Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375571
Xinghua Tu, Z. Yin, Yue-chun Shi, Xiangfei Chen
Based on a sampled fiber Bragg grating, a novel approach to obtain high channel-count comb filters is proposed for wavelength-division-multiplexing (WDM) system in this letter. There is a non-continuous linear chirped structure like a ladder in grating period. And refractive index modulation amplitude with Hamming spatial profile is used within the samples. The 26-channel comb filter with channel spacing of 50GHz is then fabricated, it features in multiple equalized passbands with flat-top steep-edge and high transmittance which will benefit as multi-channel optical add/drop filters in WDM system.
{"title":"A novel sampled Bragg grating comb filter with a ladder chirped structure","authors":"Xinghua Tu, Z. Yin, Yue-chun Shi, Xiangfei Chen","doi":"10.1109/APCC.2009.5375571","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375571","url":null,"abstract":"Based on a sampled fiber Bragg grating, a novel approach to obtain high channel-count comb filters is proposed for wavelength-division-multiplexing (WDM) system in this letter. There is a non-continuous linear chirped structure like a ladder in grating period. And refractive index modulation amplitude with Hamming spatial profile is used within the samples. The 26-channel comb filter with channel spacing of 50GHz is then fabricated, it features in multiple equalized passbands with flat-top steep-edge and high transmittance which will benefit as multi-channel optical add/drop filters in WDM system.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122754818","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375517
Jaewoo Kim, Hyunduk Jung, Jaiyong Lee
Network Mobility (NEMO) supports the movement of some part of the network that a group of the Mobile Nodes (MNs) or the Mobile Routers (MRs) moves together. To support NEMO, the NEMO basic support protocol (NBSP) was proposed [1]. In the nested mobile network, however, the NBSP exhibits pinball routing problem. As the degree of nesting increase, the problem becomes more serious. In this paper, we propose a new NEMO management scheme using Tree-based Care of Address (TCoA) and Mobile Network Prefix (MNP). In proposed scheme, all the MRs belonging to the Root-MR in the nested mobile network configure their care-of addresses (CoA) based on the MNP of Root-MR. It mitigates the pinball routing problem. Performance analysis indicates that proposed scheme can reduce end-to-end packet delay and handoff delay.
NEMO (Network Mobility)是指一组移动节点(MNs)或移动路由器(MRs)一起移动网络的一部分。为了支持NEMO，提出了NEMO基本支持协议(NEMO basic support protocol, NBSP)[1]。然而，在嵌套移动网络中，NBSP存在弹球路由问题。随着嵌套程度的增加，问题变得更加严重。在本文中，我们提出了一种新的NEMO管理方案，使用基于树的地址保护(TCoA)和移动网络前缀(MNP)。在该方案中，在嵌套移动网络中，所有属于Root-MR的MRs都基于Root-MR的MNP来配置它们的照顾地址(CoA)。它减轻了弹球路由问题。性能分析表明，该方案可以降低端到端数据包延迟和切换延迟。
{"title":"Route optimization for network mobility with tree-based care of address","authors":"Jaewoo Kim, Hyunduk Jung, Jaiyong Lee","doi":"10.1109/APCC.2009.5375517","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375517","url":null,"abstract":"Network Mobility (NEMO) supports the movement of some part of the network that a group of the Mobile Nodes (MNs) or the Mobile Routers (MRs) moves together. To support NEMO, the NEMO basic support protocol (NBSP) was proposed [1]. In the nested mobile network, however, the NBSP exhibits pinball routing problem. As the degree of nesting increase, the problem becomes more serious. In this paper, we propose a new NEMO management scheme using Tree-based Care of Address (TCoA) and Mobile Network Prefix (MNP). In proposed scheme, all the MRs belonging to the Root-MR in the nested mobile network configure their care-of addresses (CoA) based on the MNP of Root-MR. It mitigates the pinball routing problem. Performance analysis indicates that proposed scheme can reduce end-to-end packet delay and handoff delay.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129062466","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375467
Y. Fukushima, Kazuya Inada, Y. Tao, Yasuyuki Fujiwara, T. Yokohira
In this paper, we evaluate the performance of peer selection algorithms: MLH (Minimum Logical Hop) and MPH (Minimum Physical Hop) to increase the number of joining peers and to decrease inter-AS traffic volume in P2P live streaming, where we assume that every peer's logical hop count (the number of providing peers between an origin streaming server and the peer) is limited by a predetermined value in order to keep real-time property of live streaming. In MLH, a newly joining peer selects such providing peers that the logical hop count is minimum to increase the number of joining peers. And then if there are several such providing peers, the newly joining peer selects such providing peers that the number (physical hop count) of ASs between the newly joining peer and each of the providing peers is minimum to decrease the inter-AS traffic volume. In MPH, a newly joining peer selects providing peers in the reverse order of MLH. Simulation results show that MLH achieves about from 20% to 60% more maximum joining peers than MPH, and MPH shows smaller inter-AS traffic volume than MLH when the number of joining peers is small while MLH shows smaller inter-AS traffic volume when the number of joining peers is large.
