Log in

Relevant bibliographies by topics / Time division duplex TDD / Journal articles

To see the other types of publications on this topic, follow the link: Time division duplex TDD.

Journal articles on the topic 'Time division duplex TDD'

Author: Grafiati

Published: 28 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Time division duplex TDD.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Mamane, Asmae, Mohammed Fattah, Mohammed El Ghazi, and Moulhime El Bekkali. "5G Enhanced Mobile Broadband (eMBB): Evaluation of Scheduling Algorithms Performances for Time-Division Duplex Mode." International Journal of Interactive Mobile Technologies (iJIM) 16, no. 01 (2022): 120–31. http://dx.doi.org/10.3991/ijim.v16i01.25941.

Full text

Abstract:

5G mobile communications introduce novel solutions to overcome the frequency spectrum’s shortage. It broadens the spectrum band to millimeter-waves, employs multiple numerologies to calculate subcarrier spacing, and supports various division duplex modes. Furthermore, the fifth generation of mobile networks intends to employ both, frequency division duplex, and time division duplex. This study focuses on Time Division Duplex (TDD) mode. Compared to the Frequency Division Duplex (FDD), the time duplex mode enhances flexibility and allows efficient frequency spectrum usage. However, the recent p

APA, Harvard, Vancouver, ISO, and other styles

2

Zhu, Yue, Jiamin Li, Pengcheng Zhu, Dongming Wang, and Xiaohu You. "Network-Assisted Full-Duplex Enabled Ultrareliable and Low-Latency Communications." Wireless Communications and Mobile Computing 2022 (October 14, 2022): 1–12. http://dx.doi.org/10.1155/2022/2233503.

Full text

Abstract:

The ultrareliable and low-latency communication (URLLC) is one of the key scenarios of the current 5G new radio (NR). The performance of the duplex technologies in URLLC to assist in meeting the needs of low-latency services is of great significance. However, time division duplex (TDD) has poor delay performance due to the extra data waiting delay caused by the frequent uplink/downlink switching. Besides, TDD systems cannot dynamically adapt to the real-time changes of user requirements due to the problem of frame structure configuration, while frequency division duplex (FDD) has more pilot ov

APA, Harvard, Vancouver, ISO, and other styles

3

K.Venkatesh, G., and P. V.Rao. "Performance analysis of a novel method for fast handovers in TDD and FDD for long term evolution." International Journal of Engineering & Technology 7, no. 1.9 (2018): 115. http://dx.doi.org/10.14419/ijet.v7i1.9.9745.

Full text

Abstract:

The LTE Long Term Evolution highly developed Technology, Handover is the essential function of the mobility of user in cellular networks in Time Division Duplex as well as Frequency Division Duplex. Handover is one of the essential that can affect the [QoS] Quality of Service with Capacity of Mobile Broadband Networks. Within mobile cellular network communication systems, a (spectrum) limited shared resource needs to be shared with all the users, so full duplex communication is achieved. This paper involves studying diverse Hand over delay parameters and also focus on reducing “Hard Handover d

APA, Harvard, Vancouver, ISO, and other styles

4

Al-awadi, Aws Majeed, and Mohammed Jawad Al-dujaili. "Simulation of LTE-TDD in the HAPS channel." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 3152. http://dx.doi.org/10.11591/ijece.v10i3.pp3152-3157.

Full text

Abstract:

LTE stands for Long Term Evolution. This technology enhances the data rate and capacity using a new radio interface and an optimized core network. This progress was done to satisfy standards defined for the fourth generation of cellular communications in ITU. LTE has two types of transmission: Frequency Division Duplex (FDD) and Time Division Duplex (TDD). Nowadays, LTE-TDD rapidly Grows and takes place of old fixed cellular communications, like WiMAX. Another upcoming technology in the communication industry is High Amplitude Platform Stations (HAPS). Studying the capability of HAPS as a base

APA, Harvard, Vancouver, ISO, and other styles

5

Aws, Majeed Al_Awadi, and Jawad Al_Dujaili Mohammed. "Simulation of LTE-TDD in the HAPS channel." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 3152–57. https://doi.org/10.11591/ijece.v10i3.pp3152-3157.

Full text

Abstract:

LTE stands for Long Term Evolution. This technology enhances the data rate and capacity using a new radio interface and an optimized core network. This progress was done to satisfy standards defined for the fourth generation of cellular communications in ITU. LTE has two types of transmission: Frequency Division Duplex (FDD) and Time Division Duplex (TDD). Nowadays, LTE-TDD rapidly Grows and takes place of old fixed cellular communications, like WiMAX. Another upcoming technology in the communication industry is High Amplitude Platform Stations (HAPS). Studying the capability of HAPS as a base

APA, Harvard, Vancouver, ISO, and other styles

6

Chandra, Dikky, Sri Yusnita, Dana Bahari Sitepu, Rusfandi, and Dwiny Meidelfi. "The Analysis of Service Integrity on Video Streaming Services Using Time Division Duplex and Frequency Division Duplex Technology on LTE Networks." International Journal of Advanced Science Computing and Engineering 3, no. 2 (2021): 73–87. http://dx.doi.org/10.30630/ijasce.3.2.65.

Full text

Abstract:

The growing use of cellular technology has a rapid impact on the development of technology and information. This development relates to the use of information and communication services that is tailored directly, practically and effectively manner. Responding to the issue, the researcher is interested in conducting research by looking at the parameters using Time Division Duplex (TDD) technology and Frequency Division Duplex (FDD) technology on video streaming services. Service integrity measurement results on LTE networks are carried out in real time in the field according to the research pat

APA, Harvard, Vancouver, ISO, and other styles

7

Chandra, Dikky, Sri Yusnita, Dana Bahari Sitepu, Rusfandi, and Dwiny Meidelfi. "The Analysis of Service Integrity on Video Streaming Services Using Time Division Duplex and Frequency Division Duplex Technology on LTE Networks." International Journal of Advanced Science Computing and Engineering 3, no. 2 (2021): 73–87. http://dx.doi.org/10.62527/ijasce.3.2.65.

