The Internet of Vehicles (IoV), a burgeoning technology, merges advancements in the internet, vehicle electronics, and wireless communications to foster intelligent interactions, thereby enhancing efficiency safety transportation systems. Nonetheless, continual high-frequency among vehicles, coupled with regional limitations system capacity, precipitate significant challenges allocating resources for vehicular networks. In addressing these challenges, this study formulates resource...

In recent years, the demand for maritime wireless communication has been increasing, particularly in areas such as ship operations management, marine resource utilization, and safety assurance. However, due to difficulty of deploying base stations(BSs), still faces challenges terms limited coverage unreliable quality. As number users on ships offshore platforms increases, along with growing mobile at sea, conventional terrestrial stations struggle provide stable connectivity. Therefore,...

A generalised method for constructing binary preferred pairs with zero-correlation duration (ZCD) of (N/2 + 1) chips is proposed. Binary sequence sets ZCD and enlarged family sizes are generated by carrying out a chip-shift operation the pairs. The properties proposed sequences effective approximately synchronised (AS) CDMA systems.

We intend to improve the sustainability of rural villages by investigating element technologies and platforms necessary for building smart villages. There are so many investment city solutions in cities. but there relatively few investments or small This situation can not only increase urban problem due population city, also deepen digital gap citizens. So far, studies on village have been investigated fragments. will examine cases applied as a whole study open platform that analyzes overall...

In this paper, a novel efficient algorithm for MIMO detection in MIMO-OFDM systems has been proposed. This paper also shows that the complexity can be greatly reduced by applying threshold breadth-first tree search step to eliminating paths. That is, derives thresholds based on LR-aided nonlinear and performs simple algorithm. requires lower computational than conventional QRD-M achieves same bit error performance. After is proposed, applies system performance comparison terms of complexity....

Novel ternary preferred pairs (TPPs) that have a greater zero correlation duration (ZCD) of (0.75N + 1) for period N are constructed by applying selected padding to binary with ZCD (0.5N 1). A chip-shift operation is then performed derive new sequences superior family size sequences.

LED-ID (light emitting diode - identification) system typically uses line of sight (LOS) channels to achieve high data rate and bright illumination. In LOS channel, however, the has very narrow coverage. cellular networks, relay station been introduced improve throughput Accordingly, new optical scheme is essential support multi-hop transmission in relay-assisted networks. this paper, effects shadow region problem are investigated for LED identification (LED-ID) a non-line (NLOS)...

This paper proposes a novel direction of arrival (DoA) estimation method based on the Multiple Signal Classification (MUSIC) algorithm using virtual antennas. The MUSIC is widely used DoA technique known for its high accuracy and resolution. However, it has fundamental limitation: when necessary condition having more antenna elements at base station than users not met, becomes infeasible. To address this limitation, we introduce concept antennas, allowing estimation, even under restricted...

Spectrally efficient frequency division multiplexing (SEFDM) is attracting attention as one solution to the problem of resource scarcity. This transmission scheme improves spectral efficiency by overlapping subcarriers compared OFDM. However, SEFDM suffers from inter-carrier interference, which leads severe performance degradation. To eliminate this linear detection methods such zero-forcing (ZF) and minimum mean square error (MMSE) are superior in complexity but weak decoding performance....

We propose a design method of fast Fourier transform (FFT) large-scaled integration (LSI) for an orthogonal frequency division multiplexing (OFDM) system. The proposed FFT LSI is designed with simple current mode circuits, wired-OR connection and gate-width-ratioed mirror. For low power consumption, two methods are proposed, current-cut (CC) rounding process. CC operation performed on-off source. process adopted the component matrix. Bit error rate (BER) in OFDM system simulated from “0.1”...

In this paper, a new Radix-N pipeline fast Fourier transform (FFT) processor for the implementation of IEEE 802.11a baseband orthogonal frequency division multiplexing (OFDM) modem wireless local area network (WLAN) is proposed. The newly proposed scheme has simple control structure and multiplication block designed based on canonic signed digit (CSD) with N/4 twiddle factors, which enables both hardware complexity power consumption to be reduced as about less 33% 66% respectively than...

Emergency lights and exit signs are an indispensable part of safety precautions for effective evacuation in case emergency public buildings. These sign indicates safe escape routes doors, using internationally recognizable sign. However visibility those drops drastically situations like fire smoke, etc. loss causes serious problems evacuation. This paper propose a novel light built-in with Bluetooth Low Energy (BLE) Beacon to assist the self-guiding devices crisis management avoid panic...

In this paper, we present the study on proposed design of a real-time transmission video from drone to broadcasting station (OBVan) by using F8L10D-N LoRa Module. Nowadays, technology is proved be mass low cost, long range machine-to-machine connectivity. Particularly in field and communication system, RF Module spread spectrum with distance strong penetrative ability that double stronger than traditional FSK as well PSK modulation scheme.

최근 스마트폰 보급이 확산되고 전시 및 관람 산업 시장이 급성장함에 따라 미래 전시관은 관람객에게 보다 큰 만족과 공감을 줄 수 있는 능동적, 실감형, 맞춤형, 인터랙티브 서비스를 제공하는 방향으로 진화하고 있다. 이를 실현하기 위해서는 실내 전시관내에서 관람객의 위치를 파악하는 일은 매우 중요하며, 측위 정밀도에 제공 가능한 서비스 품질도 달라진다. 본 논문에서는 연구되고 위치 인식 기술을 분석하고 전시관에 적합한 방법을 제안하였다. 위해, 먼저 IT 기술과 접목된 지향적 형태를 도출하고, 출시된 BLE(Bluetooth Low Energy) 기술 사양 비교 분석을 포함한 대표적인 기술에 대해 분석하였다. 또한 RF VLC의 두 가지 측면에서 채널 특성을 시뮬레이션을 수행하였다. 토대로 전시관을 위해 VLC RF(Wi-Fi BLE) 기술이 결합된 방안을 Recently, as the supply of smart phone is spreading and exhibition...

Cognitive radio (CR), which is proposed as a technology that utilizes the frequency resources effectively, has studied to relive scarcity of resources. CR provides opportunistically under-utilize licensed secondary user. However, in wireless channels, due effect fading and shadowing environments, spectrum sensing performance compromised. Besides, detect classify various systems, novel algorithm needed. Therefore, this paper, we with water marking scheme.

In Orthogonal Frequency Division Multiplexing (OFDM) systems, a general method to estimate frequency-selective in-phase and quadrature-phase (IQ) imbalance is transmit pilot signal over two symbols with half the subcarriers nulled avoid inter-carrier interference (ICI). Multiple-Input Multiple-Output (MIMO)-OFDM number of required mitigate increases in proportion antennas. this case, total transmission rate also degraded. To reduce problem, we propose an efficient joint estimation channel IQ...

This paper introduces a new method for estimating the maximum Doppler shift using decision feedback channel estimation (DFCE). In highly mobile environments, which are expected to be covered beyond 5G and 6G systems, relative movement between transmitter receiver causes shifts. leads inter-carrier interference (ICI), significantly degrading communication quality. To mitigate this effect, systems that estimate adaptively adjust parameters have been extensively studied. One of most promising...