DECODING DEVICE AND DECODING METHOD

摘要

An encoding unit (205) encodes again decoded data stored in a decoded data storage unit (204). A data conversion unit (206) converts the data '0' and '1' outputted from the encoding unit (205) to '1' and '-1', respectively in accordance with the data conversion made at the communication party. A product-sum operation unit (207) multiplies the data outputted from the data conversion unit (206) and the demodulated data (soft decision data) stored in a demodulated data storage unit (201), adds the product for one TTI, and stores the product-sum results at every data rate. A data rate judging unit (208) judges the data rate corresponding to the maximum of the product-sum results as the data rate of the demodulated data. As a result, the judgment accuracy of the judgment on the data rates can be improved to reduce the decoding error of a received signal.