Optical quantum OFDM communication system and quantum information detection method thereof

Abstract

The invention discloses an optical quantum OFDM communication system and a quantum information detection method thereof. The invention introduces the orthogonal frequency division multiplexing technology to the quantum communication, and provides the quantum communication system based on an all-optical OFDM model; meanwhile, the invention presents that a transmitted quantum state symbol set is expanded under the optical quantum digital state representation, and the minimum square root measurement (SRM) method with better performance in the positive operator valued measure (POVM) is used for algorithm measurement. The invention gives the system design and the basic principle explanation and performance simulation method and result, and performs simulation on the quantum state detection performance and part factors affecting the system performance separately. Results show that for the optical quantum OFDM system, the bit error rate performance of the quantum detection method based on theminimum square root is better than that of the classical detection method.

Description

technical field [0001] The invention relates to an optical quantum OFDM communication system and a quantum information detection method thereof, belonging to the technical field of deep space communication measurement. Background technique [0002] In deep space exploration missions, the communication system shoulders the tasks of transmitting telemetry information, tracking and navigation, and transmitting scientific data, which is an important guarantee for the smooth execution of the entire deep space exploration mission. Deep space communication generally refers to the communication between various types of aircraft leaving earth orbit and between the aircraft and the ground control center. Different from general traditional ground communication and near-Earth satellite communication, deep space communication has characteristics such as long distance, weak signal, large and unstable delay, and large amount of data. Although traditional optical communication has large inf...

AI Technical Summary

Problems solved by technology

Different from general traditional ground communication and near-Earth satellite communication, deep space communication has characteristics such as long distance, weak signal, large and unstable delay, and large amount of data. Although traditional optical communication has large information capacity, small size, Low power consumption and other advantages, but still encounter bottlenecks in issues such as security, weak signal detection, unstable delay, etc.

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