2019 年 23 巻 4 号 p. 163-166
In optical-wireless communications, an advanced framed-differential on-off keying (AF-DOOK) system has been proposed by the authors. The AF-DOOK system can solve an optimum decision level adjustment problem and bit-slip problem in the conventional on-off keying (OOK) system. Moreover, the AF-DOOK system can detect frame errors by frame error detecting schemes, named the parity check method and the polarity check method. In this study, the polarity check method for the AF-DOOK system is investigated. In particular, the performance of frame error detection is evaluated by theoretical analysis. As a result, for the AF-DOOK system, the frame error detection probability of the polarity check method is found to be better than that of the parity check method. Moreover, it is clarified that there is a minimum frame error misdetection probability.