A Study of the Performance of Diversity Combining Schemes on Multipath Fading at 900MHz

摘要

The work presents the investigation of Gaussian Minimum Shift Keying (GMSK) and Binary Phase Shift Keying (BPSK) transmission schemes with Department of Electrical and Electronics Engineering. E-mail: falade.alaba@yahoo.com. Phone: +2347053244999.both Maximum Ratio Combining (MRC) and Equal Gain Combining (EGC) diversity combining techniques over Rayleigh flat fading (RFF) channels in a digital mobile wireless system. The System model for the received signal was developed under L-propagation paths and then simulated. Randomly generated symbols and image data was used as the Information signal. The results obtained showed that BPSK had a higher error probability value than the corresponding GMSK scheme. The results also showed that due to GMSK high immunity to noise and other interfering signals, it provides a better performance than BPSK signalling scheme. MRC was observed to perform better in terms of mitigation of the interference induced by the Rayleigh channel than EGC diversity combining technique. The quality of the images received with both signalling schemes were in agreement with the Bit Error Rate (BER) results.