{"title":"Performance evaluation of as-friendly peer selection algorithms for P2P live streaming","authors":"Y. Fukushima, Kazuya Inada, Y. Tao, Yasuyuki Fujiwara, T. Yokohira","doi":"10.1109/APCC.2009.5375467","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375467","url":null,"abstract":"In this paper, we evaluate the performance of peer selection algorithms: MLH (Minimum Logical Hop) and MPH (Minimum Physical Hop) to increase the number of joining peers and to decrease inter-AS traffic volume in P2P live streaming, where we assume that every peer's logical hop count (the number of providing peers between an origin streaming server and the peer) is limited by a predetermined value in order to keep real-time property of live streaming. In MLH, a newly joining peer selects such providing peers that the logical hop count is minimum to increase the number of joining peers. And then if there are several such providing peers, the newly joining peer selects such providing peers that the number (physical hop count) of ASs between the newly joining peer and each of the providing peers is minimum to decrease the inter-AS traffic volume. In MPH, a newly joining peer selects providing peers in the reverse order of MLH. Simulation results show that MLH achieves about from 20% to 60% more maximum joining peers than MPH, and MPH shows smaller inter-AS traffic volume than MLH when the number of joining peers is small while MLH shows smaller inter-AS traffic volume when the number of joining peers is large.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131446414","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375564
X. Fu, Hongming Zhang, M. Yao
In this paper, a novel photonic analog-to-digital conversion method is proposed, theoretically analyzed and numerically simulated. This method features simple configuration, because only one polarization modulator, several polarization controllers and several polarizers are required. Furthermore, this method mitigated the problem of bias-drift, which is common in some previous intensity modulating schemes.
{"title":"A new proposal of photonic analog-to-digital conversion based on polarization modulator and polarizer","authors":"X. Fu, Hongming Zhang, M. Yao","doi":"10.1109/APCC.2009.5375564","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375564","url":null,"abstract":"In this paper, a novel photonic analog-to-digital conversion method is proposed, theoretically analyzed and numerically simulated. This method features simple configuration, because only one polarization modulator, several polarization controllers and several polarizers are required. Furthermore, this method mitigated the problem of bias-drift, which is common in some previous intensity modulating schemes.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133290643","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375602
Yu‐Lin Wang, M. Her, Chi-Feng Lin
The low noise and high gain differential Low Noise Amplifier (LNA) was designed for an IEEE 802.16 Worldwide Interoperability Microwave Access (WiMAX) application. This paper presents a 3.3 GHz to 3.8 GHz CMOS LNA with differential and cascode circuits to reduce the noise figure (NF) and enhance the gain. The LNA was fabricated with Taiwan Semiconductor Manufacturing Company (TSMC) 0.18 μm 1P6M standard CMOS process, the cascode technique can reduce the miller effect of gate-drain capacitor Cgd in order to enhance gain, and the active balun can enhance gain and reduce noise. The circuit performances were measured by using on-wafer test. The differential LNA exhibits that the noise figure is 3.3 dB ~ 3.8 dB from 3.3 GHz to 3.8 GHz, the maximum power gain S21 is 14.4±0.6 dB and S31 is 12.4 ± 0.5 dB. The output return loss S22 and S33 are less than −11 dB. The power consumption is 14.8 mW at VDD=1.2 V.
