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A design of programmable AC voltage and current generators for testing energy meters 用于电能表测试的可编程交流电压电流发生器的设计
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1412690
Sarawoot Methawee, E. Leelarasmee
{"title":"A design of programmable AC voltage and current generators for testing energy meters","authors":"Sarawoot Methawee, E. Leelarasmee","doi":"10.1109/APCCAS.2004.1412690","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1412690","url":null,"abstract":"A prototype equipment that generates two AC sources of the same frequency for testing single phase energy meters is described. Their amplitudes, frequency and phase shift can be set through a keyboard pad. It consists of reference signal generators and amplifiers. The reference signal is generated using a microcontroller and two serial 16 bit digital to analog converters. The amplifiers use power transformers and feedback opamp circuits. The circuit can generate programmable 180-250 V/sub rms/ (1V/step) and 0.2-50 A/sub rms/ (0.1A/step) sources with 0.1% full scale error and 2% harmonic distortion. Its frequency can be adjusted from 45-55 Hz (0.1 Hz/step) with 0.1% error. The phase is also adjustable from 0-360 degree with 1 degree/step.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126719008","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
Design of partially adaptive STBC CDMA receiver using conjugate gradient algorithm 基于共轭梯度算法的部分自适应STBC CDMA接收机设计
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1412778
Gau-Joe Lin, T. Lin, Ta-Sung Lee
{"title":"Design of partially adaptive STBC CDMA receiver using conjugate gradient algorithm","authors":"Gau-Joe Lin, T. Lin, Ta-Sung Lee","doi":"10.1109/APCCAS.2004.1412778","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1412778","url":null,"abstract":"A novel partially adaptive (PA) receiver with MAI suppression is proposed for an STBC CDMA system under the multipath fading channels. A low-complexity PA realization of the receiver is developed based on the generalized sidelobe canceller (GSC) technique which partial adaptivity is incorporated via the conjugate gradient (CG) algorithm for reduced complexity implementation. The proposed PA receiver is evaluated through simulations, and the results show that it can achieve nearly the same performance of the conventional fully adaptive MMSE receiver by using a small number of pilot symbols","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126349954","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 parent search method in peer-to-peer media streaming networks 点对点媒体流网络中的父搜索方法
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1413024
Lei Zhang, K. Lo
{"title":"A parent search method in peer-to-peer media streaming networks","authors":"Lei Zhang, K. Lo","doi":"10.1109/APCCAS.2004.1413024","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1413024","url":null,"abstract":"Providing media streaming services over a peer-to-peer (P2P) network has attracted much attention in recent few years. In this paper, we focus on a tree structured P2P network for live media streaming. In our proposed P2P framework, the Prim-Dijkstra algorithm is used to construct the network spanning tree. A new fast parent searching method based on network triangle inequality is then developed for the newly arrived peers to join the P2P media streaming network. Simulation results show that the complexity of the parent searching procedure is greatly reduced using the proposed method.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126500468","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 stable multi-level partitioning algorithm using adaptive connectivity threshold 基于自适应连通性阈值的稳定多级分区算法
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1412676
Jin-kuk Kim, J. Chong, S. Goto
{"title":"A stable multi-level partitioning algorithm using adaptive connectivity threshold","authors":"Jin-kuk Kim, J. Chong, S. Goto","doi":"10.1109/APCCAS.2004.1412676","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1412676","url":null,"abstract":"This work presents a new efficient and stable multi-level partitioning algorithm for VLSI circuit design. As the most previous multi-level partitioning algorithms force experimental constraints on the process of hierarchy construction, the stability of their performance goes down. We minimize the use of experimental constraints and propose a new method for constructing partition hierarchy. The proposed method clusters the cells with the connection status of the circuit. In addition, we indicate the weakness of previous algorithms where they used a uniform method for choice of cells during the improvement. To solve the problem, we propose a new IIP (iterative improvement partitioning) technique that selects the method to choose cells according to the improvement status. The experimental result on ACM/SIGDA benchmark circuits show improvement up to 2-56% in minimum cutsize over previous algorithm and our technique outperforms hMetis by 2-9% in minimum cutsize.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121384173","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
All in one 315MHz ASK UHF receiver 所有在一个315MHz问UHF接收机
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1413013
Yang-Han Lee, Jiann-Jong Chen, Chao-Chung Huang, Cheng-Ming Shih, Hsuan-Fan Chen
{"title":"All in one 315MHz ASK UHF receiver","authors":"Yang-Han Lee, Jiann-Jong Chen, Chao-Chung Huang, Cheng-Ming Shih, Hsuan-Fan Chen","doi":"10.1109/APCCAS.2004.1413013","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1413013","url":null,"abstract":"An all in one integrated 315 MHz ASK UHF receiver is proposed in this paper. This receiver is a monolithic ultra-high frequency (UHF) receiver including radio-frequency (RF) front-end, intermediate-frequency (IF) stage, base-band stage and final filter without any spiral inductor. The proposed receiver was implemented with UMC 0.5 /spl mu/m CMOS DPDM processes. The sensitivity of the proposed receiver is -73 dBm. Its data rate can be operated at 2.4 kbits. The power consumption of this chip is 65 mW. The chip size is 1370/spl times/1370 /spl mu/m/sup 2/.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121003446","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
Downlink base transmit station modulator in WCDMA system WCDMA系统中的下行基站调制器
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1412995
Kai-Hao Bai, Shih-Hsu Huang
