2) QC-LDPC code
准循环LDPC码
1.
The paper proposes to improve the robustness of watermark and protect the copyright of digital works,forward error correction based on QC-LDPC code can be applied in watermarking,intending to lower the detection error rate.
鲁棒性是数字水印的重要指标之一,提出将准循环LDPC码的前向纠错技术应用于数字版权的保护中,利用准循环LDPC码较强的前向纠错能力,来提高数字水印的鲁棒性。
3) QC LDPC codes
准循环LDPC码
1.
This paper discusses the performance of QC LDPC codes on counteracting the pulse noise using improved BP decoding algorithm with this model.
文章将电力线信道建模为加性白色A类噪声信道,在该信道模型中采用改进BP译码算法,研究准循环LDPC码的抗脉冲噪声性能,给出了在不同迭代次数下的仿真结果(表现出不同的译码性能)。
2.
The key to improving the performance of QC LDPC codes is how to construct a parity-check matrix H with a girth distribution as good as possible.
在准循环LDPC码的构造中,校验矩阵拥有尽可能好的girth分布对于改善码的性能有着重要的意义。
4) quasi-cyclic LDPC (QC-LDPC) codes
拟循环LDPC码(QC-LDPC码)
5) quasi-cyclic code
准循环码
1.
It is shown that a code of the length n over F_p+uF_p+…+u~kF_p is linear if and only if its Gray image is linear,and a code of the length n is cyclic if and only if its Gray image is a quasi-cyclic code over F_p of the index p~(k-1) and the length p~k n.
定义了环(Fp+uFp+…+ukFp)n到Fppkn的一个Gray映射;给出Gray映射的几个性质,证明环Fp+uFp+…+ukFp上的长为n的线性码的Gray像仍是线性码;及该环上长为n的(1-uk)-循环码的Gray像是域Fp上的长为pkn、指数为pk-1的准循环码。
2.
It is also shown that the generalized Gray map image of the((1-p~k)-cyclic) code is a distance-invariant(not necessarily linear) quasi-cyclic code.
文章引入了Zpk+1码和Zp2码之间的等距同构kφ(k≥1);利用kφ把G ray映射∶Zn4→F22n推广为∶Znpk+1→ZPpkn(p为素数);而且利用kφ,负循环码概念被推广到Zpk+1码,得到了(1-pk)-循环码;依据等距同构φk,给出了这些码的表示;也证明了(1-pk)-循环码在推广的G ray映射下的像是距离不变(不一定是线性的)的准循环码。
3.
A necessary and sufficient condition for the Gray image of quasi-cyclic code to be cyclic is given.
最后,证明了码C是环Zp[u]/(um-1)上一个循环码的充分必要条件为它的Gray映射下的像是一个准循环码。
6) quasi-cyclic codes
准循环码
1.
Recently, the study of quasi-cyclic codes over fields have provided many useful results in coding theory.
近年来,域上准循环码的研究为编码理论提供了很多丰富的结果。
2.
In this paper,we first introduce the conception of quasi-cyclic codes,then thoroughly study the method of constructing quasi-cyclic codes,and finally discuss the connection between quasi-cyclic codes and double cyclic codes and the implementing method of double cyclic codes encoding circuit.
文章首先简述了准循环码的概念,然后较为深入地研究了准循环码生成方法,最后讨论了双环循环码与准循环码的关系及其编码的电路实现。
补充资料：循环码
见分组码。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条