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2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)最新文献

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Throughput and fairness enhancement based resource allocation scheme for underlay cognitive radio networks 基于吞吐量和公平性增强的底层认知无线网络资源分配方案
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305780
Kyrillos Youssef, N. Messiha, M. Abd-Elnaby
{"title":"Throughput and fairness enhancement based resource allocation scheme for underlay cognitive radio networks","authors":"Kyrillos Youssef, N. Messiha, M. Abd-Elnaby","doi":"10.1109/JEC-ECC.2017.8305780","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305780","url":null,"abstract":"Achieving good throughput and reducing interference to primary users (PUs) are key objectives for secondary users in a cognitive radio (CR) network. This paper proposes a centralized subcarrier allocation scheme with associated power allocation mechanism for underlay multi-user orthogonal frequency division multiplexing (MU-OFDM) taking into consideration the interference and rate loss that the PU can tolerate. The main target of the proposed scheme is to efficiently distribute the available subcarriers among cognitive users to maximize the cognitive network throughput while preserving the QoS for the PUs. The proposed algorithm achieves a significantly higher CR network throughput than that of the conventional interference power constraint IPC based schemes and the achieved throughput significantly increases as the number of CR users increases. Simulation results show that the proposed algorithm achieves a good performance in terms of fairness and spectrum efficiency.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123099850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A novel UWB double layer lotus wearable antenna for integration on astronauts spacesuit 一种用于航天员宇航服集成的新型超宽带双层荷叶式可穿戴天线
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305797
M. Ahmed, M. F. Ahmed, A. A. Shaalan
{"title":"A novel UWB double layer lotus wearable antenna for integration on astronauts spacesuit","authors":"M. Ahmed, M. F. Ahmed, A. A. Shaalan","doi":"10.1109/JEC-ECC.2017.8305797","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305797","url":null,"abstract":"In this paper a novel ultra-wideband double layer lotus wearable antenna is proposed for integration onto a flight jacket of the astronaut to monitor the vital signals of astronauts continually. This antenna designed and fabricated on leather material as substrate to operate over frequency band (2–12 GHz). The dielectric constant εr = 1.79, and loss tangent tanδ = 0.042 of the leather substrate are measured by using two different methods. This antenna is integrated with three strip lines for performance enhancement. Also, the SAR calculations for this antenna are performed on-body environments to ensure that operate properly in the nearness of the human body.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124197694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Efficient MPSK demodulator and phase recovery system for wireless communication 用于无线通信的高效MPSK解调器和相位恢复系统
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/jec-ecc.2017.8305793
M. Saber
{"title":"Efficient MPSK demodulator and phase recovery system for wireless communication","authors":"M. Saber","doi":"10.1109/jec-ecc.2017.8305793","DOIUrl":"https://doi.org/10.1109/jec-ecc.2017.8305793","url":null,"abstract":"An efficient demodulator and phase recovery system for phase shift keying (M-PSK) modulation scheme in wireless receivers has been designed and implemented. Stability, accuracy, simple structure, low power consumption compared to conventional methods such as Costas loop, are the main features provided by the proposed system. Different simulations using the Matlab program indicate that, the proposed system decreases the phase estimation time, and lowers the bit error rate (BER) compared to conventional method. The proposed architecture implemented on a field programmable gate array (FPGA) board. The implementation results indicate, that the proposed system reduced the power consumption by 28%, and works at a clock frequency faster by 67%, compared to traditional Costas loop architecture.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129321167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sparse representation classification via fast matching pursuit for face recognition 基于快速匹配追踪的稀疏表示分类人脸识别
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305788
Michael M. Abdel-Sayed, Ahmed K. F. Khattab, M. Abu-Elyazeed