Full text

Abstract:

The growing use of cellular technology has a rapid impact on the development of technology and information. This development relates to the use of information and communication services that is tailored directly, practically and effectively manner. Responding to the issue, the researcher is interested in conducting research by looking at the parameters using Time Division Duplex (TDD) technology and Frequency Division Duplex (FDD) technology on video streaming services. Service integrity measurement results on LTE networks are carried out in real time in the field according to the research pat

APA, Harvard, Vancouver, ISO, and other styles

8

Chen, Xiangyu, Gang Chuai, and Weidong Gao. "Multi-Agent Reinforcement Learning Based Fully Decentralized Dynamic Time Division Configuration for 5G and B5G Network." Sensors 22, no. 5 (2022): 1746. http://dx.doi.org/10.3390/s22051746.

Full text

Abstract:

Future network services must adapt to the highly dynamic uplink and downlink traffic. To fulfill this requirement, the 3rd Generation Partnership Project (3GPP) proposed dynamic time division duplex (D-TDD) technology in Long Term Evolution (LTE) Release 11. Afterward, the 3GPP RAN#86 meeting clarified that 5G NR needs to support dynamic adjustment of the duplex pattern (transmission direction) in the time domain. Although 5G NR provides a more flexible duplex pattern, how to configure an effective duplex pattern according to services traffic is still an open research area. In this research, w

APA, Harvard, Vancouver, ISO, and other styles

9

Sulaeman, Enceng, Yaya Sulaeman, and Asep Yudi Hercuadi. "Desain dan Implementasi Duplekser dengan Metoda Pseudo-Interdigital untuk Uplink dan Downlink LTE." Jurnal Elektronika dan Telekomunikasi 13, no. 2 (2016): 73. http://dx.doi.org/10.14203/jet.v13.73-80.

Full text

Abstract:

Duplekser merupakan perangkat yang dapat mengisolasi receiver dari transmitter saat keduanya saling berbagi antena yang sama, digunakan agar komunikasi bisa berjalan secara full duplex. Ada dua metode transmisi duplex yaitu frequency division duplex (FDD) dan time division duplex (TDD). FDD merupakan teknik duplex yang menggunakan dua frekuensi yang berbeda untuk melakukan komunikasi dalam dua arah, sedangkan TDD menggunakan frekuensi tunggal dan frekuensi tersebut digunakan oleh semua kanal untuk melakukan pengiriman dan penerimaan data. Gabungan dua bandpass filter dengan metoda pseudo-inter

APA, Harvard, Vancouver, ISO, and other styles

10

Peng, Xidan, and Xiangyang Li. "Performance Analysis for Analog Network Coding with Imperfect CSI in FDD Two Way Channels." Journal of Systems Science and Information 3, no. 4 (2015): 357–64. http://dx.doi.org/10.1515/jssi-2015-0357.

Full text

Abstract:

AbstractA time-division duplex (TDD) two-way channel exploits reciprocity to estimate the forward channel gain from the reverse link. Many previous works explore outage probabilities in the TDD system, based on the reciprocity property. However, a frequency-division duplex (FDD) system has no reciprocity property. In this letter, we investigate the impact of CSI estimation error on the performance of non-orthogonal and orthogonal analog network coding protocols in an FDD two-way system, where channel gains are independent of each other. Considering imperfect CSI, the closed-form expressions of

APA, Harvard, Vancouver, ISO, and other styles

11

Praise, Igochi Onu, and Akande Ahmed Wasiu. "A Comparative Study of Cross-Link Interference Mitigation Schemes for Dynamic-Time Division Duplex (D-TDD) Network." Journal of Advancement in Communication System 7, no. 2 (2024): 1–15. https://doi.org/10.5281/zenodo.10910457.

Full text

Abstract:

<em>In 5G network, Dynamic-Time Division Duplex (D-TDD) enables flexible resource allocation for uplink and downlink in real time according to traffic demands. Nevertheless, it may result in severe cross-link interference (CLI) that impairs performance due to disorganized transmissions in nearby cells. In order to mitigate CLI in 5G D-TDD networks, this paper compares several promising techniques, including beamforming, dynamic uplink/downlink configuration, enhanced inter-cell interference coordination (eICIC), power control, and cell clustering. For every scheme, the trade-offs between overh

APA, Harvard, Vancouver, ISO, and other styles

12

Chandra, Dikky, Sri Yusnita, Dana Bahari Sitepu, Arif Mursydan, and Dwiny Meidelfi. "LTE Network Area Coverage on FDD and TDD Technology." International Journal of Advanced Science Computing and Engineering 2, no. 1 (2020): 21–33. http://dx.doi.org/10.30630/ijasce.2.1.47.

Full text

Abstract:

FDD (Frequency Division Duplexing) and TDD (Time Division Duplexing) Technology I is a duplex technology on the 4G LTE network. FDD technology in Indonesia is deployed in the 900 MHz, 1800 MHz and 2100 MHz frequency bands. Meanwhile, TDD technology uses frequency of 2300 MHz. In order to see the performance from the side of coverage, a measurement of the signal strength is conducted by direct measurements in field so that the appropriate technology and frequency band can be determined for the measurement area. The measurements have been done by two samples of different frequencies, namely 1800

APA, Harvard, Vancouver, ISO, and other styles

13

Chandra, Dikky, Sri Yusnita, Dana Bahari Sitepu, Arif Mursydan, and Dwiny Meidelfi. "LTE Network Area Coverage on FDD and TDD Technology." International Journal of Advanced Science Computing and Engineering 2, no. 1 (2020): 21–33. http://dx.doi.org/10.62527/ijasce.2.1.47.

