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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Korean Institute of Communications and Information Sciences
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The Korean Institute of Communications and Information Sciences
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Volume & Issues
Volume 38C, Issue 12 - Dec 2013
Volume 38B, Issue 12 - Dec 2013
Volume 38A, Issue 12 - Dec 2013
Volume 38C, Issue 11 - Nov 2013
Volume 38B, Issue 11 - Nov 2013
Volume 38A, Issue 11 - Nov 2013
Volume 38C, Issue 10 - Oct 2013
Volume 38B, Issue 10 - Oct 2013
Volume 38A, Issue 10 - Oct 2013
Volume 38C, Issue 9 - Sep 2013
Volume 38B, Issue 9 - Sep 2013
Volume 38A, Issue 9 - Sep 2013
Volume 38C, Issue 8 - Aug 2013
Volume 38B, Issue 8 - Aug 2013
Volume 38A, Issue 8 - Aug 2013
Volume 38C, Issue 7 - Jul 2013
Volume 38B, Issue 7 - Jul 2013
Volume 38A, Issue 7 - Jul 2013
Volume 38C, Issue 6 - Jun 2013
Volume 38B, Issue 6 - Jun 2013
Volume 38A, Issue 6 - Jun 2013
Volume 38C, Issue 5 - May 2013
Volume 38B, Issue 5 - May 2013
Volume 38A, Issue 5 - May 2013
Volume 38C, Issue 4 - Apr 2013
Volume 38B, Issue 4 - Apr 2013
Volume 38A, Issue 4 - Apr 2013
Volume 38C, Issue 3 - Mar 2013
Volume 38B, Issue 3 - Mar 2013
Volume 38A, Issue 3 - Mar 2013
Volume 38C, Issue 2 - Feb 2013
Volume 38B, Issue 2 - Feb 2013
Volume 38A, Issue 2 - Feb 2013
Volume 38C, Issue 1 - Jan 2013
Volume 38B, Issue 1 - Jan 2013
Volume 38A, Issue 1 - Jan 2013
Selecting the target year
Resource Allocation and IP Networking for Next Generation Military Satellite Communications System
Noh, Hong-Jun ; Go, Kwang-Chun ; Lee, Kyu-Hwan ; Kim, Jae-Hyun ; Lim, Jae-Sung ; Song, Ye-Jin ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 939~954
DOI : 10.7840/kics.2013.38C.11.939
Korean military is developing the next generation military satellite communications system in order to achieve the requirements of future military satellite communication such as high speed, high capacity, survivability, all IP networking, and on-the-move. In this paper, we survey and analyze the research interests about optimal resource allocation and IP networking such as MF-TDMA, random access, satellite IP routing, and PEP. Conventional researches have focused on the increase in channel throughput and efficiency. In addition to these measurements, we consider heterogeneous satellite terminals, full mesh topology, distributed network, anti-jamming, and the like which are the special characteristics of the next generation military satellite communications system. Based on this, we present key research issues and evaluation on the issues by simulation.
Performance Analysis of Link-16 Waveform considering Frequency Remapping under PBNJ
Lee, Kyuman ; Noh, Hongjun ; Lee, Jongkwan ; Lim, Jaesung ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 955~965
DOI : 10.7840/kics.2013.38C.11.955
The joint tactical information distribution system (JTIDS) is used as the communication terminal of Link-16 by the United States armed forces, north atlantic treaty organization (NATO), and other allied forces. A portion of Link-16 frequencies may be shortly remapped to other systems owing to the growing demand for frequencies, especially in civil aviation, which is witnessing a constant increase in air traffic. This will affect the performance of Link-16. Therefore, in this paper, we analyze the effect of frequency band reduction on the performance of Link-16 waveform under partial-band noise jamming with Nakagami fading, via simulation and numerical analysis. The multi-net and anti-jamming performance of Link-16 with frequency remapping is compared with that of conventional Link-16 systems. The results show that the performance of Link-16 waveform is degraded with the reduction in frequencies. Nonetheless, Link-16 retains its jam resistance, and it can support multiple users in the same time slots.
