Comparative Study of Different Antenna Configurations for the MIMOOSTBC Technique Using FEC and the Rayleigh Fading Channel

2020 ◽  
Vol 13 (7) ◽  
pp. 1022-1027
Author(s):  
Gamal M. Alausta
Keyword(s):  
Power Transmission ◽  
Mimo Systems ◽  
Error Correcting Code ◽  
Phase Shift Keying ◽  
Wireless Applications ◽  
High Data ◽  
Rayleigh Channel ◽  
Data Rates ◽  
Shift Keying ◽  
Spatial Domains

Background: Multi-Input Multi-Output (MIMO) systems using Orthogonal Space-Time Block Coding (OSTBC) gained extensive popularity in wireless applications owing to the potential of providing improved reliability. Methods: The performance of MIMO - OSTBC systems using error-correcting code (Convolutional, Reed Solomon and Interleaving) schemes used to encode data streams in wireless communications using the Rayleigh channel is reported here. These are subjected to experimentation under modulation schemes such as Quadrature Phase Shift Keying (QPSK). Decoding occurs using the Maximum Likelihood (ML) algorithm, which provides high data rates using spatial domains under the limits of power transmission and limited bandwidths. Results: Different simulations are performed to detect the best BER performance for various antenna configurations and values of antenna configurations with Error Correction so as to use the best outcomes to model the OSTBC. Conclusion: Their effect of improving the overall can be noticed by the advantages of OSTBC with the correcting codes and the maximum number of configurations.

scholarly journals Performance Analysis of Uncoded and Coded 4XN Space Time Block Coded MIMO System Concatenated with MQAM in Rayleigh Channel

2018 ◽  
Vol 7 (3.13) ◽  
pp. 193
Author(s):  
M H. Belsare ◽  
Dr P. B. Mane
Keyword(s):  
Performance Analysis ◽  
System Performance ◽  
Mimo Systems ◽  
Mimo System ◽  
Time Block ◽  
High Data ◽  
Rayleigh Channel ◽  
Data Rates ◽  
Multiple Input ◽  
Ber Performance

Wireless Communication using Multiple input and multiple output(MIMO) systems are achieving high data rates with increased diversity. This paper presents the performance analysis of half rate convolutionally coded 4x4, 4x3 and 4x2 STBC MIMO system concatenated with MQAM. System performance is analyzed for 4QAM, 8QAM and 16QAM in Rayleigh channel. It is observed that BER performance is better for 4x4 system as compared with other schemes. Results show that BER performances of employed coded 4x4 system is improved over uncoded system in Rayleigh channel. 

scholarly journals GWO Based Optimal Channel Estimation Technique for Large Scale Mimo in LTE Network

2019 ◽  
Vol 8 (12) ◽  
pp. 5306-5314
Keyword(s):  
Channel Estimation ◽  
Spectral Efficiency ◽  
Large Scale ◽  
Performance Metrics ◽  
Mean Squared Error ◽  
Mimo Systems ◽  
Fourth Generation ◽  
High Data ◽  
Data Rates ◽  
High Data Rates

The Wireless Systems Are Employed With More Number Of Antennas For Fulfilling The Demand For High Data Rates. In Telecommunication, Lte-A (Long Term EvolutionAdvanced) Is A Well-Known Technology Intended For Wireless Broadband Communication Aimed At Data Terminals And Mobile Devices. Multiple Input Multiple Output (Mimo) Technology Is Used By Lte Which Is Also Known As Fourth Generation Mobile Networks To Attain Very High Data Rates In Downlink And Uplink Channels. Though The Mimo Systems In Massive Mimo Are Provided By Multiple Antennas, The Design Of The Appropriate Non-Erroneous Detection Algorithm Is A Major Challenge. Also, With The Increase In Quantity Of Antennas, The System's Spectral Efficiency Begins To Degrade. So As To Deal With This Issue, A Proper Algorithm Has To Be Utilized For Channel Estimation. The Bio Inspired Algorithms Have Shown Potential In Handling These Issues In Communication And Signal Processing. So, Grey Wolf Optimization (Gwo) Algorithm Is Used In This Approach To Estimate The Most Optimal Communication Channel. Also, The Spectral Efficiency And Data Capacity Are Enhanced Using The Presented Approach. The Proposed Approach’s Performance Is Compared With The Existing Approaches. The Simulation Result Exposes That The Presented Channel Estimation Approach Is Far Better Than Existing Channel Estimation Approaches In Performance Metrics Such As Bit Error Rate, Minimum Delay, Papr, Spectral Efficiency, Uplink Throughput, Downlink Throughput And Mean-Squared-Error

scholarly journals BER Analysis of Hybrid Precoded Massive MIMO Systems in Downlink with Receiver Beamforming over mmwave Channels