{"title":"Design and implementation of a differential LNA for WiMAX system","authors":"Yu‐Lin Wang, M. Her, Chi-Feng Lin","doi":"10.1109/APCC.2009.5375602","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375602","url":null,"abstract":"The low noise and high gain differential Low Noise Amplifier (LNA) was designed for an IEEE 802.16 Worldwide Interoperability Microwave Access (WiMAX) application. This paper presents a 3.3 GHz to 3.8 GHz CMOS LNA with differential and cascode circuits to reduce the noise figure (NF) and enhance the gain. The LNA was fabricated with Taiwan Semiconductor Manufacturing Company (TSMC) 0.18 μm 1P6M standard CMOS process, the cascode technique can reduce the miller effect of gate-drain capacitor C<inf>gd</inf> in order to enhance gain, and the active balun can enhance gain and reduce noise. The circuit performances were measured by using on-wafer test. The differential LNA exhibits that the noise figure is 3.3 dB ~ 3.8 dB from 3.3 GHz to 3.8 GHz, the maximum power gain S<inf>21</inf> is 14.4±0.6 dB and S<inf>31</inf> is 12.4 ± 0.5 dB. The output return loss S<inf>22</inf> and S<inf>33</inf> are less than −11 dB. The power consumption is 14.8 mW at V<inf>DD</inf>=1.2 V.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122614502","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375668
Shudong Fang, S. Berber, A. Swain
Closed-form expression of average Bit Error Rate (BER) is developed for Chip-Interleaved DS-CDMA system that conducts M-ary communication and non-coherent demodulation in AWGN channel with flat Rayleigh fading. The transmitter uses BPSK modulation and employs binary pseudo-random sequences for symbol-spreading. In receiver the non-coherent demodulation is based on the optimal quadrature demodulator to cancel the phase angles of received signals. Numerical results of simulations greatly agree with the analytical results of the developed expression.
{"title":"Closed-form average BER expression for chip-interleaved DS-CDMA system conducting M-ary communication and noncoherent demodulation in flat Rayleigh fading channel","authors":"Shudong Fang, S. Berber, A. Swain","doi":"10.1109/APCC.2009.5375668","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375668","url":null,"abstract":"Closed-form expression of average Bit Error Rate (BER) is developed for Chip-Interleaved DS-CDMA system that conducts M-ary communication and non-coherent demodulation in AWGN channel with flat Rayleigh fading. The transmitter uses BPSK modulation and employs binary pseudo-random sequences for symbol-spreading. In receiver the non-coherent demodulation is based on the optimal quadrature demodulator to cancel the phase angles of received signals. Numerical results of simulations greatly agree with the analytical results of the developed expression.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123886783","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375655
Ningbing Hou, Zhiqun Li
Conventional charge pumps (CPs) all share a problem of current mismatching, which dominates the phase noise of phase-locked loop (PLL). A high performance charge pump circuit in 0.18μm CMOS process is presented. A rail-to-rail error operational amplifier with reference circuit and self-biasing cascode current mirror enables the charge pump current to be well matched in a wide output voltage range. Simulation results show that the current mismatching can be less than 0.01% within output voltage range of 0.01V to 1.6V, with the charge pump current of 100μA. The circuit dissipates 3mW from a single 1.8-V supply.
{"title":"Design of high performance CMOS charge pump for phase-locked loops synthesizer","authors":"Ningbing Hou, Zhiqun Li","doi":"10.1109/APCC.2009.5375655","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375655","url":null,"abstract":"Conventional charge pumps (CPs) all share a problem of current mismatching, which dominates the phase noise of phase-locked loop (PLL). A high performance charge pump circuit in 0.18μm CMOS process is presented. A rail-to-rail error operational amplifier with reference circuit and self-biasing cascode current mirror enables the charge pump current to be well matched in a wide output voltage range. Simulation results show that the current mismatching can be less than 0.01% within output voltage range of 0.01V to 1.6V, with the charge pump current of 100μA. The circuit dissipates 3mW from a single 1.8-V supply.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121411688","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375652
Yan Ye, Taijun Liu, Kunsheng Ren, Xingbin Zeng
Generalized Hammerstein models can be used to accurately mimic the dynamic nonlinear behaviors of RF power amplifiers or transmitters. A high efficient parameter extraction algorithm for the generalized Hammerstein model is an essential problem for implementing the nonlinear model in a cheap microprocessor. In this paper, a modified systolic array based QRD-RLS algorithm, which is suitable for implementing in a FPGA-based soft-core microprocessor such as Altera NIOS II, is presented to extract the parameters of the generalized Hammerstein models of an RF power amplifier. The validation results based on a LDMOS power amplifier with a 4-carrier 3GPP WCDMA signal reveal that the modified systolic array based QRD-RLS algorithm can accurately identify the model parameters.
