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检索条件"主题词=adaptive coding"
562 条 记 录,以下是441-450 订阅
排序:
Weighted universal image compression
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IEEE TRANSACTIONS ON IMAGE PROCESSING 1999年 第10期8卷 1317-1329页
作者: Effros, M Chou, PA Gray, RM CALTECH Dept Elect Engn Pasadena CA 91125 USA Microsoft Corp Redmond WA 98052 USA Stanford Univ Dept Elect Engn Informat Syst Lab Stanford CA 94305 USA
We describe a general, coding strategy leading to a family of universal image compression systems designed to give good performance in applications where the statistics of the source to be compressed are not available... 详细信息
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Dynamic bit rate assignment in wireless CDMA data transmissions
Dynamic bit rate assignment in wireless CDMA data transmissi...
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IEEE Conference on Vehicular Technology (VTC)
作者: A. Abrardo G. Benelli G. Giambene D. Sennati Dipartimento di Ingegneria delľInformazione Università degli Studi di Siena Siena Italy
This paper compares different schemes that can be used to improve the performance of CDMA in wireless data systems. In particular, we consider a closed-loop power control scheme and an adaptive coding scheme. The comp... 详细信息
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A flexible Reed-Solomon codec
A flexible Reed-Solomon codec
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AFRICON Conference
作者: A. du Preez F. Swarts F. Agdhasi Department of Electrical Engineering University of the Witwatersrand South Africa
We report on the implementation of a flexible Reed-Solomon codec using a field programmable gate array (FPGA) for use in a mobile communication system employing adaptive coding. The number of correctable errors can be... 详细信息
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On the improvement of low elevation angle satellite communications impaired by tropospheric fading effects
On the improvement of low elevation angle satellite communic...
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MILCOM, Military Communications Conference
作者: J.C. Kim D.E. Schall System and Information Technology Group TRW Inc. Fairfax VA USA
Performance impairments occur on C- and Ku-band satellite communications links because of severe tropospheric fading effects when the elevation angle of the ground station is very low (<50). Two cases of satellite ... 详细信息
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adaptive code allocation in multicode-CDMA for transmitting H.263 video
Adaptive code allocation in multicode-CDMA for transmitting ...
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IEEE Conference on Wireless Communications and Networking
作者: B. Deep Wu-Chi Feng Computer & Information Science Ohio State Uinversity Columbus OH USA Ohio State University Columbus OH US
This paper proposes a new way to incorporate H.263 video into existing voice/data code-division multiple access (CDMA) networks using a multi-code access protocol. A channel allocation policy is proposed that "sh... 详细信息
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adaptive error control for hybrid (satellite-terrestrial) networks
Adaptive error control for hybrid (satellite-terrestrial) ne...
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IEEE Conference on Wireless Communications and Networking
作者: S. Cho Broadband and Wireless Networking Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA
Hybrid satellite-terrestrial networks are becoming increasingly popular for asymmetric multimedia services such as file transfer and database services. This paper presents an adaptive error control (AEC) protocol for ... 详细信息
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Lexical attraction for text compression
Lexical attraction for text compression
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Data Compression Conference (DCC)
作者: J. Bach I.H. Witten Computer Science Departments Humboldt University of Berlin Germany Waikato University New Zealand
[Summary form only given]. The best methods of text compression work by conditioning each symbol's probability on its predecessors. Prior symbols establish a context that governs the probability distribution for t... 详细信息
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adaptive code acquisition using a GO-CFAR processor in DS/CDMA systems
Adaptive code acquisition using a GO-CFAR processor in DS/CD...
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IEEE Region 10 International Conference TENCON
作者: Hong Gil Kim Iickho Song Sun Yong Kim Jung Hoon Lee Suk Chan Kim Department of Electrical Engineering Korea Advanced Institute of Science and Technology Daejeon South Korea Department of Electronics Engineering Hallym University Chuncheon Kangwon South Korea
We propose to use a greatest of (GO) CFAR processor for PN code acquisition in DS/CDMA systems. We compare the single-dwell scheme without the verification mode using the GO CFAR processor with that using the cell ave... 详细信息
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A hybrid compression method based on region separation for synthetic and natural compound images
A hybrid compression method based on region separation for s...
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IEEE International Conference on Image Processing
作者: T. Mogi Hypermedia Research Center Sanyo Electric Company Limited Japan
This paper presents a hybrid compression method for a compound image including characters, graphics, and photos. Such kind of image is popular as Web contents or TV game images. We use usually JPEG to compress it, but... 详细信息
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Spatio-temporal coding for wireless communication
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IEEE TRANSACTIONS ON COMMUNICATIONS 1998年 第3期46卷 357-366页
作者: Raleigh, GG Cioffi, JM Clar Wireless Inc Belmont CA 94002 USA Stanford Univ Dept Elect Engn Stanford CA 94305 USA Amati Commun Corp San Jose CA 95124 USA
Multipath signal propagation has long been viewed as an impairment to reliable communication in wireless channels, This paper shows that the presence of multipath greatly improves achievable data rate if the appropria... 详细信息
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