Adaptive beamformers using 2D-novel ULA for cellular communication

• Published in: SN applied sciences Vol. 1; no. 9; p. 1001
• Main Authors: Dakulagi, Veerendra, Alagirisamy, Mukil
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.09.2019; Springer Nature B.V
• Subjects: Adaptive algorithms; Algorithms; Antennas; Applied and Technical Physics; Beamforming; Cellular communication; Chemistry/Food Science; Communication; Communications systems; Digital signal processors; Earth Sciences; EMC; Engineering; Engineering: Electromagnetics: Antennas; Environment; Fields; Interference; Linear arrays; Materials Science; Numerical Techniques; Radiation; Research Article; Sensors; Waves; NLMS; WiMAX; MIMO; LMS; ULA; 4G LTE
• ISSN: 2523-3963; 2523-3971; 2523-3971
• DOI: 10.1007/s42452-019-1009-z

This paper presents the use of a novel two dimensional (2D) uniform linear array for adaptive beamforming algorithms. We used this novel antenna configuration to study the popular adaptive beamforming algorithms, namely, least mean square algorithm (LMS) and least normalized mean square algorithm (NLMS) and also proposed a variable step-size NLMS (VSSNLMS) algorithm. These beamformers are named as 2D-LMS, 2D-NLMS and 2D-VSSNLMS algorithms respectively. These algorithms not only improve the convergence rate but also mitigates the effect of interference by producing deep nulls in the interference directions. These algorithms are suitable for low-power, low-cost, anti-interference MIMO-WLAN, WiMAX, 4G LTE and other advanced communication systems.