AWGN and Rayleigh Fading effects on BER Compression for Multimedia Application for OFDM system with Different Modulation Techniques

This research offers an analyzing study for BER in OFDM system through Module designed by matlab, the performance was tested with different modulation techniques as PBSK, 8PBSK…. The measurement was taken at multi AWGN levels for different modulation techniques besides BER testing in Rayleigh fading channel and without Rayleigh fading All results illustrated in suitable tables and curve.

Studying the Effects of Bandwidth and Bit Error Rate on the OFDM Technique Using Fuzzy Logic

This work aims to analyze the performance of Orthogonal Frequency Division Multiplexing (OFDM) applied in the fourth generation mobile networks and WiFi. Fuzzy logic technique is used in this study to analyze the problem of OFDM, taking into consideration the modulation techniques applied in OFDM. Three input parameters in the fuzzy logic system are mainly considered: signal-to-noise ratio, the modulation degree and the number of sub-carriers. The output parameters are selected to be the bandwidth and bit error rate. This requires an analytical study to determine the optimal values of the input parameters used in this study. This means studying the membership of functions of each input and output parameter using fuzzy logic.