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1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)最新文献

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Multiple input/multiple output (MIMO) equalization for space-time block coding 空时分组编码的多输入/多输出均衡
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799546
Won-Joon Choi, J. Cioffi
{"title":"Multiple input/multiple output (MIMO) equalization for space-time block coding","authors":"Won-Joon Choi, J. Cioffi","doi":"10.1109/PACRIM.1999.799546","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799546","url":null,"abstract":"In this paper, we propose to combine space-time block codes (ST-BC) with multiple input multiple output equalizer (MIMO-EQ) for achieving transmit diversity in a frequency selective Rayleigh fading channel. In the proposed system, MIMO-EQ equalizes the channel into a temporal intersymbol interference (ISI)-free channel, and then a simple linear processing is used to perform the maximum likelihood (ML) decoding for ST-BC. Our simulation results show that the proposed system can achieve the full spatial diversity gain.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132997852","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: 28
An improved wavelet-packet-division multiple access system 一种改进的小波分组多址系统
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799584
J. Monera-Llorca, W. Lu, V. Bhargava
{"title":"An improved wavelet-packet-division multiple access system","authors":"J. Monera-Llorca, W. Lu, V. Bhargava","doi":"10.1109/PACRIM.1999.799584","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799584","url":null,"abstract":"An improved wavelet-packet-division multiple access (WPDMA) system is presented. In a WPDMA environment, each message signal is waveform coded onto a wavelet function to enhance the immunity of the system against interference. We propose a wavelet design method based on numerical optimization to mitigate the effects of asynchronism in the system. In brief, the algorithm consists of two parts: (a) identification of the feasible region, and (b) use of a quasi-Newton search algorithm to find the minimizer. By employing this technique, we found the optimal wavelet function which minimizes the interference due to timing errors. The advantages of the proposed WPDMA design algorithm with respect to a previously reported procedure are discussed.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125840724","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 adaptive control mechanism for the DQDB CO data service DQDB CO数据服务的自适应控制机制
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799490
L. Orozco-Barbosa, X. Tao, A. Gupta
{"title":"An adaptive control mechanism for the DQDB CO data service","authors":"L. Orozco-Barbosa, X. Tao, A. Gupta","doi":"10.1109/PACRIM.1999.799490","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799490","url":null,"abstract":"The connection oriented data service (CO service) has been defined by the IEEE 802.6 committee to support variable-bit-rate (VBR) data services over DQDB MANs. The main aim of the CO service is to be able to guarantee the QoS required by a wide variety of VBR services. We derive an adaptive bandwidth allocation control mechanism for the DQDB CO data service. Simulation results demonstrate the effectiveness of the proposed mechanism in providing the guarantees on the throughput required by the applications under changing network conditions.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125939514","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
Error concealment techniques for H.263 video transmission H.263视频传输中的错误隐藏技术
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799530
D. Kwon, P. Driessen
{"title":"Error concealment techniques for H.263 video transmission","authors":"D. Kwon, P. Driessen","doi":"10.1109/PACRIM.1999.799530","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799530","url":null,"abstract":"Error resilient video transmission over such unreliable channels as wireless and Internet has became an important research issue especially with the increasing interests in mobile multimedia communication over the next generation wideband networks. Error detection and concealment techniques, which are applicable to such block-based motion estimation video coders as H.263 and MPEG, are proposed. An error concealment scheme by post-processing to hide visual artifacts and residual errors is utilized at the decoder. Those techniques recovering the damaged areas based on characteristics of image and video signals are implemented using both spatial interpolation and temporal motion estimation. Based on the international standard H.263, experimental results including video transmission characteristics over noisy channels are presented for a bit rate of 9.6kbps and QCIF resolution. It is shown that the proposed error concealment technique by post-processing enhances the decoder performance in terms of the reconstructed image quality represented by PSNR and doesn't require sacrifice of system overhead.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127798773","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
Analysis of cochannel interference in angle modulation systems 角度调制系统中的共信道干扰分析
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799493
J. Chow, N. Beaulieu
{"title":"Analysis of cochannel interference in angle modulation systems","authors":"J. Chow, N. Beaulieu","doi":"10.1109/PACRIM.1999.799493","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799493","url":null,"abstract":"To increase the channel capacity of cellular mobile radio systems, the cell size is decreased to enable greater frequency reuse. Consequently, as the cell size is decreased, cochannel interference (CCI) becomes a dominant impairment in system performance rather than additive white Gaussian noise (AWGN). Thus, precise CCI models are important in the analysis of such systems. This paper presents an exact CCI model for angle modulation systems. The model is valid for digital binary and M-ary modulations as well as analogue modulations in slow Rayleigh fading.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129427973","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
Fault tolerance analysis of odd-even transposition sorting networks 奇偶变换排序网络的容错分析
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799500
S. Salloum, A. L. Perrie
