Minimal Redundancy Linear Array and Uniform Linear Arrays in Future 5G Smart Devices for Machine-to-Machine Talk

Abstract

Minimum redundancy linear arrays (MRLAs) and Uniform linear arrays (ULAs) investigation conducted with the possibility of using them in future 5G smart devices. MRLAs designed to minimize the number of sensor pairs with the same spatially correlated delay. It eliminates selected antennas from the entire composite antenna array and preserves all possible antenna spacing. MRLAs has attractive features for linear sparse arrays, even if the built-in surface is deformed, it works without problems. To our knowledge, MRLAs has not been applied to smart devices so far. In this work, a 7-element ULAs and 4-element MRLAs (same aperture) were used for the simulation. The [[EQUATION]] is 0.666 and the [[EQUATION]] is 1.385 in [[EQUATION]] -space. In comparison, the standard 4-element arrays are 1.429 and 3.1416, while the standard 7-element linear arrays are 0.801 and 1.795 respectively. Experimental results show that 4-element MLRAs has a narrower mean beam, much higher sidelobes and shallow nulls. Therefore, in terms of main lobe features, 4- elements MRLAs has an improvement over the standard 7-element ULAs.