Recent Advances in Electrical & Electronic Engineering - Volume 10, Issue 1, 2017

Background: Network on Chip (NoC) is a communication mechanism to provide scalable, modular, robust and high-performance communication for the on-chip network. Switching Techniques: NoC brings the concept of packet switching from data to on-chip networks. The nodes are connected through point to point links using regular and irregular topologies. The packet traverses along these nodes to reach the destination using routing algorithm. Conclusion: In this paper, NoC architectures are reviewed using different parameters, detail information is also provided for these parameters. The NoC architectures reviewed are proposed and implemented in last more than a decade.

Background: This review paper synopsizes the recent efforts regarding the mitigation of the poor capacity performance of today’s transmission and distribution broadband over power lines (BPL) networks. In fact, this paper considers the broadband potential of transmission and distribution BPL networks when multiple repeaters are additively deployed between the transmitting and receiving ends of their existing cascaded BPL connections. Methodology: The contribution of this paper is three-fold. First, the broadband performance of a plethora of BPL connections with multi-hop repeater systems -either overhead (OV) or underground (UN), either high-voltage (HV) or medium-voltage (MV) or low-voltage (LV)- was investigated in terms of capacity and capacity outage probability (COP). Second, the adaptability to different capacity requirements was examined through the appropriate deployment of multi-hop repeater systems. Third, further integration of BPL connections with multi-hop repeater systems upgraded with multiple-input multiple-output (MIMO) capabilities is highlighted. This last contribution may act as a counteracting technique against the significant capacity losses due to different electromagnetic interference (EMI) policies adopted with the intention to suppress BPL EMI to other radio services. Result: Except for a low-cost and quick technology upgrade of today’s BPL networks, multi-hop repeater systems successfully deal with the majority of inherent BPL technology deficiencies, which have hindered widespread BPL technology adoption for decades.

Background: In order to design secure digital right management architecture between different producers and different consumers, this paper proposes a multiparty and multilevel watermarking protocol for primary and secondary market. Comparing with the traditional buyer-seller watermarking protocols, this paper makes several outstanding achievements. Method: First of all, this paper extends traditional buyer-seller two-party architecture to multiparty architecture which contains producer, multiply distributors, consumers, etc. Secondly, this paper pays more attention on the security issues, for example, this paper applies iris recognition technology as an advanced security method. Conclusion: Finally, this paper also presents a second-hand market scheme to overcome the copyright issues that may happen in the real world.

Background: A traction elevator system is analytically simulated in this paper, driven by an induction motor, in order to study possible energy saving modes of operation in terms of returning energy to the DC. Method: In order to reduce the total energy consumption of the system, the conventional braking system is replaced by a regenerative braking system, where the energy produced during braking is stored and not dissipated. This energy is transferred back to the DC-bus when there is high energy demand. Result: Two regenerative brake systems are simulated, with supercapacitors and with flywheel, and the results are compared to a real application’s measurements.

Background: The emergence of new video applications and beyond high-definition formats (e.g.,4k×2k or 8k×4k resolution) signifies the need to develop a new video coding standard that is more sophisticated than other existing standards, including H.264/AVC. The new standard must have higher coding efficiency than that of H.264/AVC. High efficiency video coding (HEVC) has been designed to address all existing applications of H.264/MPEG-4 AVC and focus on suitability for high-level aplications. Method: In this study, we compared the new HEVC standardization and the previous version (H.264/AVC). The two encoders and the different tools and algorithms used were also comprehensively investigated. Finally, a comparison between software and hardware implementation was conducted. This study provides a relevant new hardware architecture for HEVC (H.265) using the existing one for H.264/AVC. Result: Experimental results show that H.265/MPEG-HEVC provides significant average bitrate savings of 40.3% and 35.4% for interactive and entertainment applications, respectively, compared with H.264/MPEG-AVC.

Background: Based on observer-based method, this paper investigates robust control problem of a class of secondary regulation rotate speed systems with the state being not completely measurable. Method: By applying Hamiltonian function method and some existing results, we presented several new results on the issue. Firstly, to conveniently apply, the Hamiltonian realization method was given for general nonlinear systems. Then, by transforming the secondary regulation rotate speed system under study into its Hamiltonian form, we presented two results on the asymptotic stability and observer-based H∞ control problems. Conclusion: Finally, an illustrative example is given to show the effectiveness of the result obtained in this paper.