Enhancement of K-Best Sphere Detection algorithm Performance in MIMO Systems

Abstract

Due to the rapid development of our life toward a life with high-quality communication systems, which require large data rates for transfer such as Long Term Evolution (LTE), Worldwide Interoperability for Microwave Access(WiMAX), and Wireless Fidelity (WiFi) which use Multiple Input - Multiple Output (MIMO) systems. Therefore, become necessary to interest in MIMO system parts especially the MIMO detector (MIMOD). A good detector system must have two important goals, low Computational Complexity (CC) and good Symbol Error Rate (SER) performance). To achieve that two important goals, our work divided into two parts. The first part, by using an unequal power transmission (UEPT) scheme in instead of equal power transmission (EPT) scheme to get a good SER. The second part, how to reduced CC, this achieved by changing the Euclidean Distance (ED) by using Manhattan Distance (MD). The simulation results show us a slight improvement in the SER performance of about 1.1 dB as average gain and a good reduction in CC about 24% as average reduction in visited nodes when using the UEPT with MD against using EPT with ED.

Reduction of Large Scale Linear Dynamic MIMO Systems Using ACO-PID Controller

“…In this regard, largescale systems with multiple inputs and multiple outputs (LS-MIMO) are a promising technology that supports a broad notch of the data for multiple concurrent users, along with the ability to increase spectral efficiency. Furthermore, high-order MIMO can considerably improve the dependability and security of communication systems, obtaining extraordinary locative multiplexing gains, unlike restricted range systems Ouyang and Yang (2018); Sulttan (2019); Han et al (2020); Yang et al (2020); Dang et al (2021). Moreover, by increasing the physical antenna size, many intrinsic advantages can be exploited, e.g., channel hardening and increased cell coverage, area, and throughput.…”

Performance enhancement of large-scale linear dynamic MIMO systems using GWO-PID controller

“…It is worth mentioning that for point-to-point channels, the complexity concerning the receiver side has more significant than that of the transmitter side, For instance, the complexity grows exponentially as the number of antenna increases on the transmitter side. While for the MIMO scenario, besides the receiver side, a great concern is paid to the transmitter aspect since the propagating signal needs to deliver to more than one user simultaneously [5]- [8].…”

Design and implementation of a stability control system for TCP/AQM network

“…The increase in data circulating on the Internet and the increase in the number of Internet users has made the network more congested [1][2][3]. Among the problems that researchers work in the field of Internet use, such as buffer overflow for intermediate vectors, loss of packets and time delay in the delivery of packets [4][5][6].…”