A novel blind adaptive algorithm applied to new designed smart antenna array for interference suppression

In this study, a novel blind adaptive algorithm with discrete periodic variables is introduced. The proposed discrete periodic variable algorithm (DPVA) has been applied to the new designend ۷-element antenna array. The DPVA is based on minimizing the output power to steer null (or nearly null) gain in the direction of interference. Discrete phase shift leads to the use of hybrid phase shifter in practice and thus reduction of implementation costs. In addition, the proposed algorithm has low computational complexity. Results show that DPVA has fast and reliable convergence. It is converged within less than ۴۰۰ iterations and less than ۱ millisecond time duration. The null depth created by this algorithm is ۹۰ \(dB\) which is an indication of pure cancellation of the interference. Furthermore, the effect of a number of interference sources is investigated. It is shown that the null depth is decreased by the increase of interference sources. In the studied ۷-element array, increasing the interference sources up to ۶ decreases the null depth to ۲۰ \(dB\).

Keywords:

Optimization , Blind adaptive algorithm , Discrete phase shift , Beamforming , Smart antenna