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Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers最新文献

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Beamforming for efficient interference suppression in a mobile communication environment 在移动通信环境中有效抑制干扰的波束形成
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540805
Won Cheol Lee, S. Pillai
{"title":"Beamforming for efficient interference suppression in a mobile communication environment","authors":"Won Cheol Lee, S. Pillai","doi":"10.1109/ACSSC.1995.540805","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540805","url":null,"abstract":"An important problem in a multi-user mobile communication scenario is to provide adequate suppression of interfering signals at each receiver. This can be effectively achieved in two steps by using a multi-sensor array at the transmitter and the receiver. First, the array at the transmitter is used to form a main beam along the desired receiver direction under the constraint that the total transmitted power along the undesired receiver directions is minimized. Because of the large number of receivers present in the scene, exact null placement will not be possible. However, each receiver also forms a beam under similar constraints, and the combined effect of these beams are shown to result in adequate interference suppression. The desired weight vectors in each case depend on a set of intermediate parameters that can be determined as the least square solution of an over determined system of equations.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125982299","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
PRI analysis from sparse data via a modified Euclidean algorithm 通过改进的欧几里得算法对稀疏数据进行PRI分析
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540879
B. Sadler, S. Casey
{"title":"PRI analysis from sparse data via a modified Euclidean algorithm","authors":"B. Sadler, S. Casey","doi":"10.1109/ACSSC.1995.540879","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540879","url":null,"abstract":"Analysis of periodic pulse trains based on time of arrival is considered, with perhaps very many missing observations and contaminated data. A period estimator is developed based on a modified Euclidean algorithm. This algorithm is a computationally simple, robust method for estimating the greatest common divisor of a noisy contaminated data set. The resulting estimate, while not maximum likelihood, is used as initialisation in a three-step algorithm that achieves the Cramer-Rao bound for moderate noise levels, as shown by comparing Monte Carlo results with the Cramer-Rao bounds.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125094688","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: 5
Block adaptive filtering with application to real-time broadband RF spectral whitening 块自适应滤波在实时宽带射频频谱白化中的应用
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540627
M. Bredemann, G. Elliott
{"title":"Block adaptive filtering with application to real-time broadband RF spectral whitening","authors":"M. Bredemann, G. Elliott","doi":"10.1109/ACSSC.1995.540627","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540627","url":null,"abstract":"The frequency content of signals, which can be adaptively processed in real time, have typically been limited by A/D conversion rates and digital signal processor instruction speeds. By sampling averages rather than instantaneous values of signals formed from the predictor configuration, A/D sample rates and computational requirements can be significantly reduced. This paper describes a circuit which adaptively attenuates 90 MHz bandwidth signals with a 25 kHz sample rate using an analog programmable transversal filter (PTF). The dynamic range of the overall circuit exceeds that of the individual PTF.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121463320","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
Optimum wordlength determination of 8/spl times/8 IDCT architectures conforming to the IEEE standard specifications 符合IEEE标准规范的8/spl倍/8 IDCT体系结构的最佳字长确定
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540815
Seehyun Kim, Wonyong Sung
{"title":"Optimum wordlength determination of 8/spl times/8 IDCT architectures conforming to the IEEE standard specifications","authors":"Seehyun Kim, Wonyong Sung","doi":"10.1109/ACSSC.1995.540815","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540815","url":null,"abstract":"Optimum wordlengths for implementing an 8/spl times/8 IDCT (inverse discrete cosine transform) algorithm have been determined for minimizing the hardware implementation cost while satisfying the IEEE standard specifications. Three different implementation architectures, which are based on the multiplier-adder, distributed arithmetic, and scaled distributed arithmetic, are used for the optimization. The fixed-point optimization utility that automatically generates the fixed-point simulation model of a floating-point C program has been used. The optimization results show that the internal wordlength can be reduced substantially when compared with the previously known IDCT implementations.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129181824","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
Enhanced classification performance from multiband infrared imagery 增强多波段红外图像的分类性能
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540818
L. Hoff, A. Chen, X. Yu, E. M. Winter
{"title":"Enhanced classification performance from multiband infrared imagery","authors":"L. Hoff, A. Chen, X. Yu, E. M. Winter","doi":"10.1109/ACSSC.1995.540818","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540818","url":null,"abstract":"Target classification using infrared data can be enhanced by using multiple spectral bands rather than a single band. Previously, algorithms have been developed and shown to provide detection enhancement with multiple bands. However, not all the bands produced by a hyperspectral infrared sensor are useful. This paper presents measures of performance that are useful for determining which bands to use and how many bands may be required to achieve reliable classification. These performance measures are applied to data collected by the spatially modulated inverse Fourier transform spectrometer (SMIFTS) hyperspectral infrared sensor to illustrate the advantages of increasing the number of spectral bands.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127376423","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: 8
