Description: trellis coded quantizaiton 的基本范例，与JPEG2000图像压缩基础那本书提供的例子相符，这里给出仿真了那个例子的代码。-trellis coded quantizaiton the basic paradigm, and JPEG2000 image compression based on the book to provide examples of line, where the simulation examples of that code. Platform: |
Size: 1024 |
Author:林春雨 |
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Description: 一个详细的MIMO编程，包含各种衰落模型，运用空时网格码实现。-MIMO a detailed program includes a variety of fading model, the use of space-time trellis code to achieve. Platform: |
Size: 27648 |
Author:夏长松 |
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Description: 有一个基本的格子结构必须提供的Viterbi译码算法。因此，有两个步骤需要在一个特定组合的格子和调制的仿真：第一就是棚架结构。-
Trellis structure，TCM schemes have an underlying trellis structure that must be provided to the Viterbi decoding algorithm. Therefore, there are two steps required in the simulation of a particular combination of trellis and modulation Platform: |
Size: 1024 |
Author:karen |
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Description: Space-time codes and MIMO systems(book＋source)
space-time trellis codes-matlab simulation
Space Time Processing for MIMO Communications - Wiley
MIMO Channels and Space-Time Coding（Course）-Space-time codes and MIMO systems(book＋source)
space-time trellis codes-matlab simulation
Space Time Processing for MIMO Communications- Wiley
MIMO Channels and Space-Time Coding（Course） Platform: |
Size: 14995456 |
Author:周州 |
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Description: 在这项工作中，我们对待这个问题的恢复正确的消息，如果额外的位（假报警）已加入的消息体中，在随机的位置。这的情况是常见的一些是与选择性嵌入水印系统
典型的当人类视觉系统（或录音）注册成立，以提高质量水印系统。我们提出一个有效的解码方案
使用一些修改的“维特比算法的代码。添加额外的状态表示可能的误报率和一个新的扩展算法的改进网格提出图。仿真结果表明，我们的算法在高效率的检测随机的误报率很高。-In this work, we treat the problem of recovering the correct message if
extra bits (false alarms) are added to the body of the message at random locations. This
situation is common for some watermarking systems with selective embedding which is
typical when the human visual (or audio) system is incorporated to enhance the quality of
the watermarking system. We propose an efficient decoding scheme for convolutional
codes using some modifications of‘ the Viterbi algorithm. Extra states are added to
represent the possible false alarms and a new expansion algorithm of the modified trellis
diagram is proposed. The simulation results show the high efficiency of our algorithm in
detecting random false alarms with high rates. Platform: |
Size: 382976 |
Author:白合 |
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Description: 多输人多输出(MIMO)技术是第三代和未来移动通信与个人通信系统实现高数据速率，提高传输质量
的重要途径[1 ]。目前MIMO系统中使用的发射方案主要包括：①贝尔分层空时结构BI STA(Bell Layered
Space Time Architecture)[。 ；②正交空时分组码OSTBC(Orthogonal Space Time Block Coding) ；⑧空时
格型编码STTC(Space Time Trellis Coding) 。-Motivated by the need for high throughput sphere decoding formultipleinput-
multiple-output (MIMO) communication systems, we propose
a parallel depth-first sphere decoding (PDSD) algorithm that provides
the advantages of both parallel processing and rapid search
space reduction. The PDSD algorithm is designed for efficient implementation
on programmable multi-processor platforms. We investigate
the trade-off between the throughput and computation overhead
when the number of processing elements is 2, 4 and 8, for a 4×
4 16-QAM system across a wide range of SNR conditions. Through
simulation, we show that PDSD can offer significant throughput improvement
without incurring substantial computation overhead by
selecting the appropriate number of processing elements according
to specific SNR conditions. Platform: |
Size: 2048 |
Author:田航 |
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Description: 采用卷积编码与维特比译码对通信过程进行了仿真，展示了卷积码的差错校正容量，调制方式采用QPSK-This demo shows how to use a convolutional encoder and decoder in a
simulation of a communications link. It also shows the error correcting capability of convolutional codes. This demonstrates the convolutional
trellis generator, POLY2TRELLIS, encoder, CONVENC, and decoder, VITDEC.
It also demonstrates the use of other functions (e.g. INTDUMP, RECTPULSE,
BITERR, BERCODING, RANDSRC, and AWGN) and objects (MODEM.PSKMOD and
MODEM.PSKDEMOD). Many of these functions are described in greater detail
in the "Phase Shift Keying Simulation" demo. Finally, this demo displays
empirical performance curves for QPSK with Gray coding using data
generated by the example, VITSIMEXAMPLE. Platform: |
Size: 3072 |
Author:马健 |
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Search - trellis simulation