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- In chinese national standard for Digital Multimedia Terrestrial Broadcasting（DMB-T），QC irregular LDPC code is used as forward error correction coding. 摘要 在我国的数字电视广播地面传输标准DMB-T中，使用了准循环非规则LDPC码作为前向纠错编码。
- In this paper a method using quadratic congruential sequences to design regular LDPC code is proposed. 本文提出了二次同余序列构造规则LDPC码的方法。
- Simulation results show that they have excellent performance, especially the IRA code performs better than the irregular LDPC code of DVB-S2. 仿真结果表明，用这种方法构造的规则码和非规则码都具有优良的性能，特别是非规则码的性能优于DVB-S2的非规则码。
- In condition of transmitting middle - short frames, the invention is superior to performance of traditional random structured LDPC code. 将其使用在数字通信系统中的中短帧传输条件下，显著优越于常规的随机构造的LDPC码的性能。
- According to the structure of Quasi-Cyclic LDPC code, we can make a trade-off between hardware complexity and decoding throughput by applying semi-parallel architecture. 摘要利用准循环LDPC码的结构特点，使用半并行结构的译码器可以实现复杂度和译码速率的有效折中。
- The method used a parity-check matrix of a short LDPC code as its mother matrix upon which a long code was constructed with circulant permutation matrices. 该方法利用一个短的LDPC码的校验矩阵作为其母矩阵，在此基础上采用循环置换矩阵构造一个长的LDPC码。
- Beth turbo codes and LDPC codes can achieve the Shannon limited performance. Turbo码和LDPC码都可以实现接近Shannon理论极限的性能。
- Combining MIMO-OFDM soft-decision detection with LDPC code soft log likelihood ratio decoding,a joint iterative detection and decoding algorithm with low complexity and high performance was presented. 结合MIMO-OFDM的软判决检测和LDPC码的软对数似然比译码,本文给出了系统的一种低复杂度高性能的联合迭代检测译码算法。
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- This paper also introduces the application of LDPC codes,especially its application in the STC- OFDM system. 文中还讨论了LDPC码的应用,主要是在STC-OFDM系统中的应用。
- A new hardware implementation of LDPC coding arithmetic in DVB-S2 system based on FPGA is introduced. 摘要提出了一种基于FPGA的DVB-S2系统中LDPC编码算法的硬件实现技术。
- After describing elements of LDPC codes, LDPC coded WCDMA downlinks were constructed, meanwhile, decoding process was improved. 在讨论了LDPC码的基本原理之后,构建了基于LDPC码的WCDMA下行链路,改进了LDPC码的译码过程。
- Irregular LDPC codes have Unequal Error Protection (UEP) properly, however, that is difficult to utilize due to their random encoding. 摘要非规则LDPC码具有不等错误保护特性，但随机编码过程使这一特性很难得以充分利用。
- A decoding method for LDPC codes concatenated by multiple Cyclic Redundancy Checks (CRCs) has improved the convergence of the decoding effectively. 级联多个循环冗余校验(CRC)的LDPC译码算法有效地改善了译码的收敛特性。
- This paper firstly overviews the efficient encoding of LDPC codes, based on which we proposes a linear encoding for UEP. 首先回顾了LDPC码的有效编码，然后在此基础上提出了一种应用于不等错误保护的线性复杂度编码方法。
- In this paper, an improved iterative decoding algorithm based on averaged Log-Likelihood Ratio (LLR) is proposed for LDPC coded BICM systems. 该文针对LDPC码编码的BICM系统，提出一种对LDPC码译码器输出外附信息的计算方法进行改进的迭代解调/译码算法。
- The watermark is first LDPC coded and embeds into the host signal, then retrieves from the watermarked works using LDPC iterative methods. 在指纹信息嵌入之前，先对指纹序列进行LDPC编码，然后把指纹嵌入到符合人眼视觉特性的小波域中,并采用了LDPC 迭代译码算法进行指纹序列的提取。
- Based on the theory of density evolution,the paper proposes an algorithm to optimize the uniform or ununiform quantized Min-Sum decoder for regular or irregular LDPC codes. 本文根据密度进化理论,对规则/非规则的低密度校验码提出了一种算法,该算法能优化最小和均匀/非均匀量化译码器的设计。
- Through modifying the object function of the new algorithm, a proper tradeoff can be realized between LTF and ALTF for more satisfying performance parameters of LDPC codes. 该算法不仅可以进一步提高优化性能,还可以通过修改目标函数在下三角和准下三角之间合理均衡以便确定LDPC编码优化的最佳性能参数。
- The proposed scheme considers Unequal Error Protection (UEP) of irregular LDPC codes as well as degree distribution while choosing some bits for retransmission. 该方案在选择重传信息的过程中，不仅考虑了节点度分布的影响，而且考虑了非规则LDPC码字自身的不均等错误保护特性。
