2015 IEEE 12th Malaysia International Conference on Communications (MICC)最新文献_第2页

Some new results on the asymptotic analysis for diversity receivers 关于分集接收机渐近分析的一些新结果

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725459

E. Adebola, A. Annamalai

引用次数: 0

Mutual impedance with finite feed gap model of dipole antennas using the induced EMF method 用感应电动势法建立偶极子天线有限馈隙相互阻抗模型

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725409

N. A. Malek, A. Jusoh, K. Badron, A. F. Ismail

{"title":"Mutual impedance with finite feed gap model of dipole antennas using the induced EMF method","authors":"N. A. Malek, A. Jusoh, K. Badron, A. F. Ismail","doi":"10.1109/MICC.2015.7725409","DOIUrl":"https://doi.org/10.1109/MICC.2015.7725409","url":null,"abstract":"Mutual coupling in antenna arrays bring a significant impact especially when antenna elements are placed close with each other. It affects antenna performance, communication capacity and so on. Likewise, an accurate analysis of mutual coupling which can be expressed in terms of mutual impedance is important. A few analytic approaches for mutual impedance between two dipoles are available, one of it is the Induced EMF method. The Induced EMF method is accurate for short and thin, with an infinitesimal feed gap, which is impractical. A finite feed gap which is practical, can be modeled using electromagnetic simulation approaches. However, no analytical techniques are available to compare the results of the design with numerical software. The finite feed gap modelling of the mutual impedance using the Induced EMF method will be highlighted in this paper. The results are compared with other electromagnetic software. Then, the effect of the finite feed gap model has been observed in the far field pattern of dipole antenna arrays and they are in good agreement with other electromagnetic software.","PeriodicalId":225244,"journal":{"name":"2015 IEEE 12th Malaysia International Conference on Communications (MICC)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126327981","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

FEXT and NEXT analysis for VDSL2 technology on 50 twisted pairs TM copper cable 50双绞线TM铜缆上VDSL2技术的ext和NEXT分析

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725429

M. A. F. Musa, N. Zamani, A. Asrokin, N. Hashim, W. M. I. Wan Mohamed Said, A. N. Zainal Abidin

引用次数: 3

A novel low complexity high efficiency hybrid PAPR reduction for OFDM systems 一种新型的低复杂度、高效率的OFDM系统混合PAPR降低方法

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725460

Khalid Al-Hussaini, B. Ali, P. Varahram, S. Hashim

{"title":"A novel low complexity high efficiency hybrid PAPR reduction for OFDM systems","authors":"Khalid Al-Hussaini, B. Ali, P. Varahram, S. Hashim","doi":"10.1109/MICC.2015.7725460","DOIUrl":"https://doi.org/10.1109/MICC.2015.7725460","url":null,"abstract":"In this paper, we propose a novel hybrid multiplicative-additive technique to reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. This technique consists of two inverse fast Fourier transform (IFFT) blocks. The input symbols of the first IFFT are the mapped symbols, whereas the input symbols of the second IFFT are the summations of the absolute value of the real part of the outer signal constellation points and zeros symbols. First, the output of the two IFFT blocks is partitioned into four subblocks, which are subsequently used to rearrange the subblocks with padding zeros in a specific manner. Then, a new optimization scheme is introduced, in which only a single two-phase sequence and four iterations needs to be applied. Numerical analysis shows that the hybrid proposed technique achieves better bit error rate (BER) and PAPR reduction performance than partial transmit sequences (PTS) multiplicative technique and tone reservation (TR) additive PAPR technique. The other salient feature of this scheme is that no side information (SI) is needed which increases transmission efficiency.","PeriodicalId":225244,"journal":{"name":"2015 IEEE 12th Malaysia International Conference on Communications (MICC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127680667","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: 7

Ionospheric disturbances triggered by solar flare events during solar maximum — May 2013 2013年5月太阳极大期耀斑事件引发的电离层扰动

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725432

Mohd Masri Abd Rashid, M. Ismail, Alina Marie Hasbie, R. Nordin

{"title":"Ionospheric disturbances triggered by solar flare events during solar maximum — May 2013","authors":"Mohd Masri Abd Rashid, M. Ismail, Alina Marie Hasbie, R. Nordin","doi":"10.1109/MICC.2015.7725432","DOIUrl":"https://doi.org/10.1109/MICC.2015.7725432","url":null,"abstract":"A solar flare is a huge explosion in the sun's atmosphere. It produces a powerful burst of radiations which can severely affect the Earth's ionosphere and a wide range of radio communication services. One of the methods used to study the effect of solar flare is by continuously monitor and measure the Very Low Frequency (VLF 3-30 kHz) radio waves signal. Short term analyses of the data recorded by AWESOME receiver at Universiti Kebangsaan Malaysia, for the period of April to May, 2013 were presented. There were 5 solar flare events with classes greater than M1 (X-ray flux ≥ 1.0 × 10-5W/m2) recorded by GOES satellite which created 20 VLF perturbations during the observation period. Results indicated that the enhancement of X-ray radiation from the sun during the solar flare event was capable to generate VLF perturbations as high as 10 dB in amplitude and 85 degrees in phase signals. Three Transmitter Receiver Great Circle Paths (TRGCPs) propagating VLF signal over land and sea at frequencies 19.8, 22.2 and 21.4 kHz were analyzed simultaneously. The data from all TRGCPs confirmed the association between solar flare event and VLF ionospheric disturbances. The correlation coefficient between the solar flare X-ray flux intensity and the magnitude of the VLF perturbations for the studied flare event are presented.","PeriodicalId":225244,"journal":{"name":"2015 IEEE 12th Malaysia International Conference on Communications (MICC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132641705","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

