Two-dimensional beam forming and interference reduction using different arrays

As the demand for mobile communications constantly increases, the need for better coverage, improved capacity, and higher transmission quality rises. Smart antennas used in code division multiple access (CDMA) systems can effectively maximize capacity, and improve reliability and coverage by directing beam patterns towards the desired signals, and null-patterns towards the interferers. In this work, with the use of different types of antennas arrays, one of the main issues related to smart antennas, viz., beam forming is studied. A modified constrained beam forming technique for planar arrays is proposed, and the BER performances of smart antennas with co-channel interference in uniform rectangular array (URA) and uniform circular array (UCA) are examined and compared.