On the classification of moving objects in image sequences using 3D adaptive recursive tracking filters and neural networks 利用三维自适应递归跟踪滤波器和神经网络对图像序列中的运动目标进行分类
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540851
L. Bruton, N. Bartley, Z.Q. Liu
{"title":"On the classification of moving objects in image sequences using 3D adaptive recursive tracking filters and neural networks","authors":"L. Bruton, N. Bartley, Z.Q. Liu","doi":"10.1109/ACSSC.1995.540851","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540851","url":null,"abstract":"It is shown that 3D recursive filters may be used to classify the motion of objects in discrete-time spatiotemporal 3D image sequences. The 3D filter has a time-varying 3D frequency-planar passband that is adapted in a feedback system to automatically track a moving object on the basis of its smoothly changing trajectory, thereby rejecting noise and stopband objects that are not of interest. The adaptive spacetime velocity vector of the passband object is available within this feedback system and is used as the input to a multi-layer perceptron neural network which classifies the motion of the passband object according to a number of motion characteristics, such as its direction of travel, velocity, acceleration as a function of time and position and its stopping time. It is shown that such a system may be used to classify the motion of vehicles at an intersection of roads.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"145 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133586530","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: 7
Synthesizing self-testable filters via scaling and redundant operator elimination 通过缩放和冗余算子消去合成自测试滤波器
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540527
L. Goodby, A. Orailoglu
{"title":"Synthesizing self-testable filters via scaling and redundant operator elimination","authors":"L. Goodby, A. Orailoglu","doi":"10.1109/ACSSC.1995.540527","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540527","url":null,"abstract":"A synthesis-based approach to improving the testability of digital filters is presented, with the aim of producing designs that achieve very high fault coverage under low-overhead built-in self-test methodologies. The synthesis-based approach permits high coverages to be achieved without the addition of special test hardware or other manipulation of the gate-level netlist. The testability of a design is enhanced at the register-transfer level (RTL), prior to synthesis. Using scaling as a redundancy elimination technique, it is possible to reduce the area required by a design, as well as identify further redundancies that can be eliminated through the automatic selection of optimized RTL structures drawn from a parameterized VHDL library.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134016247","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
Blind asynchronous near-far resistant FIR receivers for CDMA communication 用于CDMA通信的盲异步近抗远FIR接收机
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540534
L. Tong
{"title":"Blind asynchronous near-far resistant FIR receivers for CDMA communication","authors":"L. Tong","doi":"10.1109/ACSSC.1995.540534","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540534","url":null,"abstract":"A canonical structure of near-far resistant FIR receivers for asynchronous CDMA over ISI channels is proposed. The receiver structure includes a minimum-order FIR decorrelator and a bank of equalizers designed for each user. An equivalence between the decorrelator and the so-called statistical decorrelator is established, which leads to a blind near-far resistant FIR receivers based on decorrelating (second-order or higher-order) statistics.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133323153","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
Computational aspects of telemedicine 远程医疗的计算方面
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540595
R. Sridhar, V. De Brunner
{"title":"Computational aspects of telemedicine","authors":"R. Sridhar, V. De Brunner","doi":"10.1109/ACSSC.1995.540595","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540595","url":null,"abstract":"Telemedicine systems are a facility which allow geographically distributed health care personnel to communicate so as to diagnose and derive treatment methods. Major computational issues relating to telemedicine are compression algorithms, establishment and maintenance of network connections, and image storage and retrieval.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"89 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128827855","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
Examining the effects of room response in oversampled, subband acoustic echo cancelers 检查过采样子带声回声消除器中房间响应的影响
Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers Pub Date : 1995-10-30 DOI: 10.1109/ACSSC.1995.540592
P. de Leon, D. Etter
{"title":"Examining the effects of room response in oversampled, subband acoustic echo cancelers","authors":"P. de Leon, D. Etter","doi":"10.1109/ACSSC.1995.540592","DOIUrl":"https://doi.org/10.1109/ACSSC.1995.540592","url":null,"abstract":"We examine the effects of the room response on the convergence of oversampled, subband acoustic echo cancelers. Specifically, we have observed that spectral features of the room response such as peaks or nulls have definite and measurable effects an the convergence of the subband MSE which in turn has an effect on the reconstructed MSE. These effects can be traced back to slow converging spectral components located at the analysis filter band edge.","PeriodicalId":171264,"journal":{"name":"Conference Record of The Twenty-Ninth Asilomar Conference on Signals, Systems and Computers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128456466","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
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