scholarly journals Improved hybrid inter and intra-cell interference cancellation mechanism for LTE-A HETNETS

2018 ◽  
Vol 7 (3) ◽  
pp. 1381 ◽  
Author(s):  
Shibu S ◽  
Saminadan V
Keyword(s):  
Spectral Efficiency ◽  
Interference Cancellation ◽  
Network Performance ◽  
Low Cost ◽  
Least Square ◽  
Energy Aware ◽  
Heavy Load ◽  
Light Load ◽  
Simulation Results ◽  
The Impact

In Heterogeneous networks (HetNets), operators need to ensure reliable service to their users in terms of network performance and low cost. The growing demand of user traffic necessitates the incorporation of femto cells and pico cells for facilitating seamless services. The network performance of Long Term Evolution (LTE) and LTE Advanced (LTE-A) HetNets is drastically influenced by the degree of interference that is realized in the inter-cell and intra-cell during communication. In this paper, an Improved Hybrid inter and intra-cell interference cancellation mechanism (CRS-IIC-LFLS) is propounded for handling interference at the inter and intra-cell level. Inter-cell interference cancellation is achieved through the use of an Improved CRS-IIC algorithm that uses the benefits of Linear Filtering Least Square (LFLS) method for channel estimation. CRS-IIC-LFLS is found to potent in rapid interference cancellation facilitation by suppressing the noise level, reducing the impact of fading channel and inherently eliminates small energy aware paths from large energy aware paths. The Simulation results confirm that the proposed scheme ensures better network throughput under light load, medium load and heavy load conditions of the network. The results prove that the performance of CRS-IIC-LFLS with CRS-IC-LFLS and CRS-IC-LLS based on spectral efficiency is improved at a mean rate of 21% and 26% respectively. The simulation results also portrays that the increase in the spectral efficiency of CRS-IIC-LFLS (64-QAM) is phenomenal to a maximum improvement of 12% over CRS-IIC-LFLS (16-QAM).  

GPS Cross Correlation Mitigation Technique in Multipath Environment

2010 ◽  
Vol 439-440 ◽  
pp. 715-720
Author(s):  
Jun Yao Gao ◽  
Jing Shu Yang ◽  
Jia Zhao
Keyword(s):  
Interference Cancellation ◽  
Cross Correlation ◽  
Parallel Interference Cancellation ◽  
Multipath Environment ◽  
Simulation Results ◽  
The Cross ◽  
The Impact ◽  
Mitigation Technique

The paper investigates the cross correlation mitigation (CCM) technique in the multipath propagating environment. It analyses the impact of cross correlation firstly, then expounds the universal technique in CCM, at last presents an improved DPIC (Delayed Parallel Interference Cancellation) method based on MEDLL. The algorithm estimates the parameters of multipath by using MEDLL, reconstructs the strong signals IF utilizing these parameters, and mitigates the cross correlation with the aid of DPIC method. At last, simulation results prove the validity of this method.

scholarly journals How To Build Customer Loyalty: Through Customer Experience, Perceived Price, And Customer Satisfaction

2021 ◽  
Vol 12 (4) ◽  
pp. 1546-1554
Author(s):  
Edhie Budi Setiawan, Et. al.
Keyword(s):  
Customer Satisfaction ◽  
Customer Loyalty ◽  
Structural Equation ◽  
Low Cost ◽  
Least Square Method ◽  
Customer Experience ◽  
Partial Least Square ◽  
Least Square ◽  
Perceived Price ◽  
The Impact

The competition to get the highest Market Share among Low-Cost Carrier airlines in Indonesia is getting fierce. Airlines are competing to offer prices that are appropriate for passengers to perceive them in this era of tariff wars. The degree of satisfaction that is felt is needed to get loyal customers. The purpose of this research is to analyze the impact of customer experience and perceived price on customer loyalty through customer satisfaction. The method of analysis in this study uses the SEM-PLS (Structural Equation Model - Partial Least Square) method with 250 respondents taken by purposive sampling. The result of this research is there is effect positive and significant between customer experience on customer satisfaction and customer loyalty, also there is effect of perceived price on customer satisfaction and customer loyalty. Airlines must pay attention to the services provided to create a memorable experience for passengers and adjust prices to be accepted by passengers.

scholarly journals On the Trade-Off between Energy Efficiency and Spectral Efficiency in RIS-Aided Multi-User MISO Downlink

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1307
Author(s):  
Meng Zhang ◽  
Le Tan ◽  
Kelin Huang ◽  
Li You
Keyword(s):  
Energy Efficiency ◽  
Spectral Efficiency ◽  
Low Cost ◽  
Base Station ◽  
Trade Off ◽  
Optimization Framework ◽  
Single Output ◽  
Multiple Input ◽  
Fast Convergence Rate ◽  
Simulation Results

As reconfigurable intelligent surfaces (RISs) have been gradually brought to reality, a large amount of research has been conducted to investigate the immense benefits of RISs. That is because RISs enable us to artificially direct the radio wave propagating through the environment at a relatively low cost. This paper investigates the trade-off between spectral efficiency (SE) and energy efficiency (EE) in the RIS-aided multi-user multiple-input single-output downlink. We develop an optimization framework for designing the transmitting precoding at the base station and the phase shift values at the RIS to balance the EE-SE trade-off. The proposed iterative optimization framework for the design includes quadratic transform, alternating optimization, and weighted minimization mean-square error conversion. Simulation results illustrate our optimization framework algorithm exhibits effectiveness and a fast convergence rate.