{"title":"Sparse representation classification via fast matching pursuit for face recognition","authors":"Michael M. Abdel-Sayed, Ahmed K. F. Khattab, M. Abu-Elyazeed","doi":"10.1109/JEC-ECC.2017.8305788","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305788","url":null,"abstract":"Face recognition is a widely studied pattern recognition problem. One of the most crucial components of face recognition problems is classification. Sparse representation-based classification (SRC) has been recently proposed to considerably improve the classification performance by using the compressed sensing theory. However, SRC utilizes ℓ1 minimization for recovery. Despite being optimal, ℓ1 minimization is computationally expensive, and hence, not applicable in real-time applications. In this paper, we present the Fast Matching Pursuit (FMP) which is a compressed sensing recovery algorithm that results in a recognition time that is only 4% to 10% of that of ℓ1 minimization and approximately half the time of existing related matching pursuit approaches. This significant speedup does not come at the expense of any degradation in the recognition rate.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132097040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Enhanced digital predistorter based on normalized least mean square and particle swarm optimization algorithms 基于归一化最小均方和粒子群优化算法的增强型数字预失真器
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305770
Omar Z. Alngar, W. El-Deeb, El-Sayed M. El-Rabaie
{"title":"Enhanced digital predistorter based on normalized least mean square and particle swarm optimization algorithms","authors":"Omar Z. Alngar, W. El-Deeb, El-Sayed M. El-Rabaie","doi":"10.1109/JEC-ECC.2017.8305770","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305770","url":null,"abstract":"In this paper, two modified digital predistorters based on particle swarm optimization and normalized least mean square algorithms are introduced. The proposed algorithms reduce the non-linearity and memory effects that cause in-band distortions and increase the spectral regrowth in adjacent channels. the first proposed algorithm solves the convergence guarantees by the local search caused by particle swarm optimization. The second algorithm solves the same problem and improves the full random distributed particles defined in the swarm, simultaneously. Simulation results of the two proposed algorithms are demonstrated and compared with the conventional particle swarm optimization algorithm, traditional normalized least mean square algorithm and also compared with each other.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130489966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Proposals for packet processing and performance evaluation of IoT devices 物联网设备的分组处理和性能评估建议
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305766
T. Yokotani, Akihiro Shimuzu, Yuya Sasaki, H. Mukai
{"title":"Proposals for packet processing and performance evaluation of IoT devices","authors":"T. Yokotani, Akihiro Shimuzu, Yuya Sasaki, H. Mukai","doi":"10.1109/JEC-ECC.2017.8305766","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305766","url":null,"abstract":"In the Internet of Things (IoT), data blocks from a large number of sensors are packetized by IoT devices located at the network's edge and are transferred across networks. Although the transmission capacity and processing power of network equipment have been enhanced recently, packetized schemes should also be optimized, considering that several hundred billion IoT devices will be connected to networks by 2020. This paper proposes packetized schemes for IoT devices that use ZigBee, which is a promising candidate for the implementation of IoT area networks. In the proposed schemes, data blocks from many sensors are aggregated and bundled into a packet. The performance of these schemes is discussed, and their implementation in a prototype system is described to demonstrate their validity.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130907963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Hand gesture recognition based on dimensionality reduction of histogram of oriented gradients 基于方向梯度直方图降维的手势识别
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305792
Rania A. Elsayed, M. Sayed, M. Abdalla
{"title":"Hand gesture recognition based on dimensionality reduction of histogram of oriented gradients","authors":"Rania A. Elsayed, M. Sayed, M. Abdalla","doi":"10.1109/JEC-ECC.2017.8305792","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305792","url":null,"abstract":"Hand Gesture Recognition (HGR) system has become essential tool for deaf-dumb people to interact with normal users via computer system. This paper proposes robust and fast system for HGR that is based on dimensionality reduction of histogram of oriented gradients feature vectors by applying principal component analysis without losing performance, besides reducing computational cost and memory requirements. Multi-class Support Vector Machine (SVM) and k-Nearest Neighbors (KNN) classifiers are used to classify the hand gestures. The proposed algorithm achieves average recognition rate of 97.69% under different hand poses and complex background with changes in lightning. Our proposed algorithm reduces gesture matching computational cost and memory requirements by 98.6%. Experimental results show that average accuracy with KNN classifier are better than with SVM classifier. The results also show that our descriptor is robust against multiple variations such as rotation, scale, translation, and lighting while provides good performance.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131130504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A low phase noise, high figure of merit, 3.1 GHz–3.5 GHz ring oscillator using edge injection technique 采用边缘注入技术的3.1 GHz - 3.5 GHz环形振荡器，相位噪声低，性能因数高
