发布求助
文献互助 智能选刊 最新文献

Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing最新文献

筛选
英文 中文
An integrated Ku-band quasi-planar circuit mixer 一种集成ku波段准平面电路混频器
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48431
J. Bornemann
{"title":"An integrated Ku-band quasi-planar circuit mixer","authors":"J. Bornemann","doi":"10.1109/PACRIM.1989.48431","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48431","url":null,"abstract":"A Ku-band integrated circuit balanced mixer using commercially available beam-lead diodes is described. Etched from a 17.5- mu m-copper cladded RT-Duroid 5880 substrate with a thickness of 254 mu m, the planar circuit board is sandwiched between the two parts of a waveguide split-block housing. Since the manufacturing accuracy mainly depends on the low etching tolerances, the design is especially suitable for millimeter-wave applications. 8-dB conversion loss, a 5.6-dB DSB noise figure, and isolation values of 35 dB are obtained for the Ku-band prototype operating in the self-biasing mode.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117270364","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
An expert system for circuit board repair 电路板维修专家系统
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48351
N. Ling, M. E. Malowany, A. Malowany
{"title":"An expert system for circuit board repair","authors":"N. Ling, M. E. Malowany, A. Malowany","doi":"10.1109/PACRIM.1989.48351","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48351","url":null,"abstract":"Using a hierarchical approach, an expert system for performing circuit board repair tasks within a robotic workcell has been developed. The new circuit board repair system is rule-based and includes a nonmonotonic inference engine using forward chaining and nonblocking functions, a database describing a robotic workcell, and rule sets into which repair tasks are implemented. Parallel-processing capability is achieved by using nonblocking functions. Action synthesis is based on matching rules to the given database. The system was programmed in Common LISP on a SUN 3 workstation under UNIX BSD version 4.3 and on a dedicated Symbolics 3600 LISP machine. The development, implementation, and testing of the circuit board repair system are described.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127495888","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
Speech recognition strategy for stress-induced speech 应激诱导语音识别策略
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48401
J. W. Gordon, D. L. Sanford
{"title":"Speech recognition strategy for stress-induced speech","authors":"J. W. Gordon, D. L. Sanford","doi":"10.1109/PACRIM.1989.48401","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48401","url":null,"abstract":"The impact of style variations, and in particular stress-induced variations, on speech recognition performance is discussed. The approach is threefold. First, databases of stress-induced speech are used to measure the recognition performance of humans and commercial devices. Second, acoustic-phonetic analysis of the data is done to determine correlations between style variations and recognition performance; such a analysis helps to determine how changes in strategic design might better accommodate prosodic variations. Third, these hypotheses are tested using development recognition systems.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125040880","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 protocol software application generator 协议软件应用程序生成器
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48348
W. Hong
{"title":"A protocol software application generator","authors":"W. Hong","doi":"10.1109/PACRIM.1989.48348","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48348","url":null,"abstract":"An approach to generating protocol software from the validated protocol specifications is presented. Using this approach, the protocol application generator PAGE was developed. Using PAGE, an internet protocol was implemented as a set of automatically generated device driver routines and shown to run in a testbed simulating a real network environment. Protocol software thus generated is shown to serve as complete or nearly complete routines or as prototype routines for the protocol, depending upon the protocol software application generator and its application environment. The approach helps improve substantially the reliability of protocol software and the productivity of protocol software development.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126064155","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
Normalized 2-D ARMA lattice parameter modeling algorithm 归一化二维ARMA晶格参数建模算法
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48379
Hon Keung Kwan, Ying Chun
{"title":"Normalized 2-D ARMA lattice parameter modeling algorithm","authors":"Hon Keung Kwan, Ying Chun","doi":"10.1109/PACRIM.1989.48379","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48379","url":null,"abstract":"A Levinson-type algorithm is proposed for estimating the two-dimensional autoregressive-moving average (ARMA) model from the observed inputs and outputs of an unknown 2-D system. By applying the concept of dummy prediction errors, the algorithm can be extended for computing 2-D models of any AR-order and MA-order. It is shown that the algorithm can be greatly simplified when the input is a white process.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125566740","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
Coset code constructions of N-dimensional sphere packings from 1- and 2-dimensional lattices 基于一维和二维格的n维球面填料的协集码构造
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48370
F. Kschischang, S. Pasupathy
