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Int. J. Wirel. Opt. Commun.最新文献

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Suspended Center-Fed Slot-Loaded Plate Antennas 悬挂中心馈电槽加载板天线
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000082
T. See, Zhi Ning Chen
{"title":"Suspended Center-Fed Slot-Loaded Plate Antennas","authors":"T. See, Zhi Ning Chen","doi":"10.1142/S0219799503000082","DOIUrl":"https://doi.org/10.1142/S0219799503000082","url":null,"abstract":"This paper describes a dual-band suspended plate antenna having a balanced center-fed feeding configuration and a pair of slots near the radiating edges of the plate. The effects of slots on the impedance and radiation characteristics of the antenna are experimentally examined.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115983722","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
Dynamic Routing of Bandwidth Guaranteed Connections in MPLS Networks MPLS网络中带宽保证连接的动态路由
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000069
A. Capone, L. Fratta, F. Martignon
{"title":"Dynamic Routing of Bandwidth Guaranteed Connections in MPLS Networks","authors":"A. Capone, L. Fratta, F. Martignon","doi":"10.1142/S0219799503000069","DOIUrl":"https://doi.org/10.1142/S0219799503000069","url":null,"abstract":"Finding a path in the network for a new incoming connection able to guarantee some quality parameters such as bandwidth and delay is the task of QoS routing techniques developed for new IP optical networks based on label forwarding techniques such as Generalized Multiprotocol Label Switching (GMPLS). In this paper we focus on the routing of bandwidth guaranteed flows in a dynamic scenario where new connection requests arrive at the network edge nodes. When more than one path satisfying the bandwidth demand exists, the selection of the path aims at minimizing the blocking probability of future requests. We propose a new routing algorithm named Virtual Flow Deviation (VFD) which exploits the information of the ingress and egress nodes of the network and the traffic statistics. This new algorithm, in most scenarios, achieves remarkable reduction in the blocking probability with respect to previously proposed schemes.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131052943","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: 20
PLATO: A Generic Modeling Technique for Optical Packet-Switched Networks 光分组交换网络的一种通用建模技术
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000070
Shun Yao, B. Mukherjee, S. Dixit
{"title":"PLATO: A Generic Modeling Technique for Optical Packet-Switched Networks","authors":"Shun Yao, B. Mukherjee, S. Dixit","doi":"10.1142/S0219799503000070","DOIUrl":"https://doi.org/10.1142/S0219799503000070","url":null,"abstract":"This paper presents PLATO, an analytical technique to model the performance in all-optical packet-switched networks with various topologies and node architectures. Using this technique, we propose a two-part algorithm, incorporating mathematical analysis and a numeric method, to model the network's traffic flow and the local packet-loss probability inside each node. The PLATO technique has demonstrated excellent accuracy with two different representative network topologies and node architectures. It has considerably reduced the time required to evaluate the performance of all-optical packet-switched networks.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130613060","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: 9
QRD-RLS Adaptive Equalizer and its CORDIC-Based Implementation for CDMA Systems CDMA系统中QRD-RLS自适应均衡器及其cordic实现
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000033
T. Zhong, A. Madhukumar, F. Chin
{"title":"QRD-RLS Adaptive Equalizer and its CORDIC-Based Implementation for CDMA Systems","authors":"T. Zhong, A. Madhukumar, F. Chin","doi":"10.1142/S0219799503000033","DOIUrl":"https://doi.org/10.1142/S0219799503000033","url":null,"abstract":"To combat the performance deterioration brought by the time-varying propagation conditions and multiuser/intersymbol interference in the CDMA system, this paper proposes a novel means of adaptive equalizer based on QR Decomposition-based Recursive Least Square (QRD-RLS) algorithm to replace the conventional RAKE receiver. The RLS algorithm has been exploited due to its relatively superior convergence property in comparison with other adaptive filtering algorithms. However, the high quality brings about high computational complexity as well. With regards to such a side-effect, the CORDIC algorithm has been exploited and it plays an essential role in the hardware implementation of the new approach. The proposed RLS structure is simulated extensively under different channel parameters and performance is compared against traditional RAKE structure.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130889624","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: 10
