scholarly journals Performance Evaluation of Mimo System with Massive Antenna Arrays

2019 ◽  
Vol 8 (10) ◽  
pp. 981-984
Keyword(s):  
Wireless Communication ◽  
Fading Channels ◽  
Antenna Arrays ◽  
Communication System ◽  
Mimo System ◽  
Signal To Noise Ratio ◽  
Phase Error ◽  
High Standard ◽  
Limited Bandwidth ◽  
Wireless Communication System

In the ground of digital word, wireless communication system has widespread functions. The demand for wireless communication is growing day by day. All users want better quality service in scope of wireless communication. Due to high bit error rate (BER), low signal to noise ratio (SNR), limited bandwidth and high standard deviation (SD) of phase error conventional wireless communiqué systems like SISO, SIMO and MISO flops to gather the mounting demand of users. Therefore a new technique MIMO system is realized whose performance is evaluated by parameters BER, SNR and SD of Phase Error. Latest approach for increasing the performance of virtual MIMO communications within peers by ill-treatment situation with giant antenna arrays is developed. MIMO provides low BER and low SD of Phase Error with increased SNR, which forms a good feature for wireless communication system. In this paper, performance of MIMO is assessed under Nakagami-m and Rayleigh fading channels. For a wireless system BER and SD of phase error should be minimum, which is achieved in MIMO system.

SIMULATION OF MIMO CHANNEL OF FIFTH GENERATION NETWORKS IN MATLAB SIMULINK SYSTEM

2019 ◽  
Author(s):  
Viktor Magnitskiy
Keyword(s):  
Wireless Communication ◽  
Antenna Arrays ◽  
Communication System ◽  
Mimo System ◽  
Mimo Channel ◽  
Matlab Simulink ◽  
Wireless Communication System ◽  
Simulink Model ◽  
Fifth Generation

The article describes the Simulink model of the hardware of the MIMO wireless communication system. The model includes a CRC generator, QPSK, OFDM modulator, and antenna arrays at the transmitter and receiver. The presented model makes it possible to simulate the expensive transmit-receive equipment of the MIMO system, and also illustrates the capabilities of Simulink.

Evaluation of inter-aircraft optical wireless communication system with different modulation formats

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Saumya Srivastava ◽  
Kamal Kishor Upadhyay ◽  
Narendra Kumar Shukla
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Signal To Noise Ratio ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Detection Mechanism ◽  
Modulation Formats ◽  
Pointing Error ◽  
Wireless Communication System ◽  
System A

Abstract In this paper, simulative evaluation of the inter-aircraft optical wireless communication system with the use of different modulation formats like return to zero (RZ), non return to zero (NRZ) and raised cosine by signal to noise ratio (SNR) and quality factor (Q-factor). Performance parameters are attenuation level, transmitting pointing error and scintillation are used to analyse the performance of the system. Including the pre- and post-amplifier configuration in the system, a link range of 100 km is achieved at an acceptable bit error rate and the performance of the system is also enhanced at a 5 Gbps data rate as compared to the earlier detection mechanism.

scholarly journals Performance of Convolution and CRC Channel Encoded V-Blast 4x4 MIMO MC-CDMA Wireless Communication System

2021 ◽  
Vol 9 (2) ◽  
pp. 1-6
Author(s):  
Md. Firoz Ahmed ◽  
Md. Tahidul Islam ◽  
Abu Zafor Md. Touhidul Islam
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Signal To Noise Ratio ◽  
Minimum Mean Square Error ◽  
Signal Transmission ◽  
Audio Signal ◽  
Wireless System ◽  
Digital Modulation ◽  
Wireless Communication System ◽  
Encoding Strategies

Wireless communications are among the rapidly growing fields in our current life and have a massive effect on every aspect of our everyday life. In this paper, the performance of the various digital modulation techniques (BPSK, DPSK, QPSK, and QAM) based wireless communication system on the audio signal transmission through the additive Gaussian Noise (AWGN) channel is assessed on the basis of bit error rate (BER) as a function of the signal-to-noise ratio (SNR). Based on the results of this study, BPSK modulation outperforms the DPSK, QPSK, and QAM modulation strategies in the MIMO MC-CDMA VBlast based wireless communication system. The digital modulation of QPSK shows the worst performance in audio signal transmission especially in comparison to other digital modulations. It is clear from the current simulation study based on MATLAB that the V-Blast encoded 4×4 MIMO MC-CDMA wireless system with minimum mean square error (MMSE) signal detection and 1⁄2-rated convolution and cyclic redundancy check (CRC) channel encoding strategies show good performance utilizing BPSK digital modulation in audio signal transmission.

scholarly journals Cooperative beamforming for a double-IRS-assisted wireless communication system

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Guodong Tian ◽  
Rongfang Song
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Communication Systems ◽  
Signal To Noise Ratio ◽  
Pso Algorithm ◽  
Base Station ◽  
Wireless Communication Systems ◽  
Wireless Communication System ◽  
Power Simulation ◽  
Reflecting Surface

