Abstract: In this paper error performance of multi-user code division multiple access (CDMA) system with block coding and interleaving over alpha mu (a-) fading channel is analysed. It is shown by analysis that with increase in number of users SNR decreases hence the error performance of the system deteriorates. This has been established by simulation over a- channel for various a and values.

Keywords: a- fading, random interleaving, bit error rate, code division multiple access, Walsh-Hadamard code, multi-user interference.