I. Introduction
Direct sequence-code division multiple access (DS-CDMA) is a popular technique in cellular and personal wireless communication. Its performance is mostly interference limited. Despite the large amount of research on interference cancelling receivers in the past twenty years, and the large performance improvements offered by these techniques, they have seen only limited applications in practice due to their computational complexity, cost, and power consumption [1]. It has also been pointed out [2], that due to growth in data communications and limited available spectrum, increases in capacity are becoming even more important. Adoption of interference cancellation is a good solution to achieve this goal [2].