{"title":"Coset code constructions of N-dimensional sphere packings from 1- and 2-dimensional lattices","authors":"F. Kschischang, S. Pasupathy","doi":"10.1109/PACRIM.1989.48370","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48370","url":null,"abstract":"A technique for constructing N-dimensional sphere packings from certain one- and two-dimensional lattices is described. The packings are constructed as coset codes and take advantage of partitions of the base lattices that result in Hamming spaces. Known Hamming metric codes over GF(2), GF(3), GF(5), and GF(7) are used in the construction. The resulting packings are compared with the best known packings in each dimension. At low dimensions, many of these packings are the densest known; as the dimension increases, however, the packings become inferior to the best known ones.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115537033","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
Analysis and design of parallel algorithms and implementations of matrix multiplications for image and signal processing 分析和设计并行算法和实现矩阵乘法的图像和信号处理
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48302
M. Yasrebi, J. Browne
{"title":"Analysis and design of parallel algorithms and implementations of matrix multiplications for image and signal processing","authors":"M. Yasrebi, J. Browne","doi":"10.1109/PACRIM.1989.48302","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48302","url":null,"abstract":"Parallel matrix multiplication algorithms (based on the common data distribution formats) used in pattern recognition, image processing, and signal processing applications are discussed. A novel algorithm is introduced and is shown to be the fastest one for a determined class of applications. The algorithms are analyzed for performance as a function of array dimension, data distribution formats, and the architecture of the computer upon which the algorithms are executed. Performance bounds and speedups (linear in the number of processors) are established. The results of the analysis are given both as characterizations of executions on selected classes of architectures and also in the form of theorems which establish the relative performance of the algorithms across classes of data distributions and architectures.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116239985","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
Intermode tuning characteristics of an InGaAsP laser with optical feedback from an external grating reflector 外光栅反射器光反馈InGaAsP激光器的模间调谐特性
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48297
J. Binder, G. Cormack, A. Somani
{"title":"Intermode tuning characteristics of an InGaAsP laser with optical feedback from an external grating reflector","authors":"J. Binder, G. Cormack, A. Somani","doi":"10.1109/PACRIM.1989.48297","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48297","url":null,"abstract":"The spectral characteristics are reported of one-side antireflection coated 1.3 mu m InGaAsP lasers exposed to strong feedback from an external grating, when the center wavelength of reflection of the grating is tuned continuously from one solitary laser diode longitudinal mode to the adjacent lower frequency mode. The effects of different residual reflectivities of the coated facet on the tuning characteristics of the laser between internal cavity modes are shown to agree with theory. Bistability in the tuning characteristic is explained. A dependence of the stability of single-mode oscillation and of the linewidth on the detuning from the solitary laser modes is theoretically explained.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129935956","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
Performance of a 45 Mb/s optical DFSK system using self-heterodyne detection 采用自外差检测的45 Mb/s光DFSK系统性能
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48298
S. Lohtia, P. Goud, C. G. Englefield
{"title":"Performance of a 45 Mb/s optical DFSK system using self-heterodyne detection","authors":"S. Lohtia, P. Goud, C. G. Englefield","doi":"10.1109/PACRIM.1989.48298","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48298","url":null,"abstract":"An optical differential frequency shift keying (DFSK) system with self-heterodyne detection (SHD) operating at 45 Mb/s is demonstrated. One of the major advantages of the DFSK system is that it does not require an optical local oscillator (laser diode) at the receiver. This reduces the complexity of the receiver design and lowers the system cost. It is shown that the system can tolerate a source linewidth-to-bitrate ratio of 0.5. The bit error rate (BER) is obtained as a function of received average DC optical power for different transmitted sequences, and the effect of long strings of zeros and ones in the data stream on receiver performance is analyzed. The effect of laser phase noise (linewidth) on broadening of the intermediate frequency (IF) spectrum is investigated by determining the BER characteristics for two IF filters with 3-dB bandwidths of 300 MHz and 500 MHz. For a 101010 . . . data sequence, a BER of less than 10/sup -9/ is obtained.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128392838","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
Robust vector quantization based on spectral mapping with a noise estimate 基于谱映射和噪声估计的鲁棒矢量量化
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48341
Xiangyang Chen, Vludimir Cuperman
{"title":"Robust vector quantization based on spectral mapping with a noise estimate","authors":"Xiangyang Chen, Vludimir Cuperman","doi":"10.1109/PACRIM.1989.48341","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48341","url":null,"abstract":"The problem of optimal quantization of a signal affected by additive noise in the general framework of vector quantization is studied. A noise estimator is used to adapt the vector quantization codebook to the specific noisy environment. Two adaptation strategies are discussed: switched adaptation (multicodebook) and an adaptation approach in which the codebook is computed from the optimal clean signals codebook and the noise estimate. Experimental results show a significant improvement over the direct vector quantization of the noisy signal.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126914333","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信