Performance Analysis of QAM with MEMS Based SCIR for Indoor Optical Wireless Communication

This paper presents the systematic evaluation of performance of indoor optical wireless communication using different modulation schemes and micro electro mechanical systems - single channel imaging receiver (MEMS-SCIR). For the future modern world, indoor optical wireless communications (OWC) play a vital role. The main objective is to compare the performance of various modulation schemes in terms of their bit error probability. On -off keying (OOK) and pulse position modulation (PPM) are widely used in optical wireless communication for its simplicity. Here different digital modulation schemes are approached; bit error rate (BER) is calculated over additive white Gaussian noise channel (AWGN). M-quadrature amplitude modulation (MQAM) gives a better BER performance compared to the M- phase shift keying (MPSK). Thus, MQAM based MEMS-SCIR provides better performance in indoor optical wireless communications.