Signal processing method and related equipment thereof
A technology of signal processing and receiving equipment, which is applied in the field of signal processing methods and related equipment, can solve problems such as system parameter measurement deviations and affect system performance, and achieve the goals of improving accuracy, improving system performance, and increasing safety and reliability Effect
Active Publication Date: 2019-12-06
HUAWEI TECH CO LTD
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[0005] The embodiment of the present application provides a signal processing method and related equipment, which are used to solve the problem of deviations in the measurement of system parameters in a continuous quantum key distribution system, which affects system performance
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[0134] The embodiment of the present application can be applied to the key generation in the continuous quantum key distribution system. The main technology used by the receiving end to detect the signal is the balanced zero-beat detection technology. It is a method of extracting the coded information carried on the signal light by interfering with vibrating light pulses. The signal light and the local oscillator light are both pulsed light, the pulse frequency is the same, and the timing alignment has been achieved during the interference, and the original signal is amplified after the interference. If the original signal is small, but the local oscillator signal is strong, then the two The result of multiplication will be larger than the direct measurement of the original signal. Balanced zero-beat detection uses a beam splitter to realize the above-mentioned interference process. After the local oscillator light interferes with the signal light, two channels of signal light ...
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The embodiment of the invention provides a signal processing method and related equipment thereof, which are used for improving the accuracy of system parameter measurement and improving the system performance. The method provided by the embodiment of the invention comprises the steps of generating an optical pulse; modulating the optical pulse to obtain a target quantum pulse sequence, the targetquantum pulse sequence comprising the N first pulses and a second pulse carrying data information, the pulse intensities of the N first pulses being within a preset intensity range, and N being an integer greater than or equal to 1; obtaining target position information of the N first pulses in the target quantum pulse sequence; and sending the target quantum pulse sequence and the target position information to a receiving device.
Description
technical field [0001] The present application relates to the field of communications, and in particular to a signal processing method and related equipment. Background technique [0002] Quantum key distribution (English full name: quantum key distribution, English abbreviation: QKD) is divided into continuous quantum key distribution (English full name: continuous-variable quantum key distribution, English abbreviation: CV-QKD) and discrete quantum key distribution (English Full name: discrete-variable quantum keydistribution, English abbreviation: DV-QKD), the purpose of using quantum key distribution in quantum communication is to establish a secure key between two users, which is guaranteed by the principle of quantum mechanics Its physical unconditional security, this feature can provide a strong guarantee for the user's communication security. In the CV-QKD system, the receiver uses balanced zero-beat detection technology to detect the signal. The principle is that a...
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IPC IPC(8): H04L9/08H04B10/70H04B10/524
CPCH04B10/524H04B10/70H04L9/0852H04L9/0858
Inventor 蔡永旌李政宇邹扬
Owner HUAWEI TECH CO LTD