Comparison of Quotiently Coherent QAM, Differentially Coherent QAM and Coherent QAM over Rayleigh Flat Fading Channel 瑞利平坦衰落信道上商相干QAM、差分相干QAM和相干QAM的比较
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000094
Mingwei Wu, Y. Chew, T. Tjhung
{"title":"Comparison of Quotiently Coherent QAM, Differentially Coherent QAM and Coherent QAM over Rayleigh Flat Fading Channel","authors":"Mingwei Wu, Y. Chew, T. Tjhung","doi":"10.1142/S0219799503000094","DOIUrl":"https://doi.org/10.1142/S0219799503000094","url":null,"abstract":"A quotient coded quadrature amplitude modulation system having only a finite number of transmitted signal amplitudes is proposed. The expression to estimate the Symbol-Error-Rate (SER) performance of the quotiently coherent demodulated QAM (QQAM) system over a multiplicative Rayleigh fading channel is obtained. The computed SERs are in close agreement with the results obtained from simulations and hence justifying the approximation made in modelling the noise at the output of the quotient decoder. We next propose a differentially coherent demodulated QAM (DQAM) system, and its performance is compared with the QQAM system through simulation. Finally, the performances of both the QQAM and DQAM systems are compared with the conventional coherent QAM system. Relative merits and shortcomings between the QQAM and the DQAM systems are discussed.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122912174","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 Novel Dual-Band Fiber Bragg Grating with Enhanced Side-Lobe Suppression Ratio by Using Triple Exposure Technique 利用三重曝光技术提高旁瓣抑制比的新型双频光纤布拉格光栅
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000045
Zhihong Li, Xiufeng Yang, Xin Guo, Q. Peng, Chao Lu, P. Shum, T. Cheng
{"title":"A Novel Dual-Band Fiber Bragg Grating with Enhanced Side-Lobe Suppression Ratio by Using Triple Exposure Technique","authors":"Zhihong Li, Xiufeng Yang, Xin Guo, Q. Peng, Chao Lu, P. Shum, T. Cheng","doi":"10.1142/S0219799503000045","DOIUrl":"https://doi.org/10.1142/S0219799503000045","url":null,"abstract":"A simple method was demonstrated to realize single/multi channel dual reflection peak fiber Bragg grating. By using novel triple exposure technique, the side-lobe suppression ratio of the grating pair in each channel increased to 15 dB with peak spacings of 0.25 nm.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130001241","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
"RF-SoC": Technology Enablers and Current Design Trends for Highly Integrated Wireless RF IC Transceivers “RF- soc”:高集成无线RF IC收发器的技术推动者和当前设计趋势
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000021
D. Lie, L. Larson
{"title":"\"RF-SoC\": Technology Enablers and Current Design Trends for Highly Integrated Wireless RF IC Transceivers","authors":"D. Lie, L. Larson","doi":"10.1142/S0219799503000021","DOIUrl":"https://doi.org/10.1142/S0219799503000021","url":null,"abstract":"The integration level of RFICs has exhibited dramatic progress during the last decade. For example, Si-based single-chip GSM/GPRS/DCS/PCS, WLAN, Bluetooth and DECT transceivers have all been reported in the past few years. The next major milestone for integration will be the single-chip RF-system-on-a-chip (i.e. \"RF-SoC\") product that supports multi-band multi-standard cellular standards (such as UMTS/GSM/GPRS/CDMA2000) with the wireless personal-area-network (PAN) and wireless-local-area-network (WLAN) features. To achieve this high level of RFIC integration, one has to choose radio circuit architectures that require a minimal number of external components, together with a judicious selection of the IC technology for implementation. Recent design trends on highly integrated wireless RFIC transceivers are reviewed, with emphasis on the RF-SoC performance trade-offs impacted by the chip-level architectural selection and the device-level technology choice. The major roadblocks to single-chip radio RFIC designs are briefly discussed.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124802473","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: 11
A Simple RLC/MAC Protocol Architecture for a Wireless IP Network 一种用于无线IP网络的简单RLC/MAC协议架构
Int. J. Wirel. Opt. Commun. Pub Date : 2003-06-01 DOI: 10.1142/S0219799503000057
J. Khan
