Reference Signal based Beamforming vis-à-vis Null Steering based Beamforming on the basis of a Rectangular Antenna Array

  • Robert Macharia Jomo Kenyatta University of Agriculture & Technology
  • Peter Kihato Jomo Kenyatta University of Agriculture & Technology
  • kibet Langat Jomo Kenyatta University of Agriculture & Technology

Abstract

Smart antennas optimize radiation/ reception patterns (beamforming) in accordance to particular approaches. The commonapproaches utilized include beam-steering, null-steering, reference signal based approaches and statistical blind approaches. Null and beam steering criterions are viable in situations in which desired maximal and minimal radiation directions are known. Reference signal criterions are viable in situations in which a signal known at both ends of a wireless link is present. Some situations involve the presence of all requisite information as far as null-steering and reference signal based beamforming approaches are concerned. This paper takes a look into such a scenario, comparing the viability of either of the two approaches. A rectangular antenna array is utilized in reception mode. Situations featuring a single desired reception direction and four interferer directions are considered. Reception beamforming is done on the basis ofthe null-steering and reference signal based approaches separately. Particle Swarm Optimization (PSO) algorithm is utilized in solving the two beamforming approaches. The resultant reception patterns and the correlation values between the beamformed signal and the expected signal are used as performance measures. The reference signal based beamforming approach is found better than the null steering based approach on the basis of the utilized performance measures
Published
Jun 13, 2016
How to Cite
MACHARIA, Robert; KIHATO, Peter; LANGAT, kibet. Reference Signal based Beamforming vis-à-vis Null Steering based Beamforming on the basis of a Rectangular Antenna Array. Proceedings of Sustainable Research and Innovation Conference, [S.l.], p. 218-224, june 2016. ISSN 2079-6226. Available at: <http://sri.jkuat.ac.ke/ojs/index.php/proceedings/article/view/431>. Date accessed: 23 sep. 2017.

Keywords

Smart antenna, Rectangular antenna array; Beamforming; Reference signal; Beam/ null steering