{"title":"Modified systolic array implementation of QRD-RLS algorithms for solving the generalized Hammerstein models","authors":"Yan Ye, Taijun Liu, Kunsheng Ren, Xingbin Zeng","doi":"10.1109/APCC.2009.5375652","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375652","url":null,"abstract":"Generalized Hammerstein models can be used to accurately mimic the dynamic nonlinear behaviors of RF power amplifiers or transmitters. A high efficient parameter extraction algorithm for the generalized Hammerstein model is an essential problem for implementing the nonlinear model in a cheap microprocessor. In this paper, a modified systolic array based QRD-RLS algorithm, which is suitable for implementing in a FPGA-based soft-core microprocessor such as Altera NIOS II, is presented to extract the parameters of the generalized Hammerstein models of an RF power amplifier. The validation results based on a LDMOS power amplifier with a 4-carrier 3GPP WCDMA signal reveal that the modified systolic array based QRD-RLS algorithm can accurately identify the model parameters.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128470677","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375492
D. Hu, M. Wang, F. Lau, Q. Peng
Random network coding based on the generation concept provides various benefits such as reduced system complexity. However, various generation updating processes used in general result in a throughput loss. In this paper, we propose a network coding scheme using a concept we call “generation crossing”. We also introduce a full cardinality precode, which enables the receiver to recover the lost packets when only a subset of the linearly independent encoded packets is received at the destination. We show that the successful delivery probability of all generations increases remarkably with a small number of overlapped packets between successive generations.
{"title":"A precoding scheme with generation crossing for network coding","authors":"D. Hu, M. Wang, F. Lau, Q. Peng","doi":"10.1109/APCC.2009.5375492","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375492","url":null,"abstract":"Random network coding based on the generation concept provides various benefits such as reduced system complexity. However, various generation updating processes used in general result in a throughput loss. In this paper, we propose a network coding scheme using a concept we call “generation crossing”. We also introduce a full cardinality precode, which enables the receiver to recover the lost packets when only a subset of the linearly independent encoded packets is received at the destination. We show that the successful delivery probability of all generations increases remarkably with a small number of overlapped packets between successive generations.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129051081","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}
Pub Date : 2009-10-08DOI: 10.1109/APCC.2009.5375560
Yunxiao Zhang, Z. Liao, Linjuan Zhao, Jiao-qing Pan, Wei Wang
A novel compact three port optically-controlled optical switch made by a waveguide uni-traveling-carrier photodiode integrated with a waveguide electro-absorption modulator on n-InP substrate was reported. The device, with a 450 Ω thin-film resistor and a bypass capacitor integrated on chip, demonstrates over 2GHz 3-dB bandwidth.
{"title":"Novel integrated waveguide PD/EAM photonic switch based on N-InP","authors":"Yunxiao Zhang, Z. Liao, Linjuan Zhao, Jiao-qing Pan, Wei Wang","doi":"10.1109/APCC.2009.5375560","DOIUrl":"https://doi.org/10.1109/APCC.2009.5375560","url":null,"abstract":"A novel compact three port optically-controlled optical switch made by a waveguide uni-traveling-carrier photodiode integrated with a waveguide electro-absorption modulator on n-InP substrate was reported. The device, with a 450 Ω thin-film resistor and a bypass capacitor integrated on chip, demonstrates over 2GHz 3-dB bandwidth.","PeriodicalId":217893,"journal":{"name":"2009 15th Asia-Pacific Conference on Communications","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115999461","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：