摘要
极化码是编码领域的一个新的研究方向。设基本信道的参数发生变化,一定会对极化码的性能造成影响,研究发现极化码在二进制删除信道(BEC)下巴氏参数(Z参数)具有单调性,且假设给定一个Z参数的门限γ,那么Z≤γ的信道定义为可用信道,发现若基本信道的擦除符号ε变为ε-▽ε时,经证明发现原来可用的信道仍然全部是可用信道。另外经过研究发现极化码在BEC信道下虽然不具备针对不同的ε参数有全排序的能力,但是具有部分可排序的性质。
Polar code is a new research direction in coding field.As the channel of polar code is a re-constructed channel using many basic channels（W）,the parameters change of basic channel would influence the performance of polar code.Research indicates that the Z Parameter of polar lode under BEC channel is monotonous.With a threshold γ for the Z parameter,then Z≤γ channels are defined as effective channels.In-depth study shows that,if erase symbol of basic channel changes from ε to ε-▽ε,all the effective channels before are still effective.In addition,research also indicates that the polar code under BEC channel is of no whole-sort ability for different ε,but has the part-sort nature.
出处
《通信技术》
2012年第9期33-35,共3页
Communications Technology
