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Description: 硕士学位论文:LDPC码在瑞利衰落信道中的性能分析
信道编码技术可以带来编码增益，节省宝贵的功率资源，己经成为现代数字
通信系统中必不可少的关键技术。LDPC码采用低复杂度的迭代译码算法，且具有
逼近香农限的性能.由于LDPC码具有诸多优点，它在信息可靠传输中的良好应
用前景己经引起学术界和rr业界的高度重视，成为当今信道编码领域最受瞩目的
研究热点之一。
本文主要探讨了LDPC码在瑞利衰落信道中的性能，基于LDPC码的分组空
时码系统，以及基于LDPC码的正交频分复用系统.-master's degree thesis : LDPC codes in Rayleigh fading channels Performance Analysis channel coding technology can bring coding gain, Power saving valuable resources have become modern digital communication systems essential to the critical technologies. LDPC low complexity of the iterative decoding algorithm, having approximation Shannon limit performance. Because LDPC has many advantages, It reliable transmission of information in the application of good prospects has been caused rr academia and industry are taking, become the channel coding areas of the most watched one of the hot spots. This paper mainly discusses the LDPC Rayleigh fading channels in the performance Based on LDPC a space-time coding system, and based on LDPC orthogonal frequency division multiplexing system.
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Author: daniel |
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Description: 香农第一定理指出了平均码长与信源之间的关系，同时也指出了可以通过编码使平均码长达到极限值，这是一个很重要的极限定理。-Shannon first theorem that the average yards long with the letter of the relationship between the source, it has also pointed out the code can make the average yards long reach limits, this is a very important Limit Theorem.
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Author: lijie |
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Description: 硕士学位论文:LDPC码在瑞利衰落信道中的性能分析
信道编码技术可以带来编码增益，节省宝贵的功率资源，己经成为现代数字
通信系统中必不可少的关键技术。LDPC码采用低复杂度的迭代译码算法，且具有
逼近香农限的性能.由于LDPC码具有诸多优点，它在信息可靠传输中的良好应
用前景己经引起学术界和rr业界的高度重视，成为当今信道编码领域最受瞩目的
研究热点之一。
本文主要探讨了LDPC码在瑞利衰落信道中的性能，基于LDPC码的分组空
时码系统，以及基于LDPC码的正交频分复用系统.-master's degree thesis : LDPC codes in Rayleigh fading channels Performance Analysis channel coding technology can bring coding gain, Power saving valuable resources have become modern digital communication systems essential to the critical technologies. LDPC low complexity of the iterative decoding algorithm, having approximation Shannon limit performance. Because LDPC has many advantages, It reliable transmission of information in the application of good prospects has been caused rr academia and industry are taking, become the channel coding areas of the most watched one of the hot spots. This paper mainly discusses the LDPC Rayleigh fading channels in the performance Based on LDPC a space-time coding system, and based on LDPC orthogonal frequency division multiplexing system.
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Author: daniel |
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Description: 1993 年两位法国教授Berrou、Glavieux 和他们的缅甸籍博士生Thitimajshima 在ICC 会议上发表的Near Shannon limit error-correcting coding and decoding: Turbo codes”，-1993 France 2 Professor Berrou, Glavieux and their Burmese Doctor ICC meeting in Thitimajshima published Near Shannon limit error-correcting coding and decoding: Turbo codes
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Author: 王建毅 |
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Description: 在3G通讯中，turbo码以其优异的性能几乎达到了香浓定理的极限。我们提供一种低功耗的turbo码译码算法-In the 3G communications, turbo codes for its excellent performance almost reached the limit of Shannon theorem. We provide a low-power turbo code decoding algorithm
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Author: wulinbo |
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Description: LDPC码在基于BP (Belief Propagation) 的迭代译码相结合的条件下具有逼近Shannon 限的性能，是继turbo 码后在纠错编码领域又一重大进展。压缩文件中给出了LDPC在高斯信道下的c程序。-LDPC codes based on BP (Belief Propagation) Iterative Decoding of combining conditions with performance approaching Shannon limit on the heels of turbo code error correction coding in another area of significant progress. Compressed file give the LDPC at Gaussian channel c under the procedure.
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Author: aiguixia |
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Description: 典型的Turb。码是一类并行级联的系统卷积码，当交织长度足够长时，其性能可逼
近仙农限。-Typical Turb. Code is a class of parallel concatenated convolutional codes of the system, when the cutting length for long enough, its performance can be close to Shannon limit.
