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检索条件"主题词=Modulation coding"
7022 条 记 录,以下是1241-1250 订阅
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Bandwidth-Efficient modulation Codes Based on Nonbinary Irregular Repeat Accumulate Codes
Bandwidth-Efficient Modulation Codes Based on Nonbinary Irre...
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IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference
作者: Mao-Ching Chiu Department of Communications Engineering National Chung Cheng University Chiayi Taiwan
Due to the random nature of LDPC codes, most of the good LDPC codes found in the literature do not possess a simple encoding structure. Thus, the encoding complexity of those LDPC codes can be as high as O ( N 2 ), w... 详细信息
来源: 评论
Achievable Rates for Adaptive IR Hybrid ARQ
Achievable Rates for Adaptive IR Hybrid ARQ
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IEEE Princeton Section Sarnoff Symposium
作者: Nandu Gopalakrishnan Saul Gelfand School of Electrical and Computer Engineering Purdue University West Lafayette IN USA Forward Looking Department Alcatel-Lucent Inc. Whippany NJ USA
This paper generalizes the information theoretic achievable rate analysis of time (slot length) adaptive and non- adaptive incremental redundancy (IR) hybrid ARQ (HARQ) of earlier works to bandwidth (fixed slot length... 详细信息
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Space-Time Pre-Filtering Based Soft-Input Soft-Output Detectors in Frequency-Selective MIMO Channels
Space-Time Pre-Filtering Based Soft-Input Soft-Output Detect...
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IEEE Conference on Vehicular Technology (VTC)
作者: Wenjin Wang Bin Jiang Xiqi Gao Xiaohu You National Mobile Communication Research Laboratory South-East University Nanjing China
This paper investigates low-complexity soft-input soft-output (SISO) detectors for multiple-input multiple-output (MIMO) transmission over frequency-selective channels. The detectors are developed with a unified detec... 详细信息
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Performance Analysis of Adaptive Bit Loading for SFBC-OFDM over WSSUS Multipath Channels
Performance Analysis of Adaptive Bit Loading for SFBC-OFDM o...
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International Symposium on Antennas, Propagation and EM Theory (ISAPE)
作者: Wei-gong Wang Xin-yu Da The Telecommunication Engineering Institute Air Force Engineering University Xi'an China
This paper studies an adaptive modulation technique combined with space-frequency block coded OFDM (SFBC-OFDM) over wide sense stationary uncorrelated scattering (WSSUS) multipath channels. Chowpsilas adaptive bit loa... 详细信息
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On the Channel Capacity and Iterative Demapping of Generalized 4PAM over AWGN Channel
On the Channel Capacity and Iterative Demapping of Generaliz...
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The 11th IEEE International Conference on Communications Systems(第11届电子和电气工程师协会国际通信系统会议)(IEEE ICCS 2008)
作者: Qiuliang Xie Jian Song Kewu Peng Zhixing Yang Tsinghua National Laboratory for Information Science and Technology (TNList)Department of Electronic Tsinghua National Laboratory for Information Science and Technology (TNList) Department of Electroni
The concept of generalized 4PAM (G4PAM) is introduced in this paper, where each 4PAM symbol includes one high bit and one low bit with non-uniformly spaced constellation. The channel capacity of G4PAM constrained addi... 详细信息
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Minimization of Transceiver Energy Consumption in Wireless Sensor Networks with AWGN Channels
Minimization of Transceiver Energy Consumption in Wireless S...
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Annual Allerton Conference on Communication, Control, and Computing
作者: Tianqi Wang Wendi Heinzelman Alireza Seyedi
In this paper, we determine how to minimize energy consumption per information bit in a single link, with the consideration of packet retransmission and overhead. This is achieved by deriving expressions for the optim... 详细信息
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Convergence Analysis of Iteratively Detected Time Hopping and DS-CDMA Ultrawide Bandwidth Systems by EXIT Charts
Convergence Analysis of Iteratively Detected Time Hopping an...
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IEEE Conference on Vehicular Technology (VTC)
作者: Raja Ali Riaz Muhammad El-Hajjar Qasim Zeeshan Ahmed Soon Xin Ng Sheng Chen Lajos Hanzo School of ECS University of Southampton UK UK
This paper presents a novel analysis on the decoding convergence of Time Hopping (TH) and Direct Sequence (DS) Code-Division Multiple-Access (CDMA) Ultrawide Bandwidth (UWB) systems when communicating over multipath N... 详细信息
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Unambiguous tracking techniques for Galileo BOC(1,1) signals
Unambiguous tracking techniques for Galileo BOC(1,1) signals
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IEEE Asia-Pacific Conference on Circuits and Systems
作者: Fan Xiangning Huang Shuancheng Institute of RF-&-OE-ICs School of Information Science and Engineering South-East University Nanjing China National Mobile Communications Research Laboratory South-East University Nanjing China
Because of the multi-peak auto-correlation function, false locking may happen in Galileo BOC code tracking process. Firstly, the shortcoming of the classic early-late-gate tracking loop for BOC code tacking is discuss... 详细信息
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Multi-User OFDM System Performance Subject to Control Channel Reliability in a Multi-Cell Environment
Multi-User OFDM System Performance Subject to Control Channe...
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IEEE International Conference on Communications (ICC)
作者: M. Bohge A. Wolisz A. Furuskar M. Lundevall Telecommunication Networks Group Technical University Berlin Berlin Germany Wireless Access Networks Ericsson Research Limited Kista Sweden
Dynamic mechanisms such as adaptive modulation and coding or scheduling have been shown to significantly improve the performance of cellular systems. This gain comes at the cost of additional signaling overhead that n... 详细信息
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A microelectromechanically tunable asymmetric Fabry-Perot quantum well modulator at 1.55 μm
A microelectromechanically tunable asymmetric Fabry-Perot qu...
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Conference on Lasers and Electro-Optics (CLEO)
作者: T. H. Stievater W. S. Rabinovich M. W. Pruessner D. Park S. Kanakaraju C. J. K. Richardson Naval Research Laboratory Inc. Washington D.C. DC USA Laboratory of Physical Science MD USA
We experimentally demonstrate an InP-based microelectromechanically tunable asymmetric Fabry-Perot quantum well modulator that operates in the optical C-band. The device exhibits contrast ratios over 20 (13 dB) with l... 详细信息
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