1966年，Forney将分组码和卷积码结合起来，提出了级联码（cc， Concatenated Codes）的概念。级联码一般采用RS码为外码，卷积码为内码的编 码方式。
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提出了并行级联卷积码 PCCC ; ParallelConcatenated convolutional codes
提出了一类级联的卷积码混合译码算法。
A type of hybrid decoding (HD) algorithm for convolutional codes is proposed.
提出了卷积码与GMSK(高斯最小移频键控)调制器级联系统的一种迭代译码方案。
An iterative decoding scheme is proposed for the concatenation of a convolutional code and a GMSK modulator.
本文提出了一种新的二相编码波形-双频级联pn截断码，并对其信号处理作了详细讨论。
A new kind of binary phase codes two frequency cascade PN intercepted codes (TFCPIC) is presented, and its signal processing is also discussed in detail.
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