convolutional encode

Given the convolutional encode defined by:

 

And assuming data is fed into the shiftregister one bit at a time:

1)Draw the encoder.

2)Tree diagram to four levels.

Solution:

(n,m,k)  此题n=1,m=2,k=3

1)


2)开始移入寄存器为0或1(上为0,下为1),如图1所示,此时u1u2=00,(每一次分叉寄存器内的值右移1位),如图2所示,最左端寄存器值为空,可输入0或1,输入0时,u1u2=00;输入1时,u1u2=11;以此类推,执行的是异或功能

       图 1                            图 2


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转载自blog.csdn.net/qq_35801251/article/details/80949056