Military Entrance Control System Using Military Insignia UHF RFID Tags
Nam, Seahyeon ; Chung, You Chung ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 966~971
DOI : 10.7840/kics.2013.38C.11.966
This paper introduces development of a Military Entrance Control System using the developed military insignia UHF RFID tags. Generally, in the military entrance control system, the security identification (ID) card with HF RFID tag can be used, to increase the security level, the developed insignia UHF RFID tags are used in the enforced military entrance control system. The general metal insignias, have been worn on a hat or on the shoulder pads of a military uniforms, are simulated and developed as UHF RFID insignia tags. The military entrance control system can manage the name, rank, address (information of military personnel), time and date of entrance and the history of entrance of the security area.
Development of Stream Cipher using the AES
Kim, Sung-Gi ; Kim, Gil-Ho ; Cho, Gyeong-Yeon ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 972~981
DOI : 10.7840/kics.2013.38C.11.972
Future aspects of the has turned into a network centric warfare(NCW). Organically combined wired and wireless networks in a variety of cross-of-the-art combat power factor utilization of information and communication technology is a key element of NCW implementation. At used various information in the NCW must be the confidentiality and integrity excellent then quick situation assessment through reliability the real-time processing, which is the core of winning the war. In this paper, NCW is one of the key technologies of the implementation of 128-bit output stream cipher algorithm is proposed. AES-based stream cipher developed by applying modified OFB mode the confidentiality and integrity as well as hardware implementation to the security and real-time processing is superior.
Mount Location Simulation of UHF-Band Omni-Directional Antenna for Smart UAV
Song, Bok-Sob ; Lee, Hyeon-Cheol ; Kim, Seung-Bum ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 982~989
DOI : 10.7840/kics.2013.38C.11.982
Omni-directional antennas of UHF-Band are located on the top and bottom side of the Smart UAV in order to connect a link always. Therefore one of each antennas should be connected to a ground antenna. Because the communication link of the omni-directional antennas is influenced by the objectives around aircraft, the clearance of LOS(Line of Sight) should be achieved in order to avoid a loss of link. In this paper, the analysis results on the influence of the complex objectives placed around the antenna on the communication link are presented according to the change of attitude angles. The best positions of antennas are selected based on the electromagnetic analysis using XGTD tool which supports the modeling of antenna pattern. The flight tests of the Smart UAV were successfully performed with the selected antenna position.
Clinical Consideration of Visual Fatigue on 3D Images
Kim, Jung-Ho ; Son, Jeong-Sik ; Park, Sung-Jin ; Kwon, Soon-Chul ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 990~999
DOI : 10.7840/kics.2013.38C.11.990
Previous studies based on the theoretical evidence and based on the empirical data have been constantly revealing related factors affecting visual fatigue in viewing 3D images. however, the measurement data coupled with the factors that affect the viewers to feel fatigue is insufficient. this study research that the viewers feel the visual functional data is based on subjective fatigue such as IPD, AC/A ratio, and the degree of phoria and the effects on variance in these data, is to examine the correlation between these data. based on the average score of subjective fatigue which is
, total fatigue points from 0 up to 6 is classified as a group not appealing for the fatigue and from 7 up to 16, they were classified as the fatigue appealing group. the results showed no difference in satisfaction of the images by each subjective fatigue, IPD and far phoria. AC/A ratio was higher from the fatigue not appealing group, near phoria was higher from the fatigue appealing group. after watching 3D images, the fatigue not appealing group showed a tendency of higher increase of exophoria. correlations appeared in this experiment showed that AC/A ratio and near phoria are closely related to level of subjective fatigue which feel when watching 3D images. when watching 3D images based on two data appear to be able to predict the fatigue, even during content production fatigue reduce the data dimensions to be used as the main basis is expected.
