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Microwave photon array-based ultra wideband signal direction of arrival estimation method

An ultra-wideband signal and direction of arrival technology, applied in the field of optoelectronic communication, can solve the problems of low estimation efficiency and estimation accuracy, and achieve the effects of reducing the amount of computation, improving the estimation accuracy, and improving the estimation efficiency.

Active Publication Date: 2019-01-01
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and propose a method for estimating the direction of arrival of ultra-wideband signals based on microwave photon arrays, which is used to solve the problem of estimating the direction of arrival of ultra-wideband signals in the prior art Technical issues with low efficiency and estimation accuracy

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:

[0043] refer to figure 1 . The estimation system used to realize the present invention includes a microwave photon array and a first-order sideband signal generator. Place m antennas at equal intervals in space, m=1...M, m≥2, defined as antenna 1, antenna 2,..., antenna m,..., antenna M, the distance between adjacent antennas is d, m In the microwave photonic array composed of parallel antennas, the mth antenna is cascaded with a Mach-Zehnder modulator MZM-m, a filter F-m and an optical power meter OPM-m. The first-order sideband signal generator is to connect the laser signal source antenna 0, and a filter F-0 in parallel to the Mach-Zehnder modulator MZM-0. The filter F-0 in the first-order sideband signal generator is connected to each antenna in the microwave photon array D, and each optical power meter in the microwave microwave photon a...

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Abstract

The invention provides a microwave photon array-based ultra wideband signal direction of arrival estimation method, so as to solve the technical problems of low ultra wideband signal direction of arrival estimation efficiency and low estimation precision existing in the prior art. The method comprises steps: 1) a first-order sideband signal E0(t) is acquired; 2) a microwave photon array D is built; 3) the light power Pm of an ultra wideband signal Em outputted by the microwave photon array D is acquired; 4) a light power ratio vector Q is defined; 5) an M*Ntheta-dimension matrix as described in the specifications related to an array flow pattern vector as described in the specifications is defined; 6) the phase phim of the ultra wideband signal Em outputted by the microwave photon array Dis acquired; and 7) the direction of arrival thetam of the ultra wideband signal Em outputted by the microwave photon array D is calculated.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic communication, and relates to a method for estimating a direction of arrival of an ultra-wideband signal, in particular to a method for estimating a direction of arrival of an ultra-wideband signal based on a microwave photon array, which can be used for target detection and passive positioning. Background technique [0002] UWB signal DOA estimation is a technology that uses the antenna array in space to receive signals from multiple signal sources in different directions, and uses modern signal processing methods to quickly and accurately obtain the direction of the signal source. It is used in radar, sonar, wireless communication It has important application value in other fields. Among the models constructed for this problem, the subspace-based model appeared earlier and was widely used, and most of the previous UWB signal DOA estimates were generated using this model. [0003] At pres...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 蔡晶晶李鹏车金鸽武斌
Owner XIDIAN UNIV
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