Carrier-assisted differential detection method and device based on parallel multiple delays

• Main Authors: CHI XINYU, FAN YAXUAN, LI BAOKUN, GE PEIYUN, ZHAO RUQING, YANG FAN, SUN WEIBIN, QIN PENG, BAI CHENGLIN, CAO LINGGUO, YANG LISHAN, SUN ZUKAI, XU HENGYING
• Format: Patent
• Language: Chinese; English
• Published: 30.09.2022
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The invention discloses a carrier-assisted differential detection method and device based on parallel multi-delay, and belongs to the field of short-distance optical communication, and the method comprises the steps: firstly, generating a complex numerical value double-sideband signal with a guard band at a transmitting end, and determining the width of the guard band according to the steep degree of a receiver transmission function near zero frequency; receiving the complex numerical value double-sideband signals at a receiving end by using two carrier-assisted differential detection receivers based on parallel multi-delay; and finally, respectively carrying out SSBI processing, inverse transmission function processing, down-conversion, matched filter processing, synchronization processing, equalization processing and symbol judgment processing on complex signals R1 (t) and R2 (t) obtained by the two receivers to obtain a binary bit sequence, and completing carrier-assisted differential detection based on pa