Vol.:(0123456789) Wireless Personal Communications (2021) 119:629–637 https://doi.org/10.1007/s11277-021-08227-3 1 3 Performance of MIMO‑UWB for LOS and N‑LOS Propagation Avireni Bhargav 1  · Arun Kumar 2 Accepted: 3 February 2021 / Published online: 13 February 2021 © The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature 2021 Abstract UWB transmits low power capable of working on the low signal to noise ratios. It acts as a jamming resistance whereas its performance is very high in multipath channels. It has a large channel capacity and simple transceiver architecture. Its performance is high even in noisy environments and possesses the least probability of intercepting and detecting capa- bility. UWB is favored for use in driven battery devices. In this work, we have focused to simulate and evaluate the performance of Non-line of sight (N-LOS) BER (0–4 m) multi- ple input and multiple outputs—UWB for line of sight (LOS) and N-LOS conditions using Quadrature Phase shift Keying (QPSK) transmission scheme. The parameters such as error vector magnitude (EVM), bit error rate (BER), signal to noise ratio (SNR), constellation diagram, the spectrum of transmitting and receive signal are discussed and analyzed. Keywords UWB · LOS · N-LOS · MIMO · BER 1 Introduction UWB is operated on several devices with a wireless connection to achieve bandwidth data, audio, and video coming up for display in a modern technical era. It can coexist with wide- band radio services and narrowband whereas it does not cause inter-symbol interference. UWB is an enhanced version that is impossible to detect from unidentifed and unintended users. It is highly secured and has high multipath immunity which consists of LOS and N-LOS of operation. It is a technology for spreading over a large bandwidth by transmitting information which is greater than 500 MHz. The frequency used for UWB is 3.1–10.6 GHz within the band in the center. It has a channel bandwidth of 500 MHz–7.5 GHz and a signaling rate of 110 Mb/s. The number of radio frequency channels is 1–15. The share of frequency occupying the bandwidth of the communication system is estimated at One percent. It is otherwise called radio pulse. Each pulse in a pulse-based ultra band system * Arun Kumar arun.kumar1986@live.com Avireni Bhargav avirenibhargav@ieee.org 1 Department of IT and Engineering, La Trobe University, Melbourne, Bundoora, VIC 3086, Australia 2 Department of ECE, JECRC University, Jaipur 303905, India