2019 ◽  
Vol 8 (9S) ◽  
pp. 561-566
Keyword(s):  
Massive Mimo ◽  
Mimo Systems ◽  
Wiener Filter ◽  
Error Performance ◽  
Low Snr ◽  
High Data ◽  
Data Rates ◽  
Significant Research ◽  
High Data Rates ◽  
Ber Performance

Next generation networks are required to deliver extremely high data rates in order to enable mission critical services, massive IoT and enhanced mobile broadband. In the pursuit of high data rates, significant research is focused on higher frequency bands. mmWaves are the most promising carriers because of their associated bandwidth benefits. However, on the other hand, mmWaves also bring along difficulties in link management as the channel is totally different from the traditional systems. This paper evaluates the BER performance of mmWave-massive MIMO systems with Hybrid precoding and receiver beamforming. The availability of perfect CSI at both the transmitting and receiving ends of the downlink is assumed. The results demonstrate that BER performance at low SNR region remains almost exclusive of the system dimensions as long as CSI is available. It was observed that almost 20 dB SNR is required to achieve error performance of 10-5 . Zero forcing and Wiener Filter precoder are also evaluated against each other with analog precoding and receiver beamforming

scholarly journals Joint Optimization of Precoder and Decoder in Multiuser MIMO Systems

2012 ◽  
Vol 2 (1-2) ◽  
Author(s):  
M. Raja ◽  
Ha H. Nguyen ◽  
P. Muthuchidambaranathan
Keyword(s):  
Mean Squared Error ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Joint Optimization ◽  
Phase Shift Keying ◽  
Multiuser Mimo ◽  
Multiple Input ◽  
Shift Keying ◽  
Input Multiple Output ◽  
Binary Phase Shift Keying

This paper considers the joint optimization of precoder and decoder for both uplink and downlink transmissions in multiuser multiple-input, multiple-output (MU-MIMO) systems. Focusing on the scenario when an improper constellation such as binary phase shift-keying (BPSK) or M-ary amplitude shift-keying (M-ASK) is employed, novel joint linear precoders and decoders are proposed to minimize the total mean squared error (TMSE) of the symbol estimation. The superiority of the proposed transceivers over the previously-proposed designs is thoroughly verified by simulation results.

scholarly journals Evaluation of IEEE802.15.4g for Environmental Observations

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3468 ◽  
Author(s):  
Jonathan Muñoz ◽  
Tengfei Chang ◽  
Xavier Vilajosana ◽  
Thomas Watteyne
Keyword(s):  
Low Power ◽  
Orthogonal Frequency Division Multiplexing ◽  
Urban Environments ◽  
Radio Link ◽  
Phase Shift Keying ◽  
Smart Meters ◽  
Data Rates ◽  
Reliable Communications ◽  
Shift Keying ◽  
Smart Agriculture

IEEE802.15.4g is a low-power wireless standard initially designed for Smart Utility Networks, i.e., for connecting smart meters. IEEE802.15.4g operates at sub-GHz frequencies to offer 2–3× longer communication range compared to its 2.4 GHz counterpart. Although the standard offers 3 PHYs (Frequncy Shift Keying, Orthogonal Frequency Division Multiplexing and Offset-Quadrature Phase Shift Keying) with numerous configurations, 2-FSK at 50 kbps is the mandatory and most prevalent radio setting used. This article looks at whether IEEE802.15.4g can be used to provide connectivity for outdoor deployments. We conduct range measurements using the totality of the standard (all modulations with all further parametrization) in the 863–870 MHz band, within four scenarios which we believe cover most low-power wireless outdoor applications: line of sight, smart agriculture, urban canyon, and smart metering. We show that there are radio settings that outperform the “2-FSK at 50 kbps” base setting in terms of range, throughput and reliability. Results show that highly reliable communications with data rates up to 800 kbps can be achieved in urban environments at 540 m between nodes, and the longest useful radio link is obtained at 779 m. We discuss how IEEE802.15.4g can be used for outdoor operation, and reduce the number of repeater nodes that need to be placed compared to a 2.4 GHz solution.

