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This paper presents a recursive oblique projector using the Gram-Schmidt process. The recursive construction of oblique projectors allows a receiver to prevail interference and noise environment in direct-sequence code-division multiple-access (DS/CDMA) system. When the number of the interfering users in the system increases or decreases, the oblique projector is recursively updated by the proposed...
Demand for ad-hoc networks is increasing so it is expected ad-hoc networks will exist in close proximity in the future. A contention window control method, ACWA, which improves throughput of ad-hoc network against radio interference has been recently proposed. However unfairness of throughput between ACWA and DCF might be caused. We propose a modified ACWA method (GSAR scheme) which drastically improves...
New types of devices from electromagnetic (EM) technology and scientific area have emerged from its core in our society for a variety of purposes. EM radiation from these devices has caused growing concern about possible bio-effects and interference produced in the other devices. Our aim is to show the danger so that public can decide the risk they want to take. Quite similar to many phenomenon, it...
Dynamic spectrum access (DSA) has been envisioned to become the key to solving worldwide spectrum shortage. However, the open nature of wireless medium brings severe threats to the DSA system resulting from unauthorized access. Specifically, unauthorized secondary user (SU) utilizes the licensed spectrum by faking/replaying the spectrum permit, which will not only introduce severe interference to...
Bioelectrical impedance technology is considered to be a noninvasive method of measuring heart function. Feature points extraction of impedance cardiography (ICG) signal is vital to cardiovascular disease diagnosis, and feature points extraction has curative value after operation. In this paper, the new algorithm combined with the wavelet technology to extract feature points accurately. Feature points...
The combination of Device-to-Device (D2D) Communication in 5G Cellular Networks and vehicular networks will not only increase the performance of vehicular networks, but also increase the revenues for network operators and services providers. This paper proposes a 5G D2D routing method oriented to vehicular networks, which can increase the connectivity and scalability of vehicular networks while alleviating...
Water supply system has characteristics of non-linear, time-varying parameter, large time delay, so its mathematical model changes time by time. Water supply system widely use PID controller to keep constant pressure and PID controller need accurate mathematical model. The system that use PID controller is along with large overshoot, more adjusting time. Fuzzy controller don't need the accurate mathematical...
User generated content is gradually being recognized for its remarkable potential to enrich the professionally broadcasted content, but also as the means to provide acceptable quality audiovisual content for public events where professional coverage is absent. This potential is particularly interesting with respect to the audio modality, as a multitude of temporally overlapping User Generated audio...
We propose a signal-channel, adaptive threshold selection technique for binary mask construction, namely APHONIC, (AdaPtive tHreshOlding for NoIse Cancellation) for smart mobile environments. Using this mask, we introduce two noise cancellation techniques that perform robustly in the presence of real-world interfering signals that are typically encountered by mobile users: a violin busker, a subway...
With increase in size of wireless mesh networks so are problems on interference, load-imbalance, and congestion that lowers throughput significantly. Proposals to solve issues related to this problem include accurate accounting of the channel load so that traffic can be directed along calmer regions of the networks reaching destination in time. Load aware routing metrics have been proposed for this...
Inter-Cell Interference Coordination (ICIC) techniques are proposed as solutions to alleviate the negative impact of interference on system performance, while enhancing the provided Quality of Service (QoS). Typically, the available bandwidth is divided into inner and edge sub-bands. Users are also classified into interior and edge users. The available resources in each zone are exclusively allocated...
With the increment in users' data demand and the emergence of applications with stringent Quality of Service requirements, important improvements in cellular network architecture need to be made. In this paper we explore the symbiosis of three key communication technologies in 5G: Device-to-Device communications, 60 GHz unlicensed band transmissions and adaptive beamforming techniques. It provides...
Vehicle-to-vehicle (V2V) communication which supports ubiquitous information exchange and content sharing among vehicles with little or no human intervention becomes a key enabler for intelligent transportation industry. In this paper, we adopt a two-hop relay transmission mode to maximize the total spectrum efficiency of a device-to-device (D2D) based vehicular cooperative network while ensuring...
Quorum sensing (QS) is a bacterium-to-bacterium communication mechanism that uses signaling molecules called autoinducers (AI). However, such mechanism is not well defined yet due to its inherent complexity and energy constraints. We construct a communication network with the QS mechanism and analyze the average uplink channel capacity and bit-error-rate performance of the proposed system model over...
With the evolution of cellular networks and the panoply of different services offered, it is crucial for mobile network operators to start planning with procedures that are simple, inexpensive and robust. In this paper we develop and present a methodology for the planning and dimensioning of UMTS network dedicated to the region of Bejaia in Algeria. The work focuses on the UTRAN since the implementation...
Cumulative distribution function (CDF)-based scheduling (CS) has been known as an efficient technique for cellular networks, which satisfies arbitrary channel access ratio requirements of users in a cell, while efficiently exploiting multiuser diversity (MUD). In this paper, we mathematically analyze both throughput and energy efficiency (EE) of CS in a multi-cell downlink network where the users...
Non-Orthogonal Multiple Access (NOMA) is a promising multiple access technique for 5G wireless communication networks due to its higher spectral efficiency and user fairness. Power allocation is the key to improve the performance of NOMA systems. In this paper, we focus on a certain NOMA group of a hybrid NOMA system. We formulate a sum-throughput maximization problem for uplink under the constraints...
Hybrid precoding provides a compromise between the system performance and the implementation complexity in millimeter wave (mmWave) systems, while cloud radio access network (C-RAN) is a green network composed of central baseband unit (BBU), distributed low-cost remote radio heads (RRHs) and low-latency fronthaul links connecting BBU and RRHs. This paper jointly optimizes the user scheduling and hybrid...
In order to counteract hostile communication based on the advanced Orthogonal Frequency Division Multiplexing (OFDM) technology, an efficient and unrecognizable jamming technique by failing the OFDM cyclic prefix (CP) functionality is developed in the paper. CP is introduced into OFDM systems to prevent interference caused by the multipath fading, as long as it is no shorter than the channel delay...
In next generation cellular networks, small cell base stations (BSs) with ultra-dense deployments are likely to cooperate together to manage interference and provide users with high data rates. But users may still experience large drops in throughput due to lack of available resources even with high received signal strength. In this paper, we propose a congestion-aware user-centric cooperative BS...
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