Signal processing method and system based on DQPSK

• Main Authors: ZHANG KAISHENG, LI CHAOWEI, NING PING, ZHU XUEYONG
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a signal processing method and system based on DQPSK, and the method comprises the following steps: S1, obtaining correlation values PNI (n). Ir (n), PNI (n). Qr (n), PNQ (n). Ir (n), and PNQ (n). Qr (n) according to an I-path pseudo-random code PNI (n) and a Q-path pseudo-random code PNQ (n) at a moment n, and an I-path signal Ir (n) and a Q-path signal Qr (n) received at the moment n; s2, acquiring a correlation value corrN at the n0 moment according to the correlation values PNI (n). Ir (n), PNI (n). Qr (n), PNQ (n). Ir (n) and PNQ (n). Qr (n), comparing the corrN with a preset threshold value, if the correlation value corrN at the n0 moment is greater than the preset threshold value, executing the step S3, otherwise, returning to execute the step S1; s3, entering a synchronization judgment logic process according to the correlation value corrN at the n0 moment, if the moment is judged to be a synchronization moment, executing S4, and otherwise, returning to execute S1; and S4, obta