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Wireless signals dispatched from a remote operations center to command wind turbines are prone to impulsive interferences. In this applied context, this paper proposes the use of a median filter to mitigate these impulsive interferences in a doubly-fed induction wind turbine. To a perfect proposal evaluation, a co-simulation with the wireless system model and the generator predictive control one is...
The Band-1 receiver front-end cartridges for Atacama Large Millimeter Array, which covered 35–50 GHz frequency range, are now in preproduction stage. For the first three preproduction cartridges, the measured receiver noise temperature is less than 16–31K for any combination of the inband RF and LO frequencies. The measured gain flatness, even with the limitation of the optical window of the cryostat...
With the rapid increasing scale of Intelligent Transportation System (ITS) and vehicular network, our quality of life are significantly improved, especially traveling in urban area. To supply a large amount of real-time ITS applications, such as navigation and automatic driving, aggregation delay should be controlled in a small range so that more data might be dropped during aggregation. State-of-the-art...
In this paper, we study the problem of cache content placement in the wireless small cell networks. We consider the small base station (SBS) has a cache unit and limited backhaul capacity, and the SBS cache the popular content to serve local users request while reducing the traffic load on the backhaul link. The goal of the cache unit in SBS is to maximum the traffic offloading from backhaul link,...
Internet of things(IoT) is the system which interrelates different computational devices, digital machines, mechanical machines and they have been bestowed with unique identifier having the talent to send data over a interconnection of networks which does not require interactions between human and human or machine and mankind. In this manuscript we have discussed about the different communication...
There is a trend that the functionalities of communication, computing, and caching (CC&C) are merging together in the future networks. Recently, this mergence is formed by the concept of cloud radio access network (C-RAN) with caching as a service (CaaS). In this paper, we dissect the interactions of CC&C in C-RAN with CaaS from two dimensions: physical resource dimension and time dimension...
Cognitive radio (CR) was proposed in wireless communications to improve spectral efficiency based on the concept of opportunistic spectrum access. Because orthogonal frequency division multiplexing (OFDM) has become the major access technique, an efficient spectrum sensing technique targeted at OFDM-based signals is one of the primary requirements of CR networks. To reduce computational complexity,...
Decentralized coded caching is applicable in scenarios where the server does not have enough knowledge about the entire cache network to perform centralized coordination during prefetching, such as when the server is uninformed of the number of active users and their identities in a wireless or mobile environment. Most of known decentralized strategies use random uncoded prefetching followed by coded...
The communication among connected vehicles in vehicular ad hoc network must be protected from unauthorized message injection and message alteration bymisbehaving vehicles. The proposed scheme allows only the connected authentic vehicles to disseminate message. It identifies the replay attackers, fake nodes and also the attackers that are disseminating false message as misbehaving vehicles. A certificate...
In this paper, analog-and-digital hybrid beamformer design is considered for millimeter-wave (mmWave) wideband multi-user (MU) multiple-input single-output (MISO)-OFDM downlink systems, where a single common analog beamformer is used for all subcarriers while a separate digital beamformer is applied to each subcarrier. By applying a signal-to-leakage-plus-noise ratio (SLNR) approach, an efficient...
This paper proposes a novel scheme of Multi-carrier Index Keying — Orthogonal Frequency Division Multiplexing (MCIK-OFDM), called as repeated MCIK-OFDM (ReMO), which is capable of improving the error performance compared to classical MCIK-OFDM for a given spectral efficiency. Similar to the classical MCIK-OFDM, ReMO activates only a subset of sub-carriers to carry information bits by the use of both...
This paper proposes the flexible reassociation control scheme for wireless local area networks (WLANs) based on mechanism design theory. The notion of general preference in the theory enables us to formulate users' various kinds of preference (based on such as high throughput and/or low latency). The proposed scheme is guaranteed to provide a unique allocation of access points (APs) to STAs in each...
The aim of the paper has been to make individuals with disability in arms, who have been fed during meals, completely or partially independent by use of the self-feeding device. In this paper, it describes a self-feeding system designed to increase the independence of a person who is unable to use their arm for self-feeding. It is FeedBot, a highly integrated and compact service robot with manipulator...
This paper describes the design and implementation of a wireless home automation system that can be used for general purposes in our life. The proposed system is designed for easy installation, so it could be use at any location to gather indoor conditions. The proposed system comprises of a wireless sensor and actuator network which is low cost and low power. Each wireless sensor node senses and...
We study random access for machine-type commu- nications (MTC) based on the notion of compressive sensing (CS) over a distributed input distributed output (DIDO) system consisting of a number of remote radio heads (RRHs) that are closely located to devices. In a DIDO system, each active device can have a signature that depends on its connectivity to RRHs and the signatures of active devices are estimated...
Dynamic Adaptive Streaming over HTTP (DASH), as one of the main video transmission technologies, has been widely concerned. However, due to the unstability of wireless environment and the restrictions of mobile networks, it is challenging to deliver DASH-based videos in LTE systems and enhance the performance of Quality of Experience (QoE). In this paper, a problem is formulated to maximize the sum...
We study a simple one-dimensional, discrete-time network model that consists of two nodes moving on a discrete circle, changing their direction of movement randomly, and a single packet travelling in the clockwise direction, using combinations of transmissions between the two nodes (when they are co-located) and physical transports on their buffers. In this setting, we provide exact, explicit expressions...
Burst communications in a wideband environment subject to Doppler, multipath, and noise is challenging. An example is the Underwater Acoustic (UWA) channel. Compared to the over-the-air radio frequency (RF) channel, the UWA channel is subject to severe distortions due to Doppler as well as multipath. The challenge of interest is wideband burst communications in such an environment. Thereto the effect...
Both localization and synchronization of mobile nodes are of fundamental importance for wireless networks. With the emergence of full-duplex (FD) communication technology, inter-node distances and clock offsets among a set of nodes can be simultaneously obtained through only two frames of communications, thus significantly improving the efficiency of node localization and synchronization. In this...
This paper considers the joint antenna selection (AS) problem for a classical two-user non-orthogonal multiple access (NOMA) network where both the base station and users are equipped with multiple antennas. Since the exhaustive-search-based optimal AS scheme is computationally prohibitive when the number of antennas is large, two computationally efficient joint AS algorithms, namely max-min-max AS...
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