Evaluation of Human Factors on Autostereoscopic 3D Viewing by Using Auditory Stimuli
Mun, Sungchul ; Cho, Sungjin ; Park, Min-Chul ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1000~1009
DOI : 10.7840/kics.2013.38C.11.1000
This study investigated changes in behavioral performance before and after watching a multi-view 3D content by using auditory stimuli based on the selective attention theory in order to quantitatively evaluate 3D visual fatigue. Twenty-one undergraduates were asked to report on their current visual and physical condition both in the pre- and post-experiment. A selective attention task was conducted before and after mobile 3D viewing to compare the changes in performance. After performing a Wilcoxon`s matched-pairs signed-ranks test on the subjective ratings of 3D visual fatigue, participants were categorized into two groups, unfatigued and fatigued group with a definite criterion. For the unfatigued group, no significant fatigue effects were found in behavioral response times and accuracies to specific auditory targets. In sharply contrast to the unfatigued group, the fatigued group showed significantly delayed response times and less response accuracies. However, no significant changes in accuracies for a working memory task were observed in both groups.
Seamless 2D-3D Switching Transmission System for Dual-Stream 3D TV Terrestrial Broadcasting
Park, Sung-Hwan ; Lee, Seung-Hyun ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1010~1018
DOI : 10.7840/kics.2013.38C.11.1010
The dual-stream based stereoscopic 3D broadcasting standard was developed in 2011. EBS broadcasted 3DTV experimental service according to this standard in April 2012. Dual-stream based 3DTV broadcasting is service-compatible and backward-compatible, so viewers who have legacy 2D HDTV can watch the broadcasting content as 2D. And 3DTV viewers can select watching 2D or 3D. Since 3D content production is not usual yet for terrestrial broadcasters, only some particular programs in specific periods will be broadcasted as 3D at the initiatory stage. For it, stable viewing condition is strongly required for both 2D viewers and 3D viewers. This paper suggests broadcasting transmission system structure and effective switching scheme for stable 2D and 3D viewing conditions in the case of dual-stream based terrestrial 3DTV broadcasting.
Scalable BWS Service for Hybrid DMB Data Broadcasting
Yun, Joungil ; Bae, Byungjun ; Song, Yun-Jeong ; Lim, Hyongsoo ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1019~1028
DOI : 10.7840/kics.2013.38C.11.1019
The BWS (broadcast website) data broadcasting service for terrestrial DMB (digital multimedia broadcasting) has a great advantage that it can provide a website like service through broadcast without web traffic to a plurality of receiving terminals. However, the value of BWS has not been recognized due to the development of mobile communication technology and changes in the environment, where mobile web services through smart devices such as smart phones and pads are common. Recently, various hybrid service technologies provided through hybrid broadcasting, a fusion of broadcasting and communications, have been developed. In this paper, we propose a scalable BWS dividing the hierarchy of BWS into transmission layers and present its application for hybrid DMB data broadcasting services.
Introduction and Performance Analysis of Approximate Message Passing (AMP) for Compressed Sensing Signal Recovery
Baek, Hyeong-Ho ; Kang, Jae-Wook ; Kim, Ki-Sun ; Lee, Heung-No ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1029~1043
DOI : 10.7840/kics.2013.38C.11.1029
We introduce Approximate Message Passing (AMP) algorithm which is one of the efficient recovery algorithms in Compressive Sensing (CS) area. Recently, AMP algorithm has gained a lot of attention due to its good performance and yet simple structure. This paper provides not only a understanding of the AMP algorithm but its relationship with a classical (Sum-Product) Message Passing (MP) algorithm. Numerical experiments show that the AMP algorithm outperforms the classical MP algorithms in terms of time and phase transition.
The Anti-Spoofing Methods Using Code Antiphase of Spoofing Signal
Kim, Taehee ; Lee, Sanguk ; Kim, Jaehoon ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1044~1050
DOI : 10.7840/kics.2013.38C.11.1044
This paper analyzes what is mitigated as spoofing attack using the U-Blox Receiver and GPS RF signal generator developed at ETRI. Generally the spoofing attack made the target receiver to be wrong navigation solution by providing false measurement of code and carrier. So we analyzed the impact of spoofing attack through the signal strength and navigation solution. In oder to test of effect of anti-spoofing signal, we consider the signal with antiphase code to spoofing signal and generated GPS normal signal and spoofing signal and anti-spoofing signal using GPS RF signal generator. This paper analyzed that the GPS receiver was responded to the spoofing attack according to code phase difference between spoofing and anti-spoofing signal. We confirmed that the spoofing signal was disappeared by anti-spoofing signal if code phase is an exact match.
