Serial concatenation of interleaved convolutional codes and M-ary continuous phase modulations

摘要

We consider the serial concatenation of a convolution- nal code and a continuous phase modulation separated by a random interleaver. It is shown that the continuous phase modulator has the same behavior as a recursive systematic convolutional code in serial turbo codes. The interleaver gain produced by the modulator and the ran- dom interleaving depends only on the minimum Ham- ming distance of the outer code.