An Improved Frequency Agility Mechanism for SimpliciTI Protocol

2014 ◽  
Vol 543-547 ◽  
pp. 3486-3489 ◽  
Author(s):  
Jun Qiang Wang ◽  
Jing Wu
Keyword(s):  
Low Power ◽  
Low Cost ◽  
Sensor Nodes ◽  
Channel Migration ◽  
Development Cycle ◽  
Short Development Cycle ◽  
Specific Frequency ◽  
Simulation Results ◽  
The Impact ◽  
Better Than

The rapid growth of application for low-cost, low power sensor nodes based on WSN brings its own challenges. SimpliciTI is a simple low-power RF network protocol that with open Source, flexibility, and low-cost, short development cycle and so on. Aiming at the blindness problem of channel migration when this specific frequency is noisy, We presented PSCP-FA(periodic synchronism and channel prediction Frequency agility) which accomplish the channel agility predictable. Furthermore, we evaluated the impact of energy of efficiency compared with S-MAC and FA. Our simulation results show that PSCP-FA performs better than S-MAC and FA.

scholarly journals Densely Deployed Indoor Massive MIMO Experiment: From Small Cells to Spectrum Sharing to Cooperation

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4346
Author(s):  
Andrea P. Guevara ◽  
Sofie Pollin
Keyword(s):  
Spectral Efficiency ◽  
Interference Cancellation ◽  
Massive Mimo ◽  
Spectrum Sharing ◽  
Interference Suppression ◽  
Computational Cost ◽  
Small Cells ◽  
Optimal Capacity ◽  
High Spectral Efficiency ◽  
The Impact

Massive MIMO is a key 5G technology that achieves high spectral efficiency and capacity by significantly increasing the number of antennas per cell. Furthermore, due to precoding, massive MIMO allows co-channel interference cancellation across cells. In this work, based on experimental channel data for an indoor scenario, we analyse the impact of inter and intra-cell interference suppression in terms of spectral efficiency, capacity, user fairness and computational cost for three simulated systems under different cooperation levels. The first scenario assumes a cooperative case where eight neighbouring cells share the spectrum and infrastructure. This scenario provides the highest system performance; however, user fairness is achieved only when there is inter and intra-cell interference suppression. The second scenario considers eight cells that only share the spectrum; with full intra-cell and inter-cell interference cancellation, it is possible to achieve 32% of the optimal capacity with 20% of the computational cost in each distributed CPU, although the total computational cost per system is the highest. The third scenario considers eight independent cells operating in different frequency bands; in this case, intra-cell interference suppression leads to higher spectral efficiency compared to the cooperative case without intra-cell interference suppression.

Multidimensional Analysis of LTE Network Rollout With Typical and Non-Typical Antenna Configurations

2019 ◽  
pp. 97-135
Author(s):  
Muhammad Usman Sheikh ◽  
Jukka Lempiainen ◽  
Riku Jantti
Keyword(s):  
Spectral Efficiency ◽  
Power Efficiency ◽  
Network Performance ◽  
Higher Order ◽  
Point Of View ◽  
Multidimensional Analysis ◽  
System Capacity ◽  
Network Quality ◽  
Antenna Configuration ◽  
The Impact

Higher order sectorization and the site densification are the two renowned solutions for the cellular system capacity crunch. However, in order to take adequate benefits of these techniques they should be implemented with optimal antenna configuration. This chapter highlights the gain of using an optimized antenna configuration for three- and six-sector sites in achieving a better network coverage and network quality (i.e., capacity). Unlike traditional wide 65° HPBW antenna, this chapter also focuses on the use of other narrow HPBW antennas for three- and six-sector sites. This chapter provides detailed analysis of network performance from coverage, capacity, spectral-efficiency, power-efficiency, and cost-efficiency point of view. It also provides a fair comparison between the network rollout with traditional three-sector sites and higher order six-sector sites. Similarly, the impact of site densification along with sector densification is also studied in this chapter.

scholarly journals Heterogeneous networks: Fair power allocation in LTE-A uplink scenarios

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252421
Author(s):  
Reben Kurda
Keyword(s):  
Power Control ◽  
Heterogeneous Networks ◽  
Spectral Efficiency ◽  
Network Performance ◽  
Fractional Power ◽  
Base Station ◽  
Small Cells ◽  
Lte Networks ◽  
Control Approach ◽  
The Impact

