This repository contains solutions to various Python coding challenges from HackerRank. These problems help strengthen my logical thinking, DSA (Data Structures & Algorithms) skills, and Python ...

Abstract: Sparse arrays, such as nested arrays and coprime arrays, can achieve a high number of degrees of freedom (DOFs) for direction of arrival (DOA) estimation with a reduced number of antennas.

Abstract: This paper investigates near-field extremely large-scale multiple-input multiple-output (XL-MIMO) systems with sparse uniform planar arrays (UPAs). Based on the Green’s function-based ...

Prompts the user for a positive integer input (1 <= n) and validates it. The function will continue to prompt the user until a valid input is received.