Code Division Multiple-Access (CDMA) systems performance [Signal to Noise Ratio (SNR), Bit Error Rate (BER)] depends mainly on the multiple access interference (MAI). MAI is an inherent CDMA property connected to correlation characteristics of codes used for accessing and spreading. In this paper we present the results of interference analysis for the conventional pseudo noise sequences (M, Gold sequences) as well as for the new class of Pseudo Noise-Even Balanced ( PN-EB) sequences. Interference analysis is done for a binary direct sequence spread spectrum multiple access (DS/SSMA) communication system with an additive white Gaussian noise channel. Correlation parameters such as the average interference parameter (AIP) that are important for spread spectrum communication are evaluated.