In this paper, simple methodologies of deep learning application to conventional multiple-input multiple-output (MIMO) communication systems are presented. The technologies with neural network (DNN) structure, emerging in various engineering areas, have been actively investigated the field as well. physical layer systems, there practical challenges DNN: calculating complex number DNN and designing proper structure for a specific system model. This paper proposes verifies solutions...

Digital twin has recently received considerable attention in various industry domains. The digital replicates physical objects (e.g., people, objects, spaces, systems, and processes) the real world into world. It also provides simulations to solve problems or improve situational operations. Therefore, is a convergence of technologies, such as advanced machine-learning algorithms, data analytics, super-resolution visualization modeling, simulation. Because complicated technology, step-by-step...

A combining of MIMO signal processing with OFDM is regarded as a promising solution enhancing the performance next generation wireless system. Therefore, in this paper, an OFDM-based system employing layered space-time architecture considered for high-rate transmission. With emphasis on preamble design multi-channel separation, we address channel estimation based time-domain windowing and its imperfectness MIMO-OFDM By properly designing each multiple antennas to be orthogonal time domain,...

In order to quickly and effectively respond a newly received criminal case, information regarding the type severity of case is crucial for authorities. This paper designs develops crime risk level prediction technique based on machine learning technology verifies its performance. The designed can predict using text-based summary, which receipt data. For summary data, KICS data format considered, actual policing that contains about cases. type, 21 representative types crimes are considered;...

Many efforts to achieve cost savings through simulations have been ongoing in the cyber-physical system (CPS) industry and manufacturing field. Recently, concept of digital twins has emerged as a promising solution for reduction various fields, such smart cities, factory optimization, architecture, manufacturing. Digital offer enormous potential by continuously monitoring updating data study wide range issues improve products processes. However, practical implementation presents significant...

This paper investigates the integration of an intelligent reflecting surface (IRS) and a jammer controlled interference to enhance physical layer security (PLS) wireless powered communication networks (WPCNs). In 6G networks, where low-power Internet Things (IoT) devices are prevalent, energy efficiency critical. While existing studies primarily focus on IRS-assisted methods improve PLS by manipulating signal reflections, such approaches may not fully degrade reception eavesdroppers. We...

This paper proposes a traffic prediction-based connected-mode discontinuous reception (C-DRX) approach to enhance energy efficiency and reduce data transmission delay in mobile communication systems. Traditional C-DRX determines user equipment (UE) activation based on fixed timer cycle, which may not align with actual occurrences, leading unnecessary increased consumption or delays reception. To address this issue, presents an ensemble model combining random forest (RF) temporal...

An efficient MIMO signal detection technique with low complexity is presented for MIMO-OFDM systems. The proposed has a feature of combined QRD-M and DFE detection. In our M transmit antennas, after executed first T steps, last - steps. This approach simple complexity, because the computations limited by newly adopted parameter T. From simulation results, 4 times = 2 reduced 61% compared that conventional at expense about 0.7dB degradation BER performance BER=10 <sup...

The emergency broadcasting system based on T-DMB network have been developed and installed in tunnel environment. This paper describes implementation field test results of the practical can execute on-channel repeating function common And provides service accident or disaster environment to legacy receivers. According results, smooth operation is evaluated for both with

Digital twin is a technology developed to solve problems in the real world or optimize processes and systems world. twins virtually replicate various objects world, based on this, simulations digital can be performed at low cost Until now, these technologies have been designed target single system process. Recently, some researchers developers tried more complex by using twin. The concept that emerged this federated twin, which organically unites multiple twins. However, first procedure for...

In this paper, the channel estimation in multi-band OFDM (MB-OFDM) ultra-wideband (UWB) based multipleantenna transmission systems is studied. For multiple antennas, each preamble designed by Zadoff-Chu sequence satisfies orthogonal property time domain. Therefore, proposed preambles can improve system performance and be applied to MB-OFDM specification case of more than two transmit antennas.

Since the communication system based on FTN signaling uses faster symbol rate than Niquist rate, ISI is generated inevitably. Therefore, interference cancellation process required in receiver with signaling. The operation a burden receiver. To reduce complexity of process, this paper proposes simple and signal detection technique. First, modeling matrix computation described, then very technique introduced described model.

