Spread spectrum methods are used by users in CDMA, and the full spectrum is utilized during transmissions; this multiple access method is known as CDMA. There is a strong correlation between the signal-to-noise ratio (SNR) and the overall system performance in wireless communications. Channel impairments including noise, interference, and fading may occur in any mobile transmission method. The signal-to-noise ratio (SNR) dropped because of the distorted signal and the impaired channel. Additionally, uplink (forward channel) and downlink (reverse channel) communication have distinct characteristics (reverse channel). In addition to these dissimilarities, the two links use distinct sets of codes in order to direct their respective customers. In this study, we model the formulas for the pdfs of the SNR for both uplink and downlink transmission, assuming that the system is running with an average signal-to-noise ratio of 6dB per data bit.

CDMA, SNR, downlink, uplink, multipath fading