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IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.最新文献

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Low power 5GHz quadrature phase CMOS LC oscillator with active inductor 带有源电感的低功耗5GHz交相CMOS LC振荡器
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413887
J. Foo, R. Weber
{"title":"Low power 5GHz quadrature phase CMOS LC oscillator with active inductor","authors":"J. Foo, R. Weber","doi":"10.1109/ISCIT.2004.1413887","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413887","url":null,"abstract":"A low power 5 GHz LC quadrature phase VCO with active inductor is designed and fabricated in standard 0.18 /spl mu/m single-poly, six metal layer mixed-signal CMOS process. Active inductors are used in the design to diminish chip area consumption. Results based on post layout simulations are presented. Circuits are currently being fabricated through the MOSIS Educational Program. The core VCO dissipates 6.86 mW on a 1.8 V power supply. The whole circuit has an output power of -2.956 dBm. Simulated phase noise is shown as -74.6 dB/Hz at 1MHz offset and -102.3 dB/Hz at 10 MHz offset.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130147985","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
Soft handoff technique for downlink IP packet transmissions in cellular environments 蜂窝环境下下行IP分组传输的软切换技术
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413897
A.K.K. Mori, H. Kobayashi
{"title":"Soft handoff technique for downlink IP packet transmissions in cellular environments","authors":"A.K.K. Mori, H. Kobayashi","doi":"10.1109/ISCIT.2004.1413897","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413897","url":null,"abstract":"A soft handoff scheme is very helpful to minimize the service disruption in CDMA IP wireless networks. In the conventional soft handoff scheme the downlink throughput performance decreases due to fading; this is because the base station transmits packets even in bad channel conditions. This work presents a new soft handoff scheme for the downlink IP packet transmissions where the system throughput could be efficiently improved. The proposed scheme focuses on the fact that the IP packets do not have stringent delay requirements; it aims to support the guaranteed delivery of IP packets along the network.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"54 49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134454127","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
Development of a multimedia mobile processor 多媒体移动处理器的开发
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413800
M. Fukase, Y. Nakamura, R. Akaoka, T. Sato
{"title":"Development of a multimedia mobile processor","authors":"M. Fukase, Y. Nakamura, R. Akaoka, T. Sato","doi":"10.1109/ISCIT.2004.1413800","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413800","url":null,"abstract":"Handheld devices, like cellular phones and PDA (personal digital assistants), have succeeded mainly through the power conscious design of mobile processors. This has resulted in a lack of performable features compared with PCs. Yet, the trend of handheld devices in recent years has been to add sophisticated functions for multimedia processing. Since such a scheme has relied on a software approach, it is hard to achieve high speed with low power. Setting up the drastic throughput of 1 GIPS (10/sup 9/ instructions/sec) and 1 W power dissipation to meet the demand for power, speed, and usability, we have developed a Java-embedded mobile processor core named gorilla. This paper focuses on the design approach to one of gorilla's derivatives using 0.35 /spl mu/m CMOS standard cell technology.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130949830","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
Sustainable electrical energy - wind energy conversion into electrical energy with RNSIC converter 可持续电能——利用RNSIC转换器将风能转化为电能
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413842
I. Pletea, D. Alexa
{"title":"Sustainable electrical energy - wind energy conversion into electrical energy with RNSIC converter","authors":"I. Pletea, D. Alexa","doi":"10.1109/ISCIT.2004.1413842","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413842","url":null,"abstract":"The paper presents a wind generator system based on an original converter configuration with almost sinusoidal currents (RNSIC). A detailed analysis of the system for different load currents is presented and the advantages of the proposed solution are emphasized.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132436569","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
Ant colony optimization for best path planning 蚁群算法的最优路径规划
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412460
Y. Hsiao, Cheng-Long Chuang, Cheng-Chih Chien
{"title":"Ant colony optimization for best path planning","authors":"Y. Hsiao, Cheng-Long Chuang, Cheng-Chih Chien","doi":"10.1109/ISCIT.2004.1412460","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412460","url":null,"abstract":"The paper presents an optimal approach to search the best path of a map considering the traffic loading conditions. The main objective of this work is to minimize the path length to get the best path planning for a given map. This study proposes a solution algorithm based on the ant colony optimization technique to search the shortest path from a desired origin to a desired destination of the map. The proposed algorithm is implemented in C++. Furthermore, the simulation program can randomly generate maps for evaluating its flexibility and performance. Simulation results demonstrate that the proposed algorithm can obtain the shortest path of a map with fast speed.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114465773","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: 64
Compatibility between devices using ultra-wideband technology and TD-SCDMA systems 使用超宽带技术和TD-SCDMA系统的设备之间的兼容性
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413877
Long Zhao, Cheng-lin Zhao, Zheng Zhou