Effective management of radio resources and service quality assurance are two of the essential aspects to furnish high-quality service in Long Term Evolution (LTE) networks. Despite the base station involving several ingenious scheduling schemes for resource allocation, the intended outcome might be influenced by the interference, especially in heterogeneous scenarios, where many kinds of small cells can be deployed under the coverage of macrocell area. To develop the network of small cells, it is essential to take into account such boundaries, in particular, mobility, interference and resources scheduling a strategy which assist getting a higher spectral efficiency in anticipate small cells. Another challenge with small cellular network deployment is further analyzing the impact of power control techniques in the uplink direction for the network performance. With that being said, this article investigates the problem of interference in LTE-advanced heterogeneous networks. The proposed scheme allows mitigation inter-cell interference through fractional self-powered control performed at each femtocell user. This study analyzes a scheme with optimum power value that provides a compromise between the served uplink signal within unwanted interference plus noise ratio to enhance spectral efficiency in terms of throughput. In particular, the maximum transmit power for user equipment in uplink direction should be reviewed for small cells as a major contributor to the interference. The simulation results showed that the proposed fractional power control approach can outperform the traditional power control employed as a full compensation mode in small cell uplinks.

scholarly journals EFFECT of DG Optimizing on overload Transmission line Stability

2018 ◽  
Vol 225 ◽  
pp. 03023 ◽  
Author(s):  
Ali Abdullah Ali ◽  
Ahmed N Abdalla ◽  
R. Ishat
Keyword(s):  
Power Systems ◽  
Transmission Line ◽  
System Analysis ◽  
Reactive Power ◽  
Low Voltage ◽  
Heavy Load ◽  
Worst Case ◽  
Light Load ◽  
The Impact ◽  
Load Conditions

Typical steady state studies always treat the peak power demands as the worst case conditions. Periods of light load are also critical in the assessment of the possible state of a power system. While heavy load conditions are generally associated with overload, low voltage and generation deficiency, light load conditions may give rise to over-voltage and undesirable reactive power requirements at generation side. This paper focus on study the effect of DG Optimizing on overload Transmission line Stability. The system dispatch constraints should be taken into account to compensate or varying DG generation output and to enhance the operational performance of power systems. This dispatching operation depends on the change of DG generation and the dispatching strategy. The impact of DG generation uncertainty is limited with the generation dispatching operation and should not be neglected in system analysis.

scholarly journals The influence of application processes on performance reliability

2018 ◽  
Vol 169 ◽  
pp. 01005
Author(s):  
Yue Zhang ◽  
Ning Huang ◽  
Weiqiang Wu ◽  
Shuo Zhang
Keyword(s):  
Significant Influence ◽  
Network Performance ◽  
Flow State ◽  
Application Process ◽  
Network Characteristics ◽  
Upper Limit ◽  
Middle Tier ◽  
Traffic Generation ◽  
Simulation Results ◽  
The Impact

Application process has significant influence on network performance reliability, however, previous studies mainly focus on the impact of network characteristics (such as routing and traffic) on network performance reliability and ignore the influence of application process. In this paper, a multi-tiers model is proposed to capture the process of application. Furthermore, an application paths matrix is proposed to describe all the transmission paths of the application process in the network. Based on the application paths matrix, the boundary of the critical point of the traffic generation rate is derived theoretically, below the lower limit of the boundary the network stays in free-flow state and is reliable, while above the upper limit of the boundary the congestion occurs and the network performance reliability decreases. Furthermore, the effect of the boundary is verified in numerical simulations. The simulation results also show that congestions occurred in middle-tier host nodes could bring more influence on the network performance reliability.

Study on the Impact of Distributed Generation on Distribution Power Losses

2014 ◽  
Vol 960-961 ◽  
pp. 1460-1464
Author(s):  
Hao Jie Shi ◽  
Xing Ying Chen ◽  
Kai Chen ◽  
Jian Liu ◽  
Kun Yu
Keyword(s):  
Distributed Generation ◽  
Power Flow ◽  
Reactive Power ◽  
Power Losses ◽  
Power Flow Calculation ◽  
Heavy Load ◽  
Light Load ◽  
Network Losses ◽  
Compensation Device ◽  
The Impact

The impact of distributed generation (DG) on distribution power losses is closely related to DG technologies and load distribution. DG units are modeled as PQ, PQ(V) and PV nodes in power flow calculation. A revised back/forward power flow method is employed to calculate distribution power flow with various types of DG units. Power losses are computed when different types of DG units are connected to heavy load, general load and light load area apart. Simulation on IEEE 33-bus distribution network shows that connecting DG to heavy load area helps to maximize the loss reduction. And the installation of DG consuming reactive power will increase network losses unless reactive power compensation device is installed accordingly.

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