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Carrier frequency and angle of arrival joint estimation undersampling method based on cross array

A cross array, joint estimation technology, applied in the field of signal processing, can solve problems such as inability to work, and achieve the effect of improving the robustness of the system

Pending Publication Date: 2022-03-15
HARBIN INST OF TECH
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Problems solved by technology

But none of the current methods work in the presence of coherent sources

Method used

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  • Carrier frequency and angle of arrival joint estimation undersampling method based on cross array
  • Carrier frequency and angle of arrival joint estimation undersampling method based on cross array
  • Carrier frequency and angle of arrival joint estimation undersampling method based on cross array

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Embodiment Construction

[0059] The technical solutions in the embodiments of the present invention will be described in conjunction with the accompanying drawings in which the drawings in the embodiments of the present invention will be described, and it is clearly, and the described embodiments are merely embodiments of the invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art are in the range of the present invention without making creative labor premise.

[0060] A cross-array-based and reaching angle integrated estimate, the estimated yawning method includes the following steps:

[0061] Step 1: Use the cross array to modulate the broadband converter receiving structure to sample, obtain each channel sampling value x [k] and y [k];

[0062] The cross array modulated broadband converter is specifically,

[0063] Far-field narrowband signal s considering M continuous time i (t), where i = 1, ..., M,...

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Abstract

The invention discloses a carrier frequency and angle of arrival joint estimation undersampling method based on a cross array. The method comprises the following steps of: 1, sampling by using a cross array modulation broadband converter receiving structure to obtain sampling values x [k] and y [k] of each channel; step 2, determining a trilinear model based on the sampling point number Q of each channel in the step 1; step 3, determining an estimation factor matrix from the trilinear model by using an interlaced least square method; step 4, pairing elements in the matrix in the step 3; and step 5, calculating carrier frequency and DOA for the matrix paired in the step 4 and the defined difference matrix. The invention aims to solve the problems of high sampling rate and information redundancy of joint estimation of broadband sparse signal DOA and carrier frequency under the Nyquist sampling theory.

Description

Technical field [0001] The present invention belongs to the field of signal processing, and more particularly to a cross-wave frequency and reaching angle combination estimate based on a cross array. Background technique [0002] The combined multi-parameter estimates have attracted extensive attention in recent years, and has been studied in many engineering applications such as radar, sonar, and wireless communications. The carrier frequency and arrival angle (DOA) is an important feature of the identification signal, and its joint estimate is the hotspot for the current array signal processing research. [0003] In practical applications, coherent signals are often generated due to multipath propagation or enemy interference. In the traditional DOA estimation algorithm, the coherence of the signal can cause the rank and severely affecting the performance of DOA. So far, many scholars have studied the carrier frequency and DOA joint estimation algorithm for coherent signals, ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30
CPCH03M7/3062
Inventor 付宁姜思仪尉志良乔立岩彭喜元
Owner HARBIN INST OF TECH
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