Exploitation of the electromagnetic band gap (EBG) in 3-dB multi-layer branch-line coupler 3db多层支路耦合器中电磁带隙的开发

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725445

N. M. Jizat, Z. Yusoff, S. Rahim, M. Sabran, M. Islam

{"title":"Exploitation of the electromagnetic band gap (EBG) in 3-dB multi-layer branch-line coupler","authors":"N. M. Jizat, Z. Yusoff, S. Rahim, M. Sabran, M. Islam","doi":"10.1109/MICC.2015.7725445","DOIUrl":"https://doi.org/10.1109/MICC.2015.7725445","url":null,"abstract":"An advanced shift that driven with high carrier frequencies, wide bandwidths, device densities, unique numbers, universal high-rate coverage and a seamless user experience present future 5G air interface and spectrum together with LTE is currently experiencing an explosive growth in the communication world. This letter presents performance improvement of multi-layer slot coupled 3 dB Branch-Line Coupler (BLC) with the integration of electromagnetic band gap into the design. The proposed BLC is simulated on a Rogers RT/duroid 5880 with permittivity of 3.38 and designed to operate at 7 GHz. A configuration of uniplanar compact electromagnetic band-gap (UC-EBG) structures is exploited to serve as a slot coupled ground to reduce mutual coupling between the radiating elements and to achieve a higher operating resonance frequency. The periodic structure of electromagnetic band gap (EBG) is considered in RF-microwave industry due to their extraordinary surface wave suppression property. The proposed BLC delivered simulated coupling and transmission values of 3.12 and 4.04 dB, respectively. The impedance bandwidths (BW) of the BLC significantly increase to 120% when integrated with an EBG slot coupled ground plane. The proposed BLC design was accomplished in multilayer microstrip-slot technology by employing coupling technique. Ultimately, these applications produce wide operational bandwidth in which the BLC will serves as an essential key beam forming network element for future 5G wireless communications.","PeriodicalId":225244,"journal":{"name":"2015 IEEE 12th Malaysia International Conference on Communications (MICC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122330808","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: 6

Amplify-and-forward relaying to improve capacity and error rate at destination terminal 放大和转发中继，以提高容量和误码率的目的终端

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725450

Olalekan Bello, H. Zen, A. Othman, Khairuddin Abd Hamid

引用次数: 2

Fuzzy-logic based NSR DBA for upstream GPON 基于模糊逻辑的上游GPON NSR DBA

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725428

Yasmin Asilah Mahmud, N. Radzi, F. Abdullah, N. M. Din

引用次数: 8

A novel scheduling algorithm based class-service using game theory for LTE network 基于博弈论的LTE网络分类服务调度算法

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725461

Ayman Hajjawi, M. Ismail, N. Abdullah, N. Ramli

引用次数: 7

Performance analysis of DCO-OFDM in VLC system DCO-OFDM在VLC系统中的性能分析

2015 IEEE 12th Malaysia International Conference on Communications (MICC) Pub Date : 2015-11-01 DOI: 10.1109/MICC.2015.7725427

A. Abdulkafi, M. Y. Alias, Yaseein Soubhi Hussein

{"title":"Performance analysis of DCO-OFDM in VLC system","authors":"A. Abdulkafi, M. Y. Alias, Yaseein Soubhi Hussein","doi":"10.1109/MICC.2015.7725427","DOIUrl":"https://doi.org/10.1109/MICC.2015.7725427","url":null,"abstract":"The performance of indoor visible light communication (VLC) systems using a direct current-biased optical orthogonal frequency division multiplexing (DCO-OFDM) scheme is investigated in this paper. The impact of nonlinearity of Light Emitting Diode (LED) and its beam angle on the VLC system performance is studied. We later analyze the effect of modulation order, number of subcarriers, signal scaling and biasing operation on the peak to average power ratio (PAPR) which is a major issue in OFDM based VLC system. Simulation results show that the bit error rate (BER) decreases as the degree of nonlinearity increases and a better BER can be achieved as the LED behavior approaches linear model. In addition, it is shown that reducing the QAM order or increasing the number of subcarriers may reduce the effect of the LED nonlinearity, thus improving the BER performance of the VLC system. Moreover, it is demonstrated that PAPR is higher for a large number of subcarriers and modulation order. Finally, the PAPR of the visible light OFDM system can significantly be reduced by employing the signal scaling combined with biasing operation.","PeriodicalId":225244,"journal":{"name":"2015 IEEE 12th Malaysia International Conference on Communications (MICC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124855992","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: 30