scholarly journals An Unbalanced QPSK-Based Integrated Communication-Ranging System for Distributed Spacecraft Networking

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5803
Author(s):  
Na Zhao ◽  
Qing Chang ◽  
Hao Wang ◽  
Zhibo Zhang
Keyword(s):  
Phase Shift ◽  
Spread Spectrum ◽  
Power Distribution ◽  
Satellite System ◽  
Data Rate ◽  
Phase Shift Keying ◽  
Distribution Factor ◽  
High Data ◽  
Shift Keying ◽  
Integrated Communication

The spacecraft tracking telemetering and command (TT&C) system plays an essential role in celestial and terrestrial networks, requiring relative ranging and communication, particularly in satellite formation flying networks and distributed spacecraft networks. To achieve precious ranging and high-data-rate communication in a Master/Slave satellite architecture, an integrated communication-ranging system (ICRS) is introduced. ICRS is based on the inter-satellite spread spectrum ranging and spread/non-spread spectrum communication modulated by unbalanced quadrature phase shift keying (UQPSK). In both uplink and downlink, the in-phase (I) branches and the quadrature (Q) branches undertake the tasks of ranging and communication, respectively. In addition, a global navigation satellite system (GNSS) like signal is adopted in I branches for the sake of better ranging accuracy, and binary phase shift keying (BPSK) modulation is employed in Q branches for a higher data rate. Therefore, the key point of the ICRS design is the power resource allocation between two branches via the selection of a suitable power distribution factor (PWDF). Simulation results demonstrate the good performance of the proposed approach in ranging error and bit error rate (BER). In addition, a reasonable PWDF is recommended. Furthermore, the influence of clock offset is also taken into consideration.

Error rate performance analysis of power domain NOMA over AWGN and fading channels with generalized space shift keying in wireless 5G

2020 ◽  
pp. 1-6
Author(s):  
K. Murali ◽  
S. Siva Perumal
Keyword(s):  
Performance Analysis ◽  
Phase Shift ◽  
Fading Channels ◽  
Error Rate ◽  
Phase Shift Keying ◽  
High Data ◽  
Power Domain ◽  
Shift Keying ◽  
Reliability And Robustness ◽  
The Impact

The Non-Orthogonal Multiple Access (NOMA) emerged as a latest solution to demand of high data rated with excellent reliability and robustness. In this paper, the performance analysis of the NOMA under fading channel is presented with emphasis on error rate calculations. In addition, the focus is on exploring the impact of various modulation techniques like binary phase shift keying (BPSK), Quadrature Phase Shift Keying (QPSK) and Generalized Space Shift Keying (GSSK). The simulation study has been performed on MATLAB tool and results are analyzed efficiently in the metrics of NOMA.

60 GHz WLAN applications and implementation aspects

2011 ◽  
Vol 3 (2) ◽  
pp. 213-221 ◽  
Author(s):  
Benedikt Schulte ◽  
Michael Peter ◽  
Robert Felbecker ◽  
Wilhelm Keusgen ◽  
Rainer Steffen ◽  
...  
Keyword(s):  
60 Ghz ◽  
Wireless Applications ◽  
High Data ◽  
Passenger Seat ◽  
Data Rates ◽  
Connection System ◽  
System Requirements ◽  
Implementation Aspects ◽  
Point To Point ◽  
Key Aspects

Various wireless applications are currently under development for the unlicensed 60 GHz band. This paper describes three examples with different system requirements. The first two are point-to-multipoint wireless networks (in an airplane and in a car) and the third one is a short range point-to-point connection. Special requirements of the applications are a high number of users for the point-to-multipoint connection and a high data rate of 10 Gbit/s for the point-to-point connection system. Implementation aspects are pointed out, which are important to demonstrate the functionality of the system in a relevant environment and are key aspects to develop the related products. For example, integration aspects of the antenna into an airplane passenger seat and the receiver concept of the radio frequency-(RF) front-end to reducing the power consumption at ultrahigh data rates are described. Additionally, to determine the geometrical system architecture, ray-tracing simulations inside an aircraft and inside a car were performed.

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