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In this paper, the author has tried to present a performance of rake receiver for Code Division Multiple Access (CDMA) system in mobile communication. Rake receiver is the efficient receiver which is used in Code Division Multiple Access (CDMA) technology. In this paper, the author have measure Bit Error Rate (BER) of rake receiver with respect to Signal to Noise Ratio (SNR) for different speed of the mobile. By varying the velocity of the mobile the author have measure the Bit Error Rate (BER). The author has considered the more fading environment channel that is rayleigh channel.