{"title":"Fault tolerance analysis of odd-even transposition sorting networks","authors":"S. Salloum, A. L. Perrie","doi":"10.1109/PACRIM.1999.799500","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799500","url":null,"abstract":"Sorting networks are important hardware and software models of parallel sorting operations. They have several applications such as ATM switching, distributed processing, and optical implementation of sorting. In this paper we investigate the fault-tolerance properties of a special class of sorting networks called the odd-even transposition sorting networks. These networks have a simple and reliable hardware structure, which is easy to implement with VLSI technology. A simulation program of these networks' operation has been developed in C++. The simulation results revealed two important properties of odd-even transposition sorting networks: Any single stuck-at-X fault occurring in an internal comparator is redundant. And any two stuck-at-X faults occurring in a large number of internal comparators is redundant.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126433944","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
Impact of power control error on PN acquisition performance for a code-division-multiple-access system 码分多址系统电源控制误差对PN采集性能的影响
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799605
J.Y. Kim
{"title":"Impact of power control error on PN acquisition performance for a code-division-multiple-access system","authors":"J.Y. Kim","doi":"10.1109/PACRIM.1999.799605","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799605","url":null,"abstract":"In this paper, the impact of power control error on PN acquisition performance is evaluated for a CDMA system in a fading channel. A parallel acquisition scheme is adopted since it achieves faster acquisition than serial acquisition schemes. Acquisition performance is evaluated in terms of mean acquisition time, and acquisition-based capacity is discussed. It is shown that the imperfect power control increases mean acquisition time substantially when the standard deviation of received power is above 1 dB. The results in this paper can be applied to the reverse link design of a CDMA system.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"284 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124543749","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: 3
Power simulation using test sets: An experimental analysis 使用测试集的功率模拟:实验分析
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799578
A. Macii, E. Macii
{"title":"Power simulation using test sets: An experimental analysis","authors":"A. Macii, E. Macii","doi":"10.1109/PACRIM.1999.799578","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799578","url":null,"abstract":"It happens often that designers utilize test sets for power simulation. This choice has three advantages: First, test vectors can be easily generated by efficient ATPG tools. Second, the number of patterns included in test sets is usually limited; this implies short simulation times. Third, since test vectors tend to sensitize most of the internal nodes of a circuit, a good distribution of the samples considered for power analysis is guaranteed. Unfortunately, using test vectors for power simulation has a drawback: In normal operation mode, only the most common functionalities of a circuit are exercised. On the contrary, test sets tend to sensitize a larger number of behaviors; therefore, there may be cases in which estimation results are not very accurate. In this paper, we provide results of an experimental investigation we have carried out on the use of test sets for power simulation. We report comparative data for standard benchmark circuits; in addition, we consider a realistic case study for which input streams can be generated using RTL simulation.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121268284","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
Performance analysis of a wireless multiple access scheme with network assisted diversity and ARQ control 具有网络辅助分集和ARQ控制的无线多址方案的性能分析
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799489
Ruifeng Zhang, M. Tsatsanis
{"title":"Performance analysis of a wireless multiple access scheme with network assisted diversity and ARQ control","authors":"Ruifeng Zhang, M. Tsatsanis","doi":"10.1109/PACRIM.1999.799489","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799489","url":null,"abstract":"Network-assisted diversity multiple access (NDMA) is a previously proposed multiple media access method, which provides excellent throughput efficiency for multiplexing variable-bit-rate data sources. It exploits diversity combining and signal separation techniques borrowed from the signal processing problem to recycle the information in those collided data packets, so as not to introduce throughput penalties. In this paper, we take into account the ARQ mechanism superimposed on the NDMA scheme, and study the performance of the complete data link control. The embedded Markov chain and M/G/1 queue model are used to analyze the traffic in the channel. The derived analytical results are verified by numerical simulations.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115602160","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
Phrase based feature extraction for musical information retrieval 基于短语的音乐信息特征提取
1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368) Pub Date : 1999-08-22 DOI: 10.1109/PACRIM.1999.799559
Takashi Yanase, A. Takasu, J. Adachi
{"title":"Phrase based feature extraction for musical information retrieval","authors":"Takashi Yanase, A. Takasu, J. Adachi","doi":"10.1109/PACRIM.1999.799559","DOIUrl":"https://doi.org/10.1109/PACRIM.1999.799559","url":null,"abstract":"This paper presents a feature extraction method for musical information retrieval. The method presented uses a feature vector consisting of frequencies of local patterns represented with n-grams, which enables efficient search from large databases. In order to improve the performance of music retrieval, we extract features at the phrase level instead of whole melody, using an automatic phrase extraction method. The presented method is applied to a small database of Japanese popular songs and its effectiveness is shown experimentally.","PeriodicalId":176763,"journal":{"name":"1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132346009","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: 16
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