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305773
K. Yousef
{"title":"A low phase noise, high figure of merit, 3.1 GHz–3.5 GHz ring oscillator using edge injection technique","authors":"K. Yousef","doi":"10.1109/JEC-ECC.2017.8305773","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305773","url":null,"abstract":"This paper presents the design of low phase noise, high figure of merit (FoM), and low power injection locked ring oscillator (ILRO) in 0.18 μm CMOS technology. Edge injection technique has been adopted for ring oscillator (RO) phase noise suppression and performance enhancement. Edge injection helps improving the oscillator jitter performance while maintaining spurious harmonics minimized. In addition, implementing the proposed RO using identical NAND delay stages simplifies the design and improves frequency oscillation adjustment. The proposed injection locked oscillator (ILO) has an oscillation frequency of 3.3 GHz with fine tuning range of 400 MHz. This ILO achieves a phase noise of −120.2 dBc/Hz at 1 MHz offset. It consumes only 4.4 mW from a 1.8 V DC power source. The proposed ILRO can achieve a FoM of −184.1 dBc/Hz.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132945050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
An ultralow-power high-gain biopotential amplifier for electromyogram signal recording 一种用于肌电信号记录的超低功率高增益生物电位放大器
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305772
Ehab A. Hamed, M. Atef, M. Abbas
{"title":"An ultralow-power high-gain biopotential amplifier for electromyogram signal recording","authors":"Ehab A. Hamed, M. Atef, M. Abbas","doi":"10.1109/JEC-ECC.2017.8305772","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305772","url":null,"abstract":"This paper introduces a design for an ultralow-power electromyogram (EMG) signal amplifier with low noise operation. The design consists of two stages, the first stage is highly efficient but supply-sensitive single ended amplifier and the second stage is differential, to improve the supply rejection ratio and common mode rejection ratio. Each stage is configured with cascode MOSFET transistors to increase the gain value. The proposed design is simulated by 130 nm CMOS, and its results are reported. The design achieves 60.62 dB mid-band gain with bandwidth of 1.72kHz. Using a supply voltage of 1.1 V, the amplifier consumes 1.03 μA of current. Input referred noise is 3.006 μVrms. The common mode and power supply rejection ratios are above 49.05 dB and 55.72 dB respectively.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128405980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A compact ultra-wide band microstrip patch antenna designed for Ku/K bands applications 一种紧凑的超宽带微带贴片天线，专为Ku/K波段应用而设计
2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC) Pub Date : 2017-12-01 DOI: 10.1109/JEC-ECC.2017.8305784
A. Ghattas, E. Khaled
{"title":"A compact ultra-wide band microstrip patch antenna designed for Ku/K bands applications","authors":"A. Ghattas, E. Khaled","doi":"10.1109/JEC-ECC.2017.8305784","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2017.8305784","url":null,"abstract":"A proximity feed ultra-wide band (UWB) patch antennas with a compact size (millimetres size) for Ku/K band applications is presented. Defected ground structure (DGS) technique is employed to enlarge the bandwidth of the antenna. The proposed antenna introduces UWB performance in the frequency range of 16 GHz to 29 GHz with a compact size of 7 × 10 mm2, which is suitable for many applications. The analysis and design of the proposed antenna are investigated with the commercially available software CST microwave studio (MWS) simulator. The proposed design is fabricated and tested. The measured data of the fabricated antenna demonstrates a very good agreement with the simulated results. The proposed antenna shows omnidirectional radiation pattern with an average gain of 3.5 dBi and good radiation efficiency over the operating band.","PeriodicalId":406498,"journal":{"name":"2017 Japan-Africa Conference on Electronics, Communications and Computers (JAC-ECC)","volume":"18 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129031183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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