Smart antenna array processing techniques and implementation of Spatio-temporal sampling and Equality check algorithm

Research and development in smart or adaptiveantenna array is always in progress to estimate direction ofarrival (DOA) accurately and to form the beam in the directionof DOA. This paper presents different temporal and spatial arrayprocessing techniques used for DOA estimation. Temporal classcontains all algorithms which use temporal properties of thedesired signal during the adaptation process. This can be atraining sequence as well as the constant envelope property of thesignal to be received. The antenna weight vectors are directlydetermined from the received signals at the antenna elements andthe temporal signal properties, where no channel estimation isperformed. Temporal processing algorithms include LMS, RLS,SQRLS, DMI, SMI, CMA algorithms. Spatial algorithms useknowledge about the properties of the array manifold todetermine the DOAs of the incident signals. Afterwards theantenna weight vectors are determined and the signals areseparated and further processed by any detector. Spatialprocessing algorithms include MUSIC, ESPRIT, UNITARYESPRIT, SAGE algorithms.In this paper by studying the above method onedifferent method i.e. ‘spatio-temporal sampling and equalitycheck’ method is developed and implemented using MATLABSIMULINK and the performance is checked for differentcombination of input signal and noise signal