AbstractIntelligent reflecting surface (IRS) has emerged as an innovative and disruptive solution to boost the spectral and energy efficiency and enlarge the coverage of wireless communication systems. However, the existing literature on IRS mainly concentrates on wireless communication systems assisted by single or multiple distributed IRSs, which are not always effective. In view of this issue, this paper considers a special double-IRS-assisted wireless communication system, where IRS1 and IRS2 are deployed near the base station (BS) and the user, respectively, and the transmitted signals reach the user via the cascaded BS-IRS1-IRS2-user channel only. We cooperatively optimize transmit and passive beamforming on the two IRSs based on the particle swarm optimization (PSO) algorithm to maximize the received signal power. Simulation indicates that despite no direct line-of-sight (LoS) path from the BS to the user, an excellent signal-to-noise ratio (SNR) is available at the receiver with the aid of two IRSs, which demonstrates that it is feasible to assist communication by double reflection links composed of two IRSs. Additionally, we unexpectedly find that when the positions of the two IRSs are fixed, by exchanging the positions of the BS and the user, the obtainable SNRs are similar.

scholarly journals Millimeter wave patch antenna array for 5G wireless communication systems

2019 ◽  
Vol 27 (2) ◽  
pp. 105-110
Author(s):  
A. B. Gnilenko ◽  
S. V. Plaksin
Keyword(s):  
Wireless Communication ◽  
Antenna Array ◽  
Millimeter Wave ◽  
Antenna Arrays ◽  
Communication System ◽  
Patch Antenna ◽  
Communication Systems ◽  
High Capacity ◽  
Angular Width ◽  
Wireless Communication System

Millimeter waves are now considered as an important part of 5G spectrum. Higher frequencies provide larger bandwidth giving the ability to support very high data rate, ultra high capacity and very low latency. The utilization of millimeter wave frequency bands for 5G mobile applications requires effective solutions in the design of antennas and antenna arrays which are the key parts of modern communication systems. In this paper a 4x4 microstrip patch antenna array sub-module is presented to be a part of 5G wireless communication system. The antenna array is designed and optimized to operate at a frequency of 85 GHz which corresponds to the middle of the second atmospheric transparency window. The antenna array is simulated using the time domain solver of the CST Microwave Studio software package. Simulation results are demonstrated and discussed for an optimized array. The designed patch antenna array provides good directivity characteristics with a main lobe magnitude of 16 dBi, angular width of 28 degree and can be applied as a part of a wireless communication system operating at a high frequency band of 5G frequency range.

scholarly journals Capacity Analysis and Simulations of Distributed Wireless Communication System

2005 ◽  
Vol 1 (1) ◽  
pp. 33
Author(s):  
Xiu Chundi ◽  
Wang Jing
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Mimo System ◽  
Capacity Analysis ◽  
Information Theoretic ◽  
Wireless Communication System ◽  
Shadowing Effect ◽  
Single User ◽  
Capacity Gain ◽  
Distributed Wireless Communication System

The information theoretic capacity of a single user distributed wireless communication system (DWCS) is investigated and compared to that of traditional cellular MIMO system. Simulation results show that, DWCS always outperforms traditional MIMO system, and the capacity gain increase with the incremental number of the fixed antennas. Moreover, the use of distributed antennas in DWCS can average the shadowing effect and solve the near-far problem efficiently.

mmWave MIMO systems for 5G communications

2019 ◽  
Vol 09 ◽  
Author(s):  
Sarala Patchala ◽  
M. Sailaja
Keyword(s):  
Wireless Communication ◽  
Spectral Efficiency ◽  
Communication System ◽  
Mimo Systems ◽  
Mimo System ◽  
Beam Forming ◽  
Next Generation ◽  
Wireless Communication System

: The next generation 5g communications are used with baseband precoders and beam forming. The technology is needed to update the all the available characteristics in the present wireless communication system. In the mmWave MIMO system the number of antenna are increased to improve the spectral efficiency of the system.

scholarly journals Age of Information in an URLLC-enabled Decode-and-Forward Wireless Communication System

2021 ◽  
Author(s):  
chathuranga basnayaka
Keyword(s):  
Wireless Communication ◽  
Fading Channels ◽  
Communication System ◽  
Queuing Theory ◽  
Transportation Systems ◽  
Block Length ◽  
Closed Form Expression ◽  
Wireless Communication System ◽  
The Impact ◽  
Age Of Information

<div>Age of Information (AoI) measures the freshness of data in mission critical Internet-of-Things (IoT) applications i.e., industrial internet, intelligent transportation systems etc. In this paper, a new system model is proposed to estimate the average AoI (AAoI) in an ultra-reliable low latency communication (URLLC) enabled wireless communication system with decodeand- forward relay scheme over the quasi-static Rayleigh block fading channels. Short packet communication scheme is used to meet both reliability and latency requirements of the proposed wireless network. By resorting finite block length information theory, queuing theory and stochastic processes, a closed-form expression for AAoI is obtained. Finally, the impact of the system parameters, such as update generation rate, block length and block length allocation factor on the AAoI are investigated. All results are validated by the numerical results.</div>

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