Full text

Abstract:

FDD (Frequency Division Duplexing) and TDD (Time Division Duplexing) Technology I is a duplex technology on the 4G LTE network. FDD technology in Indonesia is deployed in the 900 MHz, 1800 MHz and 2100 MHz frequency bands. Meanwhile, TDD technology uses frequency of 2300 MHz. In order to see the performance from the side of coverage, a measurement of the signal strength is conducted by direct measurements in field so that the appropriate technology and frequency band can be determined for the measurement area. The measurements have been done by two samples of different frequencies, namely 1800

APA, Harvard, Vancouver, ISO, and other styles

14

Kalidoss, R., M. A. Bhagyaveni, and K. S. Vishvaksenan. "A Location-Based Duplex Scheme for Cost Effective Rural Broadband Connectivity Using IEEE 802.22 Cognitive Radio Based Wireless Regional Area Networks." Fluctuation and Noise Letters 13, no. 04 (2014): 1450028. http://dx.doi.org/10.1142/s021947751450028x.

Full text

Abstract:

The search for a method of utilizing the scarce spectrum in an efficient manner is an active area of research in both academic and industrial communities. IEEE 802.22 is a standard for wireless regional area network (WRAN) based on cognitive radio (CR) that operates over underutilized portions of TV bands (54–862 MHz). Time division duplex (TDD)-based WRAN cells have such advantages as dynamic traffic allocation, traffic asymmetry to users and ease of spectrum allocation. However, these cells suffer from severe cross time slot (CTS) interference when the frames of the cells are not synchronize

APA, Harvard, Vancouver, ISO, and other styles

15

Hassan, Ahmad, Shivang Aggarwal, Mohamed Ibrahim, Puneet Sharma, and Feng Qian. "Wixor: Dynamic TDD Policy Adaptation for 5G/xG Networks." Proceedings of the ACM on Networking 2, CoNEXT4 (2024): 1–24. http://dx.doi.org/10.1145/3696395.

Full text

Abstract:

In the era of 5G and beyond, dynamic Time Division Duplex (TDD) has become essential for supporting applications that demand high bandwidth and low latency. Emerging uplink-intensive use cases such as real-time video analytics, autonomous vehicles and augmented reality further complicate the balance between uplink and downlink resources. Despite their potential, TDD policies employed by current 5G networks remain underexplored. Our investigation reveals that existing TDD policies are static and predominantly downlink-focused, failing to adapt to fluctuating network demands. We introduce Wixor,

APA, Harvard, Vancouver, ISO, and other styles

16

Astuti, Rini. "Analisa Metode Pengalokasian Time Slot pada Jaringan Time Division Duplex." Jurnal Komputer dan Elektro Sains 3, no. 1 (2025): 23–27. https://doi.org/10.58291/komets.v3i1.284.

Full text

Abstract:

Perkembangan komunikasi bergerak sudah sangat maju teknologi. Tujuan perkembangan jaringan komunikasi bergerak adalah menyediakan standar yang dapat memenuhi aplikasi-aplikasi nirkabel yang luas variasinya, tidak hanya mampu menyediakan jenis layanan dasar seperti suara (voice) dan pesan (messaging) saja melainkan telah diperluas hingga mampu menyediakan jenis layanan multimedia dan high multimedia. Salah satu karakter layanan multimedia dan high multimedia adalah sifat keasimetrisan dari sisi trafiknya, sehingga kebutuhan data rate pada arah downlink berbeda dengan kebutuhan data rate pada ar

APA, Harvard, Vancouver, ISO, and other styles

17

Zeydan, Engin, Omer Dedeoglu, and Yekta Turk. "Experimental Evaluations of TDD-Based Massive MIMO Deployment for Mobile Network Operators." IEEE Access 8 (February 1, 2020): 33202–14. https://doi.org/10.1109/ACCESS.2020.2974277.

Full text

Abstract:

Massive Multiple Input Multiple Output (MIMO) is an essential component for future wireless cellular networks. One of its biggest advantages is to use the 5G spectrum more intelligently by extending both coverage (via high gain adaptive beamforming) and capacity (via high order spatial multiplexing). In this paper, we evaluate the performance of Time-division duplex (TDD)-based massive MIMO deployment scenario in one of the commercial sites in Turkey. Our experimental results reveal three major contributions: (i) TDD-based massive MIMO in 10 Mhz reveals up to 212% and 50% higher cell throughpu

APA, Harvard, Vancouver, ISO, and other styles

18

Zeydan, Engin, Omer Dedeoglu, and Yekta Turk. "Performance Comparisons of FDD MIMO and 2.6 GHz TDD Massive MIMO: An Experimental Analysis." Physical Communication 46 (June 1, 2021): 101341. https://doi.org/10.1016/j.phycom.2021.101341.