Faster-than-Nyquist (FTN) signaling is a useful communication technique for high spectral efficiency. However, since orthogonality between symbols destroyed when symbol rate faster than the Nyquist used, intersymbol interference (ISI) inevitably generated. Interference cancellation and signal detection processes are required to reduce effect of ISI on FTN receiver. Furthermore, in multipath fading channel complicated problem because nonlinear from combined with additional channel. This paper...

In this paper, the subjective audio quality of various digital radio systems is evaluated. order to estimate true a commercial service, test signals were acquired directly from equipment in field. Twenty-one subjects participated after pre-screening. The evaluation process consisted two phases. first phase, each system was evaluated as function bit rates, and relationship between channel capacity obtained. confirm consistency, second Assuming that tested paper used for these results provide...

In this letter, a low complexity ML detection technique for V-BLAST systems is proposed. proposed scheme, V probable streams are detected according to the first sub-stream of DFE detector and most stream selected by likelihood test, since performance system depends on capability. It has been shown that can detect transmitted data more accurately than conventional decoding very lower detector.

This paper proposes a MIMO-OFDM scheme reducing the computational complexity and providing comparable performance to QRD-M detection in IEEE 802.11n. The proposed checks channel condition per subcarrier then selects either ordered DFE or adaptive according that information. post-detection SNR which judges depends on Moore-Penrose pseudo-inverse matrix G. case of good bad subcarrier. QRDM number variable survival symbols M accordance with at each layer. Compared conventional (M=16) scheme,...

In this paper, we apply multi-antenna scheme to DAB system for high-rate transmission. the MIMO-DAB with a number of transmitting and receiving antennas increases transmission rate efficiently low multiplication operations. For channel estimation in system, propose new PRS structure evaluate performance. The proposed can estimate multi-channel information based on semi-blind processing. performance is compared that conventional training sequence employing Tarokh's matrix. And also...

OFDMA is regarded as a promising solution for improving the performance of interactive wireless broadcasting systems. Recently, to enhance systems, MIMO techniques have been investigated, and systems extended architectures. Although transmit diversity clearly advantageous on uplink system in broadcasting, it may not be possible that practical more than two antennas due size, cost, or hardware limitations. Cooperative are proposed overcome networks aim utilize available terminals collection...

A combining of MIMO signal processing with OFDM is regarded as a promising solution enhancing the performance next generation WLAN system. Therefore, in this paper, IEEE 802.1 In system employing layered space-time architecture considered for high-rate transmission service. However, V-BLAST scheme has not reached available capacities due to imperfect nulling and cancellation. efficient detection proposed 802.11 n scheme, T probable streams are detected according first sub-stream DFE detector...

This paper depicts the digital radio test bed design and performance evaluation for audio broadcasting, DAB+, terrestrial multimedia broadcasting systems that are representative standards operating in band III (out-of-band). We consider a laboratory trial to measure of each system. The existing measurement have some limitations, such as small number available items systems. However, introduced can cover above three various parameters. minutely describes not only designs but also results...

Many countries are converting their analog communication and broadcasting services into digital services. However, radio service is still an issue to be addressed. In order provide service, it very important choose the most appropriate method for frequency environment listeners. This paper depicts laboratory test results of in-band technologies, HD Radio DRM+. To contribute decision standard design transmission network, various many items expressed.

For Eureka-147-based digital audio broadcasting (DAB) system, frequency band III has been generally used in many countries. However, some countries, other legacy services have adopted the same band. Especially, South Korea, T-digital multimedia (DMB) service already broadcasted through since early 2005. In this paper, to adopt DAB system III, channel allocation method and interference analysis are investigated for Korea environment with T-DMB. To allocate channel, actual FM radio stations...

For the performance improvement of DVB-S2 satellite broadcasting system, DVB-S2X standard has been developed. considered a variety baseband modulations and LDPC code rates. And for spectral efficiency enhancement in broadcasting, FTN signaling studied recent years. transmits symbols at rates so faster than Nyquist rate that ISI is inevitable. The effect caused by modulation as well factor which defined inverse number symbol acceleration. In this paper, evaluations various schemes are...

In this letter, we aim at the study of an OFDM system that employs adaptive modulation techniques to achieve efficient transmission service. techniques, a banded AM technique can reduce number information bits and signaling overhead. We evaluate compare with Subcarrier technique. Moreover, channel condition, apply SNR estimation method. Furthermore, increase performance system, frequency domain pre-equalization is applied. The simulation results have been shown schemes for multi-media services.