DSP Control of Smart Antennas

Abstract

Modern beam steered antennas where pattern is shaped according to optimum criteria. Smart antennas are the practical realization of adaptive array signal processing. Smart antennas can be applied to mobile wireless communication, WLAN, Wi-Max, MANET, MIMO systems; satellite communication etc. In mobile wireless communication smart antenna can provide higher system capacity by directing narrow beams towards users of interest. Smart antennas mitigate the effects multi-path fading. Smart antennas pattern are controlled via adaptive algorithms based upon maximizing signal to interference ratio, minimizing mean square Error (MSE), steering towards signal of interest, nulling interference. A smart antenna consists of an array of antenna elements (Dipole, Microstrip etc) and uses Digital Signal Processing (DSP) for phase shifting of the signal feed to individual elements of the array. In this paper, we are going to design a DSP control smart antennas array with digital beam forming techniques. Multiple Resonant is achieved by changing the structure of normal patch antenna. These antennas will be suitable for mobile and wireless LAN communication