Optimizing uplink beam pattern of smart antenna by phase-amplitude disturbance in a linear array

A smart antenna can offer several users in a co-channel at the same time so that the capacity of communication can be increased also. Based on an adaptive antenna and the idea of SDMA (space division multiple access) method, an uplink optimal radiation pattern design of smart antennas is developed by the author. In this paper, by a kind of two-way convergence skill, a smart antenna not only could cancel interference by placing s in the interfering directions but also could derive the maximum power radiation in the desired signal direction. Then, the signal to interference ratio (SIR) can be maximized. Smart antennas can achieve spatial division multiple access (SDMA) to offer several users in a co-channel. The uplink optimal pattern of a linear array is derived by phase-amplitude disturbances using a genetic algorithm. The optimal SDMA design can become true, and the uplink optimal radiation pattern design of smart antennas is derived. Several simulation results are also presented in this paper.