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Author: 123 |
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Description: Near Shannon limit error-correcting coding and decoding：Turbo-codes
turbo码的原理 -Near Shannon limit error-correcting coding and decoding: Turbo-codes turbo code principle
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Size: 549888 |
Author: justin |
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Description: bandwidth efficiency of shannon limit
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Size: 4096 |
Author: mado24 |
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Description: serval books about ldpc , which is latest code near shannon limit , has great importance in digital communication
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Author: 梅国强 |
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Description: The Shannon entropy is a measure of the average information content one is missing when one does not know the value of the random variable. The concept was introduced by Claude E. Shannon in his 1948 paper "A Mathematical Theory of Communication".
Shannon s entropy represents an absolute limit on the best possible lossless compression of any communication, under certain constraints: treating messages to be encoded as a sequence of independent and identically-distributed random variables, Shannon s source coding theorem shows that, in the limit, the average length of the shortest possible representation to encode the messages in a given alphabet is their entropy divided by the logarithm of the number of symbols in the target alphabet.
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Author: jeremy |
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Description: 高通滤波器，带通滤波器，数字FIR滤波器-The Shannon entropy is a measure of the average information content one is missing when one does not know the value of the random variable. The concept was introduced by Claude E. Shannon in his 1948 paper "A Mathematical Theory of Communication".
Shannon s entropy represents an absolute limit on the best possible lossless compression of any communication, under certain constraints: treating messages to be encoded as a sequence of independent and identically-distributed random variables, Shannon s source coding theorem shows that, in the limit, the average length of the shortest possible representation to encode the messages in a given alphabet is their entropy divided by the logarithm of the number of symbols in the target alphabet.
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Author: jeremy |
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Description: Turbo码，LDPC码（低密度奇偶校验码）均具有接近Shannon限的性能，
是目前便译码研究的热点。Turbo码在低信噪比情况下的性能优于其它各种编码
方式。而LDPC码的描述简单，具有较大的灵活性，当码长足够长时具有比Turbo
码更为良好的性能，其译码复杂度低于Turbo码。-Turbo code, LDPC code (LDPC) all have close to Shannon limit performance, it is the firm' s research focus. Turbo codes at low SNR is superior to other kinds of encoding. The simple description of LDPC codes with greater flexibility, when code length is long enough, have a much more favorable than the Turbo code performance, its decoding complexity than Turbo codes.
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Author: 欢欢牛 |
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Description: On the Design of Low-Density Parity-Check Codes
within 0.0045 dB of the Shannon Limit
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Author: ghanim |
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Description: Near Shannon Limit Performance of Low Density
Parity Check Codes
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Author: thefar2012star |
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Description: 低密度奇偶校验码(简称LDPC码)是目前距离香农限最近的一种线性纠错码，它的直接编码运算量较大，通常具有码长的二次方复杂度．为此，利用有效的校验矩阵，来降低编码的复杂度，同时研究利用大规模集成电路实现LDPC码的编码．在ISE 8．2软件平台上采用基于FPGA的Verilog HDL语言实现了有效的编码过程，为LDPC码的硬件实现和实际应用提供了依据-Abstract：Low．density parity·check code(LDPC code)is a kind of linear eror·correcting code nearest to Shannon Limit．For LDPC
cod e，the computational overhead for direct encoding operations is large，as the complexity of encod ing is the square of the length of
codeword．Hence，this paper reduces the complexity of coding by using effective parity—check matrix，and realizes the encoding device
for LDPC code by use of large·scale integrated circuits．The effective encoding process based on FPGA with Verilog HDL language is
implemented on ISE 8．2 software platform ，providing a feasible basis for hardware implementation an d practical application of LDPC
code．
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Author: 秦小星 |
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Description: LDPC(Low-density-parity-check，低密度奇偶校验)码是一类具有稀疏校验矩阵的线性分组码，不仅有逼近Shannon限的良好性能，而且译码复杂度较低，结构灵活，是近年信道编码领域的研究热点-LDPC (Low-density-parity-check, low-density parity check) codes are a class of sparse check matrix of linear block codes, is not only good performance approaching Shannon limit, and the decoding complexity low, flexible structure , the field of channel coding in recent years the research focus
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Author: qiaohui |
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Description: 通过matlab仿真实现香浓限的逼近，并进行比较。-Matlab simulation of the Shannon limit approaching, and for comparison.
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Author: 何东 |
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Description: script shannon limit how to plot it ?-script shannon limit how to plot it ?
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Size: 17408 |
Author: hoceladj |
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Description: used for shannon Capacity calc
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Author: AlyMahmod |
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