising receiver, for high speed indoor optical wireless communication. For upcoming high speed indoor optical wireless communication systems, wavelet transform based de-noising receiver in indoor environment represent grand consideration. Performance evaluation is carried out in the presence of natural (sunlight) and artificial light sources (incandescent light) in typical room environment. The performance of receiver is considered in two arrangements: They are single channel imaging receiver (SCIR) and wavelet transform based de-noising receiver. The second scheme provides better results than first scheme (SCIR). The simulation results for both SCIR and wavelet transform based de-noising receiver are shown. The simulation results indicate that the wavelet packet transform (WPT) based de-noising receiver offers increased received optical power, signal to noise ratio (SNR), and reduced bit error rate (BER), path loss compared to the SCIR and discrete wavelet transform based de-noising receiver.