PHASE AMBIGUITY PROCESSING METHOD AND DEVICE FOR QUADRATURE AMPLITUDE MODULATION SIGNAL

• Main Author: FEI, Aimei
• Format: Patent
• Language: English; French; German
• Published: 30.01.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A phase ambiguity processing method and device for a quadrature amplitude modulation signal are provided. The phase ambiguity processing method includes: deciding symbols on a Y polarization state and an X polarization state of a received signal, and mapping to obtain first bit information, where the received signal includes a plurality of first signals; checking and analyzing the first bit information to generate a first check result; judging the first check result to obtain a judgment result as to whether the received signal has phase ambiguity; acquiring at least one of the plurality of first signals in the received signal when the judgment result indicates that the received signal has phase ambiguity; performing phase rotation on the first signal to obtain a second signal; and checking and analyzing the second signal, storing the second signal so that the first signal is replaced with the second signal for decoding processing if a check result is normal. A QAM signal is checked and judged, and error correction is carried out on the QAM signal when the QAM signal has phase ambiguity, such that the error rate of differential decoding of the QAM signal is reduced, system overhead is reduced, and system performance is improved.