TSM TYPE RADIO COMMUNICATION METHOD, RADIO COMMUNICATION SYSTEM, RADIO RECEPTION DEVICE, AND BASE STATION DEVICE

摘要

There are disclosed a TSM type radio communication method for enhancing the judgment accuracy of hard decision of the stealing-flag in a radio reception device for the stealing-flag contained in a signal modulated by the four-phase PSK transmitted from a base station device to the radio reception device, and a radio communication system used in this method. The device includes a hard decision unit (116). When it is judged that there is no hard decision value about the stealing-flag of the previous speech-frame, the hard decision unit (116) performs hard decision on the soft decision value about the stealing-flag of the current speech-frame with the four-phase PSK into one of the four candidates. On the other hand, when it is judged that there is a hard decision value about the stealing-flag of the previous speech-frame, the hard decision unit (116) performs hard decision on the soft decision value about the stealing-flag of the current speech-frame with the two-phase PSK into one of the two candidates.