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研究了卷积码的有限响应输入序列的特性和卷积码的误比特率的实用特性，提出了汉明距的一种解析求解法．利用这些特性和解析求解法，能够完全取代编码器设计中现有的计算机模拟方法，在搜索好码和计算误比特率方面具有明显的优越性，并可应用于Ｔｕｒｂｏ码中交织器的设计
The practical characteristics of the limited response input sequence of convolutional codes and the bit error rate of convolutional codes are studied. An analytical solution of Hamming distance is proposed. The use of these features and analytical solution method can completely replace the existing computer simulation method in encoder design, and has obvious advantages in searching good codes and calculating bit error rates, and can be applied to the design of interleaver in Turbo codes