Full text

Abstract:

Massive multiple-input multiple-output (MIMO) is considered as a breakthrough technology in 5G and beyond 5G systems. Some of its main advantages are providing high spectral efficiency to many users simultaneously in the same timefrequency blocks, strong directive signals towards short-range areas and little interference leaks. However, while massive MIMO exhibits interesting benefits, it is important to investigate its main gains through real deployment scenarios in an operator’s infrastructure. In this paper, we focus on performance comparisons of traditional frequency-division duplex

APA, Harvard, Vancouver, ISO, and other styles

19

Oh, Jeong-Eun, A.-Min Jo, and Eui-Rim Jeong. "MCS Selection Based on Convolutional Neural Network in TDD System." International Journal of Electrical and Electronics Research 11, no. 2 (2023): 485–89. http://dx.doi.org/10.37391/ijeer.110232.

Full text

Abstract:

In this paper, a convolutional neural network (CNN) is proposed for selecting modulation and coding schemes (MCSs) at the time of future transmission in time-division-duplex (TDD) systems. The proposed method estimates the signal-to-noise ratio (SNR) obtained by the average of the equalizer’s output in the orthogonal frequency division multiplexing (OFDM) system and records it to select the most suitable MCS for future transmission. Two methods are proposed: one that directly selects an MCS and one that predicts the SNR first before selecting an MCS. The conventional method commonly used is to

APA, Harvard, Vancouver, ISO, and other styles

20

Xue, Linshan, Xue Li, Weiren Wu, and Yikang Yang. "Design of Tracking, Telemetry, Command (TT&C) and Data Transmission Integrated Signal in TDD Mode." Remote Sensing 12, no. 20 (2020): 3340. http://dx.doi.org/10.3390/rs12203340.

Full text

Abstract:

For satellite or aircraft networks, tracking, telemetry, and control (TT&C) and data transmission between different nodes are necessary. Traditional measurement mostly adopts the frequency division duplex (FDD) mode and uses a continuous measurement system to achieve high-precision measurement. However, as the number of network nodes increases, the mode suffers from complex frequency domain allocation, and high-cost measurement and data transmission equipment is required. This paper proposes the integrated signal in time division duplex (TDD) mode to improve frequency utilization to addres

APA, Harvard, Vancouver, ISO, and other styles

21

Korpas, Przemysław, Dawid W. Rosołowski, Michał Kajczuk, Daniel Gryglewski, and Wojciech Wojtasiak. "A Universal Hardware Platform for an LTE-Advanced Base Station Prototyping." Electronics 12, no. 5 (2023): 1069. http://dx.doi.org/10.3390/electronics12051069.

Full text

Abstract:

This paper presents a universal hardware platform (UHP) based on software defined radio (SDR) technology and developed to accelerate the prototyping and testing new hardware and algorithmic solutions for modern radio systems. There are two integrated transceivers and a baseband processor on the board. Thus, four complete RF transmitting and receiving channels, with observation paths for transmitted signals monitoring could be supported. Our platform can be operated in both time-division (TDD) and frequency-division (FDD) duplex schemes over a 300 MHz to 6 GHz frequency range with simultaneous

APA, Harvard, Vancouver, ISO, and other styles

22

Shim, Yongwoon, and Dong-Hee Shin. "Analyzing the development of 4th generation mobile network in China: actor network theory perspective." info 17, no. 1 (2015): 22–38. http://dx.doi.org/10.1108/info-09-2014-0041.

Full text

Abstract:

Purpose – This paper aims to provide an in-depth analysis of the process of standards setting based on the case of long-term evolution time division duplex (LTE TDD) deployment in China. Design/methodology/approach – Using actor-network theory (ANT) as a theoretical framework, multi-level analyses are presented to explain the process of adoption of LTE TDD at a global level. Findings – Findings identified the complex interaction between the social and technical aspects of fourth-generation (4G) by highlighting the co-evolving nature, diversity and interface that constitute the next-generation

APA, Harvard, Vancouver, ISO, and other styles

23

Zhang, Hanzhong, Ting Zhou, Tianheng Xu, and Honglin Hu. "Remote Interference Discrimination Testbed Employing AI Ensemble Algorithms for 6G TDD Networks." Sensors 23, no. 4 (2023): 2264. http://dx.doi.org/10.3390/s23042264.

Full text

Abstract:

The Internet-of-Things (IoT) massive access is a significant scenario for sixth-generation (6G) communications. However, low-power IoT devices easily suffer from remote interference caused by the atmospheric duct under the 6G time-division duplex (TDD) mode. It causes distant downlink wireless signals to propagate beyond the designed protection distance and interfere with local uplink signals, leading to a large outage probability. In this paper, a remote interference discrimination testbed is originally proposed to detect interference, which supports the comparison of different types of algor

APA, Harvard, Vancouver, ISO, and other styles

24

Winarti, Titin. "SISTEM KOMUNIKASI SELULER DENGAN UNIVERSAL MOBILE TELEPHONE SYSTEM ( UMTS )." Jurnal Transformatika 4, no. 2 (2007): 50. http://dx.doi.org/10.26623/transformatika.v4i2.19.

Full text

Abstract:

<span>Sistem celuler GSM memiliki beberapa kekurangan, yaitu tidak mampu untuk mengintegrasikan layanan video call dan video streaming karena kecepatan data masih rendah. Dengan alasan itu, maka ETSI menentukan migrasi dari GSM ke sistem generasi seluler ketiga yang disebut dengan UMTS (Universal Mobile Telephone System). Adapun spektrum frekuensi UMTS terestrial bekerja pada 1920-1980 MHz, 2110-2170 MHz untuk dipasangkan dari band dan 1900-1920 MHz, 2010-2025 MHz untuk tidak berpasangan dari band Seiring dengan perkembangan teknologi, teknologi telekomunikasi sistem seluler terus berkem

APA, Harvard, Vancouver, ISO, and other styles

25

Jiang, Zheng, Bin Han, Peng Chen, Fengyi Yang, and Qi Bi. "Design of Joint Spatial and Power Domain Multiplexing Scheme for Massive MIMO Systems." International Journal of Antennas and Propagation 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/368463.

