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In wireless communication security, Signal to Noise Ratio (SNR) and Bit Error Rate (BER) are the important parameters to be improved. Frequency Hopping Spread Spectrum (FHSS) combined with Nagakami Fading Channel (NFC) and combined diversity techniques have been proposed to improve the performance of multi-user system. Combined diversity is nothing but a combination of Maximal Ratio Combining (MRC) and RAKE Receiver. Nagakami fading channel supports both line of sight and multipath communication so that it can tolerate both weak and severe fading. FHSS is used to enhance security in areas where secured communication is needed. Combined diversity technique is used to avoid fading (i.e random fluctuations in signal) and to increase the SNR.
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