INDUSTRIAL IOT: FROM EDGE COMPUTING TO AI
2019 (In preparation)
D.-S. Kim and H. D. Tran, Springer, 2019
INDUSTRIAL SENSOR AND CONTROLS IN COMMUNICATION NETWORKS
2018
D.-S. Kim and H. D. Tran, Springer
실시간 미들웨어 DDS의 기초 및 응용(BASICS AND APPLICATION OF REAL-TIME MIDDLEWARE DDS)
2019 (in preparation)
D.-S. Kim , M.Y. Son, and etc.
DESIGN AND IMPLEMENTATION OF 100GB/S OPTICAL TRANSCEIVER FIRMWARE FOR OPTICAL COMMUNICATION SYSTEM
Journal of KICS, 2019
In this paper, an efficient firmware design scheme is proposed for 100G CFP(C form-factor pluggable) optical transceiver based on MSA(Multi-Source Agreement) standard for Optical Transceiver. The proposed method uses FPGA approach to design for integration of CFP communication interface and register structure, and uses MCU to implement the operation function of CFP optical transceiver. In order to verify the implemented firmware according to the proposed design scheme, a real TestBed was constructed and verified the effectiveness through performance verification. It is expected that the proposed scheme can be applied to type of the 200/400G CFP optical transceiver in the future.
This paper emphasizes a method for improving spectral efficiency based on small cells (SCs) deployed in an existing macrocell (MC), which ultimately results in overall enhancement of the network capacity and coverage area. In addition, it allows an unlicensed secondary network to deliver messages through opportunistic access to the licensed network spectrum. By deploying SCs, users either inside or outside high residential buildings and/or commercial buildings can acquire signals during communications without interruption. The connectivity in the alliance of the two-tier networks becomes abundant, resulting in spectral efficiency improvement. In this paper, we first recall performance based on the Vandermonde-subspace frequency division multiplexing (VFDM) spectrum-sharing technique for spectrum management under both conventional (single-user) and enhanced scenarios; subsequently, the proposed method is introduced for comparison purposes. The performance of both methods is manifested in simulation results for the achievable rate, which demonstrate that the proposed approach outperforms enhanced VFDM and is a potential candidate in next-generation cellular technology. The motivation for the preference for SC deployment in the proposed approach is due to worthy characteristics (low power, low cost, very light weight, and self-organization). Unlike MCs, which need a considerable budget, they are installed anywhere without a lot of expense, and hence, save the network infrastructure.
This paper proposes an impulse radio ultrawideband (IR-UWB) sensor network channel model techniques for next generation wireless avionic systems (NGWAS). The Boeing's aircraft wing systems are considered for the deployment of the proposed scheme. The IR-UWB technique aims at alleviating the aforementioned drawbacks by selecting the best path from the available paths on the basis of bit error rate (BER). The cooperative relaying scheme which is implemented here to conduct the path selection process is a promising technique for communication of multiple distant sensor nodes and it also minimizes delay, and maximize packet delivery whilst providing a strong signal strength. This paper also investigates and compares the performances of the IR-UWB standardized channels in four different model environments of CM1 to CM4. It is understandable that the current redundant wired links in the avionic system industry would be substantially reduced as a result of the IR-UWB wireless implementation, while an increased throughput performance would be maintained.
In this paper, a novel, high-capacity and transparent blind audio watermarking system based on rounding reduced-arc M-ary phase shift keying (MPSK) is presented. Signal samples of the audio file are divided into several frames and then transformed into the frequency domain using fast Fourier transform. The watermark is embedded in the phase element of the selected samples based on several criteria. Two modified modulation schemes (256-PSK and binary phase shift keying) are used for the embedding process to compare the effects of the M-ary number used in the system. To improve the system, a genetic algorithm is utilized to obtain the best embedding parameters, which produces the optimal output based on the perceptual quality of the watermarked audio and the robustness of the extracted watermark. Experimental results show that the proposed audio watermarking system produces high-quality watermarked audio while loading a huge amount of data.