Low Complexity LSD Scheme for Joint Iterative MIMO Detection
Ahmed, Saleem ; Kim, Sooyoung ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1051~1059
DOI : 10.7840/kics.2013.38C.11.1051
This paper proposes a complexity reduced list sphere decoding (LSD) scheme for joint iterative soft detection scheme for coded MIMO system. The conventional LSD scheme is based on searching the candidates with a fixed radius. However, once the candidate list is full, it is highly probable that the radius can be reduced. By reducing the radius, the complexity can be also reduced. We propose a simple and efficient radius update method for complexity reduction of list version sphere decoding and its application to iterative soft MIMO detection. We evaluate the performance of the proposed scheme with a joint soft-input-soft-ouput iterative MIMO detection in combination with turbo codes. Simulation results show that the proposed methods provide substantial complexity reduction while achieving similar bit error rate (BER) performance as the conventional LSD scheme.
Cluster-Based Routing Mechanism for Efficient Data Delivery to Group Mobile Users in Wireless Ad-Hoc Networks
Yoo, Jinhee ; Han, Kyeongah ; Jeong, Dahee ; Lee, HyungJune ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1060~1073
DOI : 10.7840/kics.2013.38C.11.1060
In this paper, we present a cluster-based routing scheme for efficiently delivering data to group mobile users by extracting and clustering mobile user group simply from beacon message information in wireless ad-hoc networks. First, we propose an online-clustering mechanism that uses a local neighbor table on each node by recursively transmitting to neighbor nodes, and forms a group table where a set of listed nodes are classified as group members, without incurring much overhead. A node that appears the most frequently from neighbor tables throughout the network is selected as the cluster-head node, serving as a data gateway for the intra-cluster. Second, we design an inter-cluster routing that delivers data from stationary data sources to the selected cluster-head node, and a intra-cluster routing to deliver from the cluster-head node to users. Simulation results based on ns-2 in the ad-hoc networks consisting of 518 stationary nodes and 20 mobile nodes show that our proposed clustering mechanism achieves high clustering accuracy of 96 % on average. Regarding routing performance, our cluster-based routing scheme outperforms a naive one-to-one routing scheme without any clustering by reducing routing cost up to 1/20. Also, our intra-cluster routing utilizing a selected cluster-head node reduces routing cost in half as opposed to a counterpart of the intra-cluster routing through a randomly-selected internal group member.
Mathematical Analysis for Efficiency of Eavesdropping Attack Using Directional Antenna in mmWave Band
Kim, Meejoung ; Kim, Jeong Nyeo ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1074~1077
DOI : 10.7840/kics.2013.38C.11.1074
This paper analyzes the benefit of using directional antennas against eavesdropping attack in millimeter wave (mmWave)-based networks. All devices are equipped with a directional antenna or an omni-directional antenna in a single-hop communications. The probability of a device being detected by an eavesdropper is analyzed based on the exposure region of a device. The relative detection rate is introduced to represent the benefit of using directional antenna. Numerical results show that there exists an optimal number of devices that maximizes the detection probability and it varies according to the parameters such as antenna beamwidth. It shows that the use of directional antenna enables to protect the devices from the detection by an eavesdropper for almost the whole situation in mmWave band communication.
Performance of Double Binary Turbo Coding for LED-ID Systems
Hwang, Yu-Min ; Kim, Kyung-Ho ; Kim, Jin-Young ;
The Journal of Korean Institute of Communications and Information Sciences, volume 38C, issue 11, 2013, Pages 1078~1083
DOI : 10.7840/kics.2013.38C.11.1078
At the ubiquitous age, applications of Wireless Personal Area Network (WPAN) technology using LEDs are in progress. However, visible light communication using LED have weakness, which deteriorates performance of communication. To reduce information losses, which is caused by optical noise, such as incandescent lamps, fluorescent lamps, sunbeam etc., proposed channel coding scheme, double binary turbo codes. In this paper, encoding scheme of the proposed system is described and simulation results are analyzed. We had expected improved performance by using double binary turbo codes. Finally, performances of the proposed system came up to our expectations.