{"title":"Compatibility between devices using ultra-wideband technology and TD-SCDMA systems","authors":"Long Zhao, Cheng-lin Zhao, Zheng Zhou","doi":"10.1109/ISCIT.2004.1413877","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413877","url":null,"abstract":"This paper analyzes UWB's influence on the coverage of TD-SCDMA cells. A distributional model of UWB is made firstly. Then the relationship between TD-SCDMA cell coverage and UWB transmit power and is obtained through computer simulation. It turns out that more base stations are needed when UWB devices are applied, but the summary of the transmitted power is all the same.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114661030","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
Bit error rate of a digital radio eavesdropper on computer CRT monitors 计算机CRT显示器上数字无线电窃听器的误码率
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413889
Shiwei Dong, Jiadong Xu, Chenjiang Guo
{"title":"Bit error rate of a digital radio eavesdropper on computer CRT monitors","authors":"Shiwei Dong, Jiadong Xu, Chenjiang Guo","doi":"10.1109/ISCIT.2004.1413889","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413889","url":null,"abstract":"An eavesdropper on computer CRT (cathode ray tube) monitors can be used to intercept video information. Its anti-noise performance is analyzed in this paper. Baseband transmission models of digital signals are established according to the operating principle of the eavesdropper. The relationship between the eavesdropper's bit error rate and some parameters, such as intercept distance, superposition times and noise power, is discussed under the circumstances of ISI and ISI-freedom. Good agreement is obtained between experimental results and theoretical analysis.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"148-149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117175482","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
An image-quality guaranteed watermarking scheme with spreading spectrum of watermark 一种水印扩频保证图像质量的水印方案
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412863
T. Tachibana, M. Fujiyoshi, H. Kiya
{"title":"An image-quality guaranteed watermarking scheme with spreading spectrum of watermark","authors":"T. Tachibana, M. Fujiyoshi, H. Kiya","doi":"10.1109/ISCIT.2004.1412863","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412863","url":null,"abstract":"This paper proposes a novel watermarking scheme that spreads spectrum of a watermark by selecting a different DCT (discrete cosine transform) coefficient each block in embedding a watermark element. This scheme generates watermarked images with desired objective image-quality in terms of the peak signal-to-noise ratio, and extracts an embedded watermark without any reference images. By randomizing the coefficient selected in each block, the proposed scheme is able to change the subjective image-quality of a watermarked image independently of the objective image-quality as well as malicious detection of the embedding coefficients becomes difficult.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125777733","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
Optimal timeslot allocation for multi-cell CDMA/TDD systems supporting voice and data 支持语音和数据的多小区CDMA/TDD系统的最佳时隙分配
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1412448
Kun-Nyeong Chang, Ki-Dong Lee
{"title":"Optimal timeslot allocation for multi-cell CDMA/TDD systems supporting voice and data","authors":"Kun-Nyeong Chang, Ki-Dong Lee","doi":"10.1109/ISCIT.2004.1412448","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1412448","url":null,"abstract":"The integrated voice and data CDMA/TDD system with unbalanced timeslot allocation is a highly attractive solution to support the next generation mobile systems with unbalanced multimedia traffic. In this paper, we mathematically formulate an optimal timeslot allocation problem for the integrated voice and data CDMA/TDD system as a nonlinear integer programming problem, which is to maximize the system capacity under the given traffic imbalance. We also propose an efficient heuristic algorithm based on the simulated annealing technique. Extensive experimental results show that the proposed heuristic algorithm works very well and the system capacity of the CDMA/TDD system with unbalanced timeslot allocation is larger than that of the CDMA/TDD system with balanced timeslot allocation.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126164279","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
Theoretical ground reflection model for UWB communication systems 超宽带通信系统的理论地面反射模型
IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004. Pub Date : 2004-10-26 DOI: 10.1109/ISCIT.2004.1413910
S. Promwong, J. Takada, P. Supanakoon, P. Tangtisanon
{"title":"Theoretical ground reflection model for UWB communication systems","authors":"S. Promwong, J. Takada, P. Supanakoon, P. Tangtisanon","doi":"10.1109/ISCIT.2004.1413910","DOIUrl":"https://doi.org/10.1109/ISCIT.2004.1413910","url":null,"abstract":"In this paper, the theoretical ground reflection model for UWB communication systems is proposed. The passband rectangular pulse with specific center frequency and bandwidth is used as the transmitted signal. The complex form Friis' transmission formula is applied for the UWB ground reflection channel. The received signal is evaluated. The UWB path loss is defined as the ratio between the maximum amplitude of the transmitted and received signal waveforms. The closed form path loss expression is derived. For the data processing, the path loss and rms delay spread of the ground reflection model are considered for the 1.00, 0.10 and 0.01 m antenna heights. The double linear regression for the path loss is modeled by using the first Fresnel zone and MMSE break points. The rms delay spread as a function of the antenna height and the path loss is investigated. The characteristics of the path loss and rms delay spread are discussed in the paper.","PeriodicalId":237047,"journal":{"name":"IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129478729","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: 17
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