{"title":"A Simple RLC/MAC Protocol Architecture for a Wireless IP Network","authors":"J. Khan","doi":"10.1142/S0219799503000057","DOIUrl":"https://doi.org/10.1142/S0219799503000057","url":null,"abstract":"This paper presents a simple RLC/MAC protocol architecture for a wireless IP (Internet Protocol) network. In order to support IP-based multimedia services in a wireless network, two different approaches can be used. One approach is to transmit end-to-end IP packets in a multi-hop network, such as a cellular mobile telephone network. In this case IP packets can be transmitted on high data rate air interfaces using a suitable IP header compression technique. Another possibility is to transmit non-IP packets from a UE to a BTS using standard 2G/3G air interfaces. IP packets can be generated at a BTS by encapsulating received MAC packets on an uplink. On a downlink, an IP packet received from a RAN is fragmented at a BTS for further transmission using a standard air interface. This paper first reviews the end-to-end IP packet transmission strategy based on IP header compression techniques. Next a simple RLC/MAC protocol architecture for a wireless IP network is proposed. The proposed protocol architecture is suitable for generating IP packets at a BTS by encapsulating MAC packets. IP packet encapsulation delay at a BTS is minimized by using a reservation-based MAC protocol. The MAC protocol uses class-based reservation and priority queuing techniques to satisfy QoS needs of different classes of traffic. The RLC protocol is mapped onto the MAC protocol to minimize signaling overhead. The proposed RLC/MAC layer is simple, flexible, and generates minimum signaling load to maintain high QoS for multimedia traffic. Performance of the RLC/MAC protocol is analyzed using a simulation model.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128137728","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 Wideband Hybrid Printed Monopole/Rectangular Patch Antenna 宽带混合印刷单极子/矩形贴片天线
Int. J. Wirel. Opt. Commun. Pub Date : 1900-01-01 DOI: 10.1142/S0219799507000552
M. Suma, P. C. Bybi, P. Mohanan
{"title":"A Wideband Hybrid Printed Monopole/Rectangular Patch Antenna","authors":"M. Suma, P. C. Bybi, P. Mohanan","doi":"10.1142/S0219799507000552","DOIUrl":"https://doi.org/10.1142/S0219799507000552","url":null,"abstract":"This paper deals with a novel hybrid antenna configuration for broadband application. Broadband performance is achieved by electromagnetically exciting a planar rectangular patch with rear-mounted strip monopole antenna. The antenna has an overall dimension of 40.5 × 45 × 3.2 mm3 including the feed line and the ground plane. The reflection and radiation characteristics of the prototype antenna exhibits a 2:1 VSWR bandwidth of 40%, an average gain of ~ 7.1 dBi and good radiation coverage. The parametric analysis of the antenna and the design criteria for a compact broad band are also presented in this paper.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129510056","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
Microstrip-Fed Dual Band Folded Dipole Antenna for DCS/PCS/2.4 GHz WLAN Applications 用于DCS/PCS/2.4 GHz WLAN应用的微带馈电双带折叠偶极子天线
Int. J. Wirel. Opt. Commun. Pub Date : 1900-01-01 DOI: 10.1142/S0219799507000527
M. Joseph, R. K. Raj, M. Suma, C. Aanandan, K. Vasudevan, P. Mohanan
{"title":"Microstrip-Fed Dual Band Folded Dipole Antenna for DCS/PCS/2.4 GHz WLAN Applications","authors":"M. Joseph, R. K. Raj, M. Suma, C. Aanandan, K. Vasudevan, P. Mohanan","doi":"10.1142/S0219799507000527","DOIUrl":"https://doi.org/10.1142/S0219799507000527","url":null,"abstract":"A compact dual band folded dipole antenna printed on either side of a substrate and excited by a 50 Ω microstrip line with a truncated ground plane covering DCS/PCS/2.4 GHz WLAN bands is presented. In the proposed design, a microstrip-fed folded monopole antenna is first designed and then modified it to a microstrip-fed folded dipole by placing another folded arm on the opposite side of the substrate extending from the ground plane, for achieving dual resonance. The antenna resonating at 1.87 GHz and 2.46 GHz has 2:1 VSWR bandwidth of 17% and 9% respectively. The proposed antenna offers 53% area reduction compared to a standard rectangular microstrip antenna. Details of the antenna design and experimental results are presented.","PeriodicalId":185917,"journal":{"name":"Int. J. Wirel. Opt. Commun.","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131551273","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
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