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This paper proposes a predictive power control for a converter connected to the grid. The power references are sent by a wireless channel with the focus to control renewable sources. The three-phase converter controls the power injected to the grid using a predictive control technique. Simulation results are presented to validate the system operation.
This paper proposes a joint source channel-coding scheme based on a multi-encoder and inertial navigation module to solve the problem of poor wireless channel environment and high bit error rate. The encoder consists of three independent channels from the same source encoding the video imager for different H.264 encoding compression ratio. The propsed scheme aims to improve the system robustness under...
In wireless coded cache network, data contents are cached in a number of mobile devices using an erasure correcting code, and a user retrieves content from other mobile devices using device-to-device communication. In this paper, we consider the repair problem when multiple devices that cache data contents fail or leave the network. By exploiting the wireless broadcast nature, we formulate the repair...
Efficient and robust wireless video delivery is an enabling technology for various applications. The existing wireless video transmission scheme has the cliff effect and it cann't gracefully adapt to channel variations. In this paper, we introduce a pseudo-analog wireless video transmission improvements and design in the hardware. Comparing with the traditional transmission, the linear processing...
Data traffic volume including video transmission is increasing exponentially over the past decade. The demand for ultra-high speed wired and wireless communication systems is also growing in an unprecedented pace. In providing ultra-high data transmission rate as well as reliable communications, error correction codes are playing an ever important role. They can ensure received data being highly reliable...
This paper examines the 4kUHD video quality from streaming over an IEEE 802.11ac wireless channel, given measured levels of packet loss. Findings suggest that there is a strong content dependency to loss impact upon video quality but that, for short-range transmission, the quality is acceptable, making 4kUHD feasible on head-mounted displays.
Telehaptic systems aim at providing a higher level of immersion into a remote environment by adding an ability of physical interaction with the objects and/or people in the distant space. A system consists of an operator and a remote robotic device equipped with sensors and actuators which can transmit interaction parameters to the operator upon the contact with the environment. Telehaptic systems...
The broadband high speed digital signals may affect nearby wireless communication devices and cause significant electromagnetic interference (EMI) problem. Common solutions, such as shielding or layout improvement, usually focus on the coupling path control. This paper presents a new coding method compatible with 8b/10b to reduce EMI at the source. The coding uses the control-symbol K29.7 in 8b/10b...
In the next few years, the development of wireless communication systems propel the world into a fully connected society where the Machine-type Communications (MTC) plays a substantial role as key enabler in the future cellular systems. MTC is categorized into mMTC and uMTC, where mMTC provides the connectivity to massive number of devices while uMTC is related to low latency and ultra-high reliability...
We characterize dispersion code multiplexing (DCM) in incoherent line-of-sight (LOS) channels. First, we conceptually and mathematically describe an LOS-DCM system. Next, we statistically analyze and model multiple access interference (MAI) in this system. Finally, we investigate the system performance in terms of bit error probability (BEP).
The deployment of smart grid communication networks (SGCN) in urban areas has been possible due to the huge availability of wired and wireless communication technologies. However, in rural areas, those communications options are usually not available, unsuitable and/or too costly, making the deployment of a SGCN more challenging in such a case. On the other hand, the recently introduced low power...
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...
In this paper we revisit the problem of deriving the expected number of transmissions for multicasting random linear coded (RLC) packets on single-hop wireless channels. We show by deriving the closed form expression for an instance of the problem that previous analytical formulation does not accurately model the true expected number of transmissions, especially for smaller finite field size. Our...
We present nonasymptotic bounds on the maximum coding rate achievable over a Rician block-fading channel for a fixed packet size and a fixed packet error probability. Our bounds, which apply to the scenario where no a priori channel state information is available at the receiver, allow one to quantify the tradeoff between the rate gains resulting from the exploitation of time-frequency diversity and...
In recent years, surveillance videos are playing an important role in modern security systems. As a state-of-the-art video coding standard, High Efficiency Video Coding (HEVC) has been deployed in many surveillance cameras. Nevertheless, the request of real-time and high subjective quality coding still poses the great challenging problem of efficient representation and compression for high complexity...
Internet of Things is wide focused on academia and industrial applications. Wireless Universal Serial Bus (USB) based on Ultra Wideband (UWB) and Multiple-Input Multiple-Output (MIMO) technology is a major research filed of the Internet of Things for extending the wireless link coverage. This paper presents a study of propagation channel and system implementation with low power and cost requirements...
Stringent mobile usage characteristics force wireless networks to undergo a paradigm shift from conventional connection-centric to content-centric deployment. With respect to 5G, caching and heterogenous networks (HetNet) are key technologies that will facilitate the evolution of highly content-centric networks by facilitating unified quality of service in terms of low-latency communication. In this...
Coded caching is a problem where encoded broadcasts are used to satisfy users requesting popular files and having caching capabilities. Recent work by Maddah-Ali and Niesen showed that it is possible to satisfy a scaling number of users with only a constant number of broadcast transmissions by exploiting coding and caching. Unfortunately, all previous schemes required the splitting of files into an...
In a Fog Radio Access Network (F-RAN) architecture, edge nodes (ENs), such as base stations, are equipped with limited-capacity caches, as well as with fronthaul links that can support given transmission rates from a cloud processor. Existing information-theoretic analyses of content delivery in F-RANs have focused on offline caching with separate content placement and delivery phases. In contrast,...
As private information of individuals become more accessible, data privacy evolved to be an important aspect of communication technologies. Among existing privacy definitions, the utility privacy trade-off model is suitable for the assessment of privacy due to its relation with the information theory and the rate distortion theory. In this paper, the effects of the transmission errors due to the wireless...
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