linear adj. 1.线的,直线的。 2.长度的。 3.【数学】一次的,线性的。 4.【动、植】线状的;细长的。 5.由线条组成的,以线条为主的,强调线条的。 linear amplification 直线放大。 a linear equation 一次方程式。 a linear leaf 线形叶。 linear arts 线条艺术。
The efficient encoding problem of ldpc codes is discussed in detail , and the reasons that tornado codes and repeat accumulate codes are linear encode - able and the relationships between them and efficient encode - able ldpc codes are presented . two constructions of linear encode - able ldpc codes are brought up and their performances under awgn channels are simulated 对低密度校验码的快速编码问题进行了深入研究,指出了旋风码和重复累积码能够达到线性编码的原因及其与可快速编码的低密度校验码之间的关系,提出了两种可线性编码的低密度校验码的构造方法并对其在高斯信道下的纠错性能进行了仿真。
At the same time , a novel approach to construction of ldpc codes based on the permutation matrix was proposed which got a parity check matrix with the shortest girth is 6 . these codes keep the advantage of linear encoding and become more flexible . simulations show that the performance of short length codes of this kind is as excellent as other ldpc codes 同时提出一种基于置换阵循环移位的构造方法,得到的校验矩阵围长至少为6 ,且保持编码的线性复杂度,码率灵活,仿真结果验证了置换阵ldpc码码长较短时,在高斯信道下性能接近或超过现有其他构造方式的ldpc码。