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检索条件"主题词=Modulation coding"
7025 条 记 录,以下是4771-4780 订阅
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A novel two-stage lossless image compression scheme
A novel two-stage lossless image compression scheme
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Asia-Pacific Conference on Communications
作者: Yu-Chen Hu Chin-Chen Chang Department of Computer Science and Information Engineering National Chung Cheng University Chiayi Taiwan
A novel two-stage image compression scheme is proposed. In the first stage, differential pulse code modulation (DPCM) is used to decorrelate the raw image data. Next, an effective scheme based on the Huffman coding sc... 详细信息
来源: 评论
Performance and capacity evaluations of DECT, PACS, and PHS standards for wireless local loop applications
Performance and capacity evaluations of DECT, PACS, and PHS ...
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IEEE Conference on Vehicular Technology (VTC)
作者: O. Momtahan H. Hashemi Department of Electrical Engineering Sharif University of Technology Tehran Iran
In this paper performance and capacity of the three standards for wireless local loop (WLL) applications have been investigated, both qualitatively and quantitatively. The qualitative evaluation consists of detailed c... 详细信息
来源: 评论
Lossless image compression using modular differential pulse code modulation
Lossless image compression using modular differential pulse ...
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IEEE International Conference on Image Processing
作者: S.A. Rizvi N.M. Nasrabadi Department of Engineering Science and Physics College of Staten Island City University of New York Staten Island NY USA AMSRL-SE-SE U.S. Army Research Laboratory Adelphi MD USA
This paper presents a new lossless image compression technique called modular differential pulse code modulation (MDPCM). The proposed technique consists of a VQ classifier and several neural network class predictors.... 详细信息
来源: 评论
Modulated coded zero-forcing decision feedback equalizer
Modulated coded zero-forcing decision feedback equalizer
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MILCOM, Military Communications Conference
作者: Xiang-Gen Xia Department of Electrical and Computer Engineering University of Delaware Newark DE USA
Modulated codes (MC) are error correction codes (ECC) over the real/complex field, which are used for mitigating the intersymbol interference (ISI). The arithmetic operations of the MC encoder are the same as the ones... 详细信息
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A low-power and low-noise CMOS prescaler for 900 MHz to 1.9 GHz wireless applications
A low-power and low-noise CMOS prescaler for 900 MHz to 1.9 ...
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Custom Integrated Circuits Conference (CICC)
作者: W.-H. Chang D.R. Pehlke R. Yu Rockwell International Science Center Thousand Oaks CA USA
A high-speed dual-modulus prescaler has been developed in 0.36 /spl mu/m CMOS. The prescaler was designed for low-power frequency synthesizers for 900 MHz to 1.9 GHz wireless applications. It provides programmable div... 详细信息
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A fast-acquisition demodulation scheme for 2.4 GHz wireless DSSS transceiver VLSI
A fast-acquisition demodulation scheme for 2.4 GHz wireless ...
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International Symposium on VLSI Technology, Systems and Applications
作者: Hua-Chin Lee Chin-Kae Tzou Chorng-Kuang Wang Viggen Dan Department of Electrical Engineering Chungli Taiwan Hsinchu Taiwan Department of Electrical Engineering Taipei Taiwan Wireless Communication Department Communication Technology Division Computers Communications Laboratory ITRI Hsinchu Taiwan
In this paper, a CMOS cell based system VLSI design for Direct-Sequence Spread-Spectrum (DSSS) wireless LAN transceiver is presented. In addition, an efficient and fast-acquisition demodulation scheme is proposed to u... 详细信息
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Performance analysis of wideband CDMA system with coherent demodulation in reverse link
Performance analysis of wideband CDMA system with coherent d...
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IEEE Region 10 International Conference TENCON
作者: Jiang Nanyan Wang Wenbo Yang Dacheng Beijing University of Posts and Telecommunications Beijing China
In this paper, coherent demodulation models, corresponding to two modulation schemes, including pilot channel and pilot symbol assisted in the reverse link of wideband CDMA, are given. Analysis and comparison of the a... 详细信息
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New approach in comparing different trellis coded modulation in land mobile radio systems
New approach in comparing different trellis coded modulation...
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International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)
作者: M. Pejanovic Z. Veljovic Faculty of Electrical Engineering University of Montenegro Podgorica Yugoslavia
Effects of different trellis coded modulation (TCM) methods on land mobile radio systems performance improvement are analyzed. Two commonly used techniques are chosen: TCM 8-PSK and TCM 16-QAM. For the sake of compari... 详细信息
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Implementation of modulated lapped transform using programmable logic
Implementation of modulated lapped transform using programma...
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IEEE International Conference on Consumer Electronics (ICCE)
作者: C. Jing H.-M. Tai Department of Electrical Engineering University of Tulsa Tulsa OK USA
This paper presents a hardware implementation of the modulated lapped transform (MLT) which is commonly used in audio and video compression applications. The MLT is formulated into the form that takes advantage of the... 详细信息
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Trellis coded color quantization of images
Trellis coded color quantization of images
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IEEE International Conference on Image Processing
作者: S.S. Cheng Zixiang Xiong Jian Qiao Huang Department of Electrical Engineering University of Hawai Honolulu HI USA
We examine color quantization of images using trellis coded quantization (TCQ). Together with a simple dithering scheme, an 8-bit trellis coded color quantizer reproduces images that are visually indistinguishable fro... 详细信息
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