{"title":"Downlink base transmit station modulator in WCDMA system","authors":"Kai-Hao Bai, Shih-Hsu Huang","doi":"10.1109/APCCAS.2004.1412995","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1412995","url":null,"abstract":"The WCDMA system is one of the main modulations used in the third generation mobile communication. In this paper, we present a new modulation structure for downlink base transmit station in WCDMA system. The new architecture has the following functional blocks: VQ separation, channel mapping, spreading and scrambling, SCH code generation, 48-tap pulse shaping filter, gain and snm, and timing generator. Implementation data shows that our approach works well in the complex spreading spec” system LINTRODUCTION According to the statistics from ITU investigation, there were 5 billion users of mobile phone in the late 2000’s. It’s about a half of the users of the wired phone. Some prediction also shows that the users of the mobile phone will be more than the nsers of the wired phone, and will be popular in 2005. Moreover, the combination of wireless communication and consumer electronic is a trend in the future. Therefore, offering a wideband and high-speed environment with multiple services is an important requirement for future wireless communication systems. The 3G mobile communication system is emphasized in the functions of multimedia services. The transmitting speed is from 384 Kbps to 2 Mbps. The leading system technologies are W-CDMA, the UTRA (W-CDMA and TD-CDMA), and the CDMAZOO. Since these three systems are so different, the organizations of 3GPP (3rd Generation Partnership Project) and 3GPP2 (3rd generation Partnership Project 2) are sponsored to coordinate these standards and make them interoperable. This paper presents a new architecture of downlink base transmit station (BTS) modulator in WCDMA system. For the simulation results, we find that our architecture can achieve the requirement of 3GPP. Section 2 introduces the 3GPP downlink BTS modulator specification. Section 3 introduces the transmitting method of the modulator. Section 4 presents the function blocks of the modulator and their interfaces. Section 5 gives the simulation results. Finally, in section 6, we give some concluding remarks.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121155459","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
Representation of 1/f signal via multiwavelet bases 用多小波基表示1/f信号
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1412699
Xiao-jiang Yan, Guizhong Liu, Feng Liu
{"title":"Representation of 1/f signal via multiwavelet bases","authors":"Xiao-jiang Yan, Guizhong Liu, Feng Liu","doi":"10.1109/APCCAS.2004.1412699","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1412699","url":null,"abstract":"The representation of 1/f signal via multiwavelet transformation has been explored in this paper. It is shown that 1/f signal (not near-1/f signal) can be represented by multiwavelet synthetic formula and also the property of a statistically self-similar signal can be characterized by the matrix of correlation functions of multiwavelet coefficients in multiwavelet domain. The representation of 1/f signal with wavelet bases is only the special case of this paper.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116683799","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
Filter design of a servomotor encoder 伺服电机编码器的滤波器设计
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1412976
Ming-Syhan Wang, Jian-Hao Chen, Shih-Hao Wang
{"title":"Filter design of a servomotor encoder","authors":"Ming-Syhan Wang, Jian-Hao Chen, Shih-Hao Wang","doi":"10.1109/APCCAS.2004.1412976","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1412976","url":null,"abstract":"The design and implementation of a set of three linear phase finite impulse response (FIR) filters to prevent the noise from corrupting the output signals of servomotor encoders is proposed. According to the estimated speed, one of the FIR filter is selected to eliminate the noise with a width less than three sample periods and/or with a frequency less than one fifth of the sampling frequency. Simulations and experiments at speeds of 30 rpm, 300 rpm, and 1000 rpm are given. These results illustrate the effectiveness of the designed FIR filters.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123744210","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
Realization of a systematic bit-wise decomposition metric 一个系统的逐位分解度量的实现
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1413067
Chia-Wei Chang, Po-Ning Chen, Y.S. Han
{"title":"Realization of a systematic bit-wise decomposition metric","authors":"Chia-Wei Chang, Po-Ning Chen, Y.S. Han","doi":"10.1109/APCCAS.2004.1413067","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1413067","url":null,"abstract":"In this paper, a realization structure for our previously proposed systematic recursive formula for bitwise decomposition of M-ary symbol metric is proposed, which can be applied to reduce the memory space and processing latency of a system where the information sequence is binary-coded and interleaved before M-ary modulated. Different from conventional structure where de-interleaver and decoder are separate circuits, our structure de-interleaves and decodes at the same time.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123757345","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
Video quality enhancement for Motion JPEG2000 encoding based on the human visual system 基于人眼视觉系统的Motion JPEG2000编码视频质量增强
The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI: 10.1109/APCCAS.2004.1413091
R. Miyamoto, Y. Hayashi, H. Tsutsui, T. Masuzaki, T. Onoye, Y. Nakamura
{"title":"Video quality enhancement for Motion JPEG2000 encoding based on the human visual system","authors":"R. Miyamoto, Y. Hayashi, H. Tsutsui, T. Masuzaki, T. Onoye, Y. Nakamura","doi":"10.1109/APCCAS.2004.1413091","DOIUrl":"https://doi.org/10.1109/APCCAS.2004.1413091","url":null,"abstract":"A novel Motion JPEG2000 encoding method is proposed, which is based on the human visual system being insensitive to high frequency component of image. This method enhances subjective video quality by controlling bitrate of each region, such as a tile or a code-block, or each wavelet coefficient according to its amount of motion. The proposed method can encode video streams whose subjective quality is the same as that by existing method at lower bitrate.","PeriodicalId":426683,"journal":{"name":"The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124898706","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
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