Full text

Abstract:

Massive Multiple-Input Multiple-Output (MIMO) is one of the key techniques in 5th generation wireless systems (5G) due to its potential ability to improve spectral efficiency. Most of the existing works on massive MIMO only consider Time Division Duplex (TDD) operation that relies on channel reciprocity between uplink and downlink channels. For Frequency Division Duplex (FDD) systems, with continued efforts, some downlink multiuser MIMO scheme was recently proposed in order to enable “massive MIMO” gains and simplified system operations with limited number of radio frequency (RF) chains in FDD

APA, Harvard, Vancouver, ISO, and other styles

26

Hakim, N. F. A., T. Hariyadi, A. B. Pantjawati, and B. Mulyanti. "Analysis high gain waveguide slot antenna 2.3 GHz for Long Term Evolution-Time Division Duplex (LTE-TDD)." IOP Conference Series: Materials Science and Engineering 850 (May 23, 2020): 012054. http://dx.doi.org/10.1088/1757-899x/850/1/012054.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

HOSSAIN, EKRAM, and VIJAY K. BHARGAVA. "LINK-STATE AWARE DYNAMIC TRAFFIC SCHEDULING FOR PROVIDING PREDICTIVE QoS IN WIRELESS MOBILE MULTIMEDIA NETWORKS." Journal of Interconnection Networks 01, no. 03 (2000): 221–45. http://dx.doi.org/10.1142/s0219265900000147.

Full text

Abstract:

The performance of a centralized traffic priority based dynamic burst-level cell scheduling scheme is investigated in a correlated fading channel. The scheduling scheme is designed for the transmission of multiservice traffic over TDMA (Time Division Multiple Access)/TDD (Time Division Duplex) channels in a WATM (Wireless ATM) network. In this scheme, the number of slots allocated to a VC (Virtual Circuit) during a frame-time is changed dynamically depending on the traffic type, system traffic load, TOE (Time of Expiry) value of the data burst and data burst length. While allocating bandwidth,

APA, Harvard, Vancouver, ISO, and other styles

28

Lin, Xuanhong, Fangmin Xu, Jingzhao Fu, and Yue Wang. "Resource Allocation for TDD Cell-Free Massive MIMO Systems." Electronics 11, no. 12 (2022): 1914. http://dx.doi.org/10.3390/electronics11121914.

Full text

Abstract:

In this paper, we investigate a joint resource allocation algorithm in a time-division duplex (TDD)-based cell-free massive MIMO (CFMM) system, which has great potential to improve spectrum efficiency and throughput. Because the throughput of the system is a bottleneck due to the sharing of the pilot, we attempted to alleviate pilot contamination. We propose a pilot assignment approach called user-distance-ordering-based pilot assignment (UDOPA) based on the distance between users and the center, which can be calculated by the K-means method. Then, using an access point (AP) selection algorith

APA, Harvard, Vancouver, ISO, and other styles

29

Franci, Daniele, Stefano Coltellacci, Enrico Grillo, et al. "An Experimental Investigation on the Impact of Duplexing and Beamforming Techniques in Field Measurements of 5G Signals." Electronics 9, no. 2 (2020): 223. http://dx.doi.org/10.3390/electronics9020223.

Full text

Abstract:

The fifth generation mobile network introduces dramatic improvements with respect to the previous technologies. Features such as variable numerology, bandwidth parts, massive Multiple Input Multiple Output (MIMO) and Time Division Duplex (TDD) will extend the capabilities of the 5G wireless systems and, at the same time, will influence the measurement techniques used to assess the compliance with general public electromagnetic field exposure limits. In this study, a heterogeneous set of 5G signals is investigated with the aim of establishing an effective measurement technique suitable for the

APA, Harvard, Vancouver, ISO, and other styles

30

Kusuma, Fadli, and Hasanah Putri. "Increasing LTE-Advanced Network Capacity Using The Inter-band Carrier Aggregation (Downlink Side) Method." JURNAL INFOTEL 12, no. 2 (2020): 52–59. http://dx.doi.org/10.20895/infotel.v12i2.474.

Full text

Abstract:

According to the identification of the Operating Support System (OSS) by the Smartfren cellular operator in the Central Bandung area, six sites are found to have high traffic capacity with the physical resource block (PRb) percentage of 82.6 %. The use of PRb > 80 % is included in the warning indicator 2 based on the operator’s standards. It is also strengthened by the condition of the existing sites with the average Reference Signal Receive Power (RSRP) of -103.3 dBm, Signal to Interference Noise Ratio (SINR) of 6.28 dB, and throughput of 27.78 Mbps, thus resulting in non-optimal network p

APA, Harvard, Vancouver, ISO, and other styles

31

Zhang, Weipeng. "Design of Radio Frequency Link in Automatic Test System for Multimode Mobile Communication Base Station." International Journal of Bifurcation and Chaos 25, no. 14 (2015): 1540032. http://dx.doi.org/10.1142/s0218127415400325.

Full text

Abstract:

A modularized design for the radio frequency (RF) link in automatic test system of multimode mobile communication base station is presented, considering also the characteristics of wireless communication indices and composition of signals of base stations. The test link is divided into general module, time division duplex (TDD) module, module of spurious noise filter, module of downlink intermodulation, module of uplink intermodulation and uplink block module. The composition of modules and link functions are defined, and the interfaces of the general module and the module of spurious noise fi

APA, Harvard, Vancouver, ISO, and other styles

32

Mvodo Martin Paulin, Zanga, Koko Same Louis Christian, and Essiben Dikoundou Jean-François. "Linear precoder optimization of spectral efficiency of time division duplex hyper MIMO system with pilot contamination." Indonesian Journal of Electrical Engineering and Computer Science 29, no. 3 (2023): 1520. http://dx.doi.org/10.11591/ijeecs.v29.i3.pp1520-1528.

