On Space Time Concatenated Codes
The presented work examines convolutional coding with linear and non-linear modulation over Multiple-Input-Multiple-Output channel, which is presented in mobile communication systems. A mathematical description of the transmission is given considering both, the space and the time dimensions. The problem of the code design over both transmission dimensions is solved by through the classical coding theory. Concatenated schemes based on convolutional codes are used to construct space time codes. The generator matrices of the convolutional codes are analyzed in order to define design criteria which guarantee the full diversity of the associated space time codes. The design criteria are derived for linear and non-linear modulation. The analyzed code structures allow to construct full diversity space time codes with flexible rates, which have a better performance than existing codes with comparable parameters.