Measurement of WLAN strength and evaluation of BER in OFDM based on indoor propagation

This project is done to measure the Wireless Local Area Network (WLAN) signal strength and evaluate the Bit Error Rate (BER) under indoor propagation. This study evaluated the BER in OFDM using Binary Phase Shift Keying (BPSK), Quaternary Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (16QAM) and 64 Quadrature Amplitude Modulation (64QAM), modulation techniques in multipath fading environment. MATLAB simulation was written to model and to simulate BPSK, QPSK, 16QAM and 64QAM under different channel conditions. A comparison study is carried out to obtain the best BER performance for each modulation techniques which was based on transmission scheme under Rayleigh Fading and Additive White Gaussian Noise (AWGN) channel conditions. The WLAN signal measurement was relate to the results of BER using BPSK, QPSK, 16QAM and 64QAM to identify which modulation techniques produces less noise.