Full text

Abstract:

Our work is developed in context of studing Massive MIMO in a 5G context. The aim is to optimize spectral efficiency of several users hyper MIMO system during Uplink communication in a multi-cell contaminated pilot environment, using a new type of precoders called single cell-minimum mean square eroor (S-MMSE) and multicell-minimum mean square eroor (MMMSE). Indeed, we address two key and well-known issues of massive multiuser MIMO (MU-MIMO) environments in a test-driven development (TDD) operation scheme, namely acquisition of uplink channel state information (UL) and optimisation of the bit

APA, Harvard, Vancouver, ISO, and other styles

33

Zanga, Mvodo Martin Paulin, Same Louis Christian Koko, and Dikoundou Jean-François Essiben. "Linear precoder optimization of spectral efficiency of time division duplex hyper MIMO system with pilot contamination." Linear precoder optimization of spectral efficiency of time division duplex hyper MIMO system with pilot contamination 29, no. 3 (2023): 1520–28. https://doi.org/10.11591/ijeecs.v29.i3.pp1520-1528.

Full text

Abstract:

Our work is developed in context of studing Massive MIMO in a 5G context. The aim is to optimize spectral efficiency of several users hyper MIMO system during Uplink communication in a multi-cell contaminated pilot environment, using a new type of precoders called single cell-minimum mean square eroor (S-MMSE) and multicell-minimum mean square eroor (MMMSE). Indeed, we address two key and well-known issues of massive multiuser MIMO (MU-MIMO) environments in a test-driven development (TDD) operation scheme, namely acquisition of uplink channel state information (UL) and optimisation of the bit

APA, Harvard, Vancouver, ISO, and other styles

34

Yaqoob, Y. J. I. A., W. L. Pang, S. K. Wong, and K. Y. Chan. "Performance evaluation of video streaming on LTE with coexistence of Wi-Fi signal." Bulletin of Electrical Engineering and Informatics 8, no. 3 (2019): 890–97. http://dx.doi.org/10.11591/eei.v8i3.1580.

Full text

Abstract:

The continuous growth in mobile data traffic and limited license wireless spectrum have led to dramatically increase the demand of the radio spectrum. It is widespread the concern about the coexistence of long term evolution (LTE) and Wi-Fi in the unlicensed band. There are several techniques have been proposed to enable the coexistence of LTE and Wi-Fi in the unlicensed band, but these works are targeted on the impact of the LTE to the Wi-Fi network performance. An experiment is carried out in this work to evaluate the impact of Wi-Fi signal on the video streaming in the LTE network. The expe

APA, Harvard, Vancouver, ISO, and other styles

35

Y., J. I. A. Yaqoob, L. Pang W., K. Wong S., and Y. Chan K. "Performance evaluation of video streaming on LTE with coexistence of Wi-Fi signal." Bulletin of Electrical Engineering and Informatics 8, no. 3 (2019): 890–97. https://doi.org/10.11591/eei.v8i3.1580.

Full text

Abstract:

The continuous growth in mobile data traffic and limited license wireless spectrum have led to dramatically increase the demand of the radio spectrum. It is widespread the concern about the coexistence of long term evolution (LTE) and Wi-Fi in the unlicensed band. There are several techniques have been proposed to enable the coexistence of LTE and Wi-Fi in the unlicensed band, but these works are targeted on the impact of the LTE to the Wi-Fi network performance. An experiment is carried out in this work to evaluate the impact of Wi-Fi signal on the video streaming in the LTE network. The expe

APA, Harvard, Vancouver, ISO, and other styles

36

Moreira, Darlan Cavalcante, Lászlon R. Costa, Yuri C. B. Silva, and Igor M. Guerreiro. "Interference Mitigation for Dynamic TDD Networks Employing Sounding Signals." Journal of Communication and Information Systems 35 (2020): 320–32. https://doi.org/10.14209/jcis.2020.32.

Full text

Abstract:

The requirements of fifth-generation (5G) mobile communications include services with low delay and high throughput. Network densification is pointed to as a promising method to increase the network capacity. However, this solution brings new problems, such as the fast variation in traffic demands among access nodes (ANs) and between uplink and downlink, leading to high delays. To solve the traffic issues in dense networks, dynamic time division duplex (DTDD) is pointed as a possible solution. This strategy creates a new kind of interference between ANs and user equipments (UEs) called cross-i

APA, Harvard, Vancouver, ISO, and other styles

37

Wang, Yisheng, Bharatha Kumar Thangarasu, Nagarajan Mahalingam, et al. "A Full-Duplex 60 GHz Transceiver with Digital Self-Interference Cancellation." Electronics 13, no. 3 (2024): 483. http://dx.doi.org/10.3390/electronics13030483.

Full text

Abstract:

This paper presents the design and measurement of an IEEE 802.11ad standard compatible RF transceiver for 60 GHz wireless communication systems. In addition to the traditional half-duplex (HD) mode, this work supports full-duplex (FD) operations to deliver better channel utilization and faster response times for the system. The isolation between the transmitter and receiver from the architecture design to system integration for FD operations has been fully considered. A digital self-interference cancellation (DSIC) is implemented in MATLAB to verify the FD performance. The super-heterodyne arc

APA, Harvard, Vancouver, ISO, and other styles

38

Ma, Tao, Yanfeng Hu, Zhenqi Fan, Xinjiang Xia, and Dongming Wang. "Performance Analysis of Cell-Free Massive MIMO System with Network-Assisted Full-Duplex under Time-Shifting Pilot Scheme." Electronics 11, no. 14 (2022): 2171. http://dx.doi.org/10.3390/electronics11142171.

