completing the process. These factors include: propagation en- vironment, BS configuration, environmental issues as a result of power levels, and net- work integration in terms of the RNC. However, here we consider first the BS configu- ration by looking at the antenna design. We need low correlation between the antennas achievable by adequate separation between the antennas. The beam forming technique may exploit a uniform linear array, where the inter-antenna spacing falls near 1/2 of a carrier wavelength. Then sectors using narrow beams will have an increased antenna gain when compared to typical sector antenna. Evolving Mobile Networks While pico and micro environments have higher angular diversity, the macro environ- ment has lower angular diversity, but higher multi-path diversity. Thus, the macro envi- ronment can benefit from beam forming techniques, because the latter applies more lower angular diversity conditions. The optimum number of branches will depend on the accuracy of the channel estimation, Godara [19,20] presents more beam forming options related to mobile applications. 1.3.2 Multi-user Detection Techniques Multi-user Detection (MUD) techniques may apply to both the UL and DL. However, initially due to processing power constraints in the MS, MUD may be exploited first in the BS. Thus, here we look at performance enhancement primarily in the UL while im- plementing MUD in the BS. The two UTRA modes, i.e. FDD and TDD can benefit from MUD techniques. In fact, the joint detection algorithm is already an inherent part of the TDD mode. Capacity within interference-limited WCDMA can improve through the use of efficient receivers. This implies that the structured multiple access interference can be dealt with at the receiver through multi-user detectors [21]. MUD techniques have been covered at length in Refs. [22,23]. Here we aim to point out some of the promising techniques, which can apply to future releases of the WCDMA mode. Studies in MUD techniques for WCDMA BS receivers [24-26], indicate that 