Full text

Abstract:

A network-assisted full-duplex (NAFD) system based on a cell-free (CF) massive multiple-input, multiple-output (MIMO) framework has been proposed to satisfy the demands of higher data transmission rates and efficient communication. However, pilot contamination may occur due to the reuse of pilot sequences in a massive MIMO. With this consideration, we raise an asynchronous channel estimation method based on an uplink and downlink time-shifting pilot-sending scheme, which is able to avoid pilot sequence reuse when obtaining channel state information (CSI), while the data signals could be transm

APA, Harvard, Vancouver, ISO, and other styles

39

Wang, Lulu, Xue Li, and Yinsen Zhang. "Joint Transmit and Receive Beamforming Design for a Full Duplex UAV Sensing Network." Drones 9, no. 5 (2025): 335. https://doi.org/10.3390/drones9050335.

Full text

Abstract:

Unmanned aerial vehicles (UAVs) are promising and powerful aerial platforms that can execute a variety of complex tasks. However, the increasing complexity of tasks and number of UAV nodes pose significant challenges for UAV sensing networks, such as limiting the spectral resources and increasing device complexity. A potential solution is to implement full-duplex (FD) technology in UAV sensor network transceivers. Although appropriate self-interference (SI) cancellation techniques have been employed in the digital domain, the amplitude of the signal of interest (SoI) is relatively small and ca

APA, Harvard, Vancouver, ISO, and other styles

40

Glinskiy, Kirill, Aleksey Kureev, Artem Krasilov, and Evgeny Khorov. "PABAFT: Channel Prediction Approach Based on Autoregression and Flexible TDD for 5G Systems." Electronics 11, no. 12 (2022): 1853. http://dx.doi.org/10.3390/electronics11121853.

Full text

Abstract:

To achieve high gains from multiple antennas in 5G systems, the base station (gNB) constructs precoders using channel measurements obtained based on pilot signals. For high user mobility, the measurements quickly become outdated, which is especially crucial for ultra-reliable low latency communications (URLLC) traffic because it increases channel resource consumption to provide highly reliable transmissions and, consequently, reduces system capacity. Frequent pilot transmissions can provide accurate channel estimation and high-quality precoder but lead to huge overhead. Fortunately, 5G systems

APA, Harvard, Vancouver, ISO, and other styles

41

Li, Qingyun, Zheng Dou, Zhigang Li, and Xinxiang Li. "Downlink channel estimation of intelligent reflective surface aided MU-MIMO system." Journal of Physics: Conference Series 2517, no. 1 (2023): 012008. http://dx.doi.org/10.1088/1742-6596/2517/1/012008.

Full text

Abstract:

Abstract Obtaining channel status information (CSI) is one of the main problems of the intelligent reflective surface (IRS) assisted communication system. This is because IRS has only a large number of passive reflective components and cannot process signals. In this paper, we aim to estimate downlink channel of IRS assisted multi-user multiple-input multiple-output (MU-MIMO) communication system. In time division duplex (TDD) mode, the downlink channel is estimated according to the uplink pilot by using channel reciprocity. We propose a parallel factor analysis based on projection subspace (P

APA, Harvard, Vancouver, ISO, and other styles

42

Zhong, Shida, Haogang Feng, Peichang Zhang, et al. "Deep Learning Based Antenna Selection for MIMO SDR System." Sensors 20, no. 23 (2020): 6987. http://dx.doi.org/10.3390/s20236987.

Full text

Abstract:

In this paper, we propose and implement a novel framework of deep learning based antenna selection (DLBAS)-aided multiple-input–multiple-output (MIMO) software defined radio (SDR) system. The system is constructed with the following three steps: (1) a MIMO SDR communication platform is first constructed, which is capable of achieving uplink communication from users to the base station via time division duplex (TDD); (2) we use the deep neural network (DNN) from our previous work to construct a deep learning decision server to assist the MIMO SDR platform for making intelligent decision for ant

APA, Harvard, Vancouver, ISO, and other styles

43

Caro, Jordi Biosca, Junaid Ansari, Joachim Sachs, et al. "Empirical Study on 5G NR Cochannel Coexistence." Electronics 11, no. 11 (2022): 1676. http://dx.doi.org/10.3390/electronics11111676.

Full text

Abstract:

The 5G non-public network deployments for industrial applications are becoming highly interesting for industries and enterprises owing to dependable wireless performance characteristics. With an increasing trend of network deployments in local licensed and/or shared spectrum, coexistence issues naturally arise. In this article, we present our detailed empirical results on the performance impact of a 5G NR indoor non-public network from a 5G NR outdoor network operating in the same mid-band spectrum. We present experimental results on the uplink and downlink performance impact of a non-public i

APA, Harvard, Vancouver, ISO, and other styles

44

He, Haoyu, Yanru Chen, Xinmao Huang, et al. "Deep Learning-Based Channel Reciprocity Learning for Physical Layer Secret Key Generation." Security and Communication Networks 2022 (March 19, 2022): 1–11. http://dx.doi.org/10.1155/2022/1844345.

Full text

Abstract:

Using the physical layer channel information of wireless devices to establish the highly consistent secret keys is a promising technology for improving the security of wireless networks. Nevertheless, in the time division duplex system, the reciprocity of the wireless channel that is the basic principle of key generation is impaired by nonsimultaneous sampling and noise factors. Existing physical layer key generation approaches rely on hand-crafted feature extraction algorithms, which have high overhead or security issues and are impractical in real-world situations. This paper presents a nove

APA, Harvard, Vancouver, ISO, and other styles

45

Kim, Kyunghoon, Hyunwook Yang, Jaehyun Jang, Tiefeng Sun, Seungwon Choi, and Jaeho Jung. "Online Calibration for LTE-Based Antenna Array System." International Journal of Antennas and Propagation 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/2645870.

Full text

Abstract:

This paper presents a novel calibration method that equalizes the impulse responses of all the Radio Frequency (RF) modules of an antenna array system operating in Long-Term Evolution (LTE) evolved NodeB (eNB). The proposed technique utilizes the Zadoff-Chu (Z-C) sequence of the Primary Synchronization Signal (PSS) and Sounding Reference Signal (SRS) that are available in every LTE data frame for downlink and uplink, respectively, for estimating and compensating the differences in the impulse responses among the RF modules. The proposed calibration method is suitable for wide bandwidth signal

APA, Harvard, Vancouver, ISO, and other styles

46

Zahoor, Muhammad Irshad, Zheng Dou, Syed Bilal Hussain Shah, Imran Ullah Khan, Sikander Ayub, and Thippa Reddy Gadekallu. "Pilot Decontamination Using Asynchronous Fractional Pilot Scheduling in Massive MIMO Systems." Sensors 20, no. 21 (2020): 6213. http://dx.doi.org/10.3390/s20216213.

Full text

Abstract:

Due to large spectral efficiency and low power consumption, the Massive Multiple-Input-Multiple-Output (MIMO) became a promising technology for the 5G system. However, pilot contamination (PC) limits the performance of massive MIMO systems. Therefore, two pilot scheduling schemes (i.e., Fractional Pilot Reuse (FPR) and asynchronous fractional pilot scheduling scheme (AFPS)) are proposed, which significantly mitigated the PC in the uplink time division duplex (TDD) massive MIMO system. In the FPR scheme, all the users are distributed into the central cell and edge cell users depending upon thei

APA, Harvard, Vancouver, ISO, and other styles

47

Liu, Hongmei, Honggui Deng, Yougen Yi, Zaoxing Zhu, Gang Liu, and Jie Zhang. "Energy Efficiency Optimization Based on Power Allocation in Massive MIMO Downlink Systems." Symmetry 14, no. 6 (2022): 1145. http://dx.doi.org/10.3390/sym14061145.

Full text

Abstract:

To solve the energy efficiency (EE) optimization in a multi-cell (MU) massive multiple-input multiple-output (MIMO) downlink system, of which channels are of symmetry in the Time-Division Duplex (TDD) protocol, we utilize a spatially correlated channel model and adopt the minimum mean-squared error (MMSE) estimator to tailor linear precoding vectors. Then, we derive the expression of downlink spectral efficiency (SE), taking interference into account. Subsequently, we establish the EE optimization function, which is defined as the average capacity divided by power consumption. In an interferen

APA, Harvard, Vancouver, ISO, and other styles

48

Zeng, Yao, Yuxi Tang, and Luping Xiang. "Physical Layer Security Design for Polar Code Construction." Cryptography 6, no. 3 (2022): 35. http://dx.doi.org/10.3390/cryptography6030035.

Full text

Abstract:

In contrast to the network security that relies on upper-layer encryption for the confidentiality and authenticity of communications, physical layer security (PLS) exploits the uniqueness and randomness of the physical channel to encrypt information and enhance the security of the system. In this paper, we study the PLS of a polar-coded wireless communication system. To be more specific, we leverage the unique properties in polar code construction and propose a channel quality indicator (CQI)-based frozen-bit pattern generation scheme. The transmitter employs the Gaussian approximation algorit

APA, Harvard, Vancouver, ISO, and other styles

49

Xiong, Canyun, Shiyong Chen, Liang Li, and Yucheng Wu. "Pilot Assignment Based on Graph Coloring and Location Information in Multicell Multiuser Massive MIMO Systems." Wireless Communications and Mobile Computing 2021 (July 15, 2021): 1–12. http://dx.doi.org/10.1155/2021/9913149.

Full text

Abstract:

A massive multiple-input multiple-output (MIMO) system uses a large number of antennas in the base station (BS) to serve multiple users, which significantly improves the capacity of the system. However, in time division duplex (TDD) mode, the pilot contamination (PC) is inevitable due to the multiplexing of pilots. This paper proposed a pilot assignment based on graph coloring and location information (GC-LI) to improve the performance of users. Specifically, based on graph coloring, the proposed GC-LI algorithm combines location information like the angle of arrival (AoA), distance, and corre

APA, Harvard, Vancouver, ISO, and other styles

50

Şenyuva, Rıfat Volkan. "Covariance Estimation Of Millimeter Wave Channels Using Sparse Signal Recovery Algorithms In A Hybrid MIMO Architecture." Firat University Journal of Experimental and Computational Engineering 4, no. 1 (2025): 30–43. https://doi.org/10.62520/fujece.1423312.

Full text

Abstract:

In this paper, the channel covariance estimation of a single mobile station (MS) in a narrowband millimeter wave (mmWave) communication system was addressed. The communication system worked in time division duplex (TDD) mode and the channel covariance was estimated in the uplink communication. The base station (BS) had multiple antennas with a hybrid architecture of radio frequency (RF) chains made up of analog and digital combiners, while the MS had a single antenna. The investigated system model assumed the shared combining matrix scheme where the same combining matrix was used across multip

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!