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DOA (direction of arrival) estimation and positioning method using hybrid ADC (analog-to-digital converter)

A technology of DOA and target positioning, which is applied in direction finders using radio waves, positioning, radio wave direction/deviation determination systems, etc., can solve problems such as narrow main lobe beam width, and achieve a balance between computational complexity and performance. Complexity and good performance

Pending Publication Date: 2022-01-11
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the number of antennas increases, the beamwidth of the main lobe becomes narrower

Method used

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  • DOA (direction of arrival) estimation and positioning method using hybrid ADC (analog-to-digital converter)
  • DOA (direction of arrival) estimation and positioning method using hybrid ADC (analog-to-digital converter)
  • DOA (direction of arrival) estimation and positioning method using hybrid ADC (analog-to-digital converter)

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Embodiment 1

[0048] See Figure 1 to 2 , A first aspect of the present invention discloses a method of using a mixed DOA estimation ADC, comprising the steps of:

[0049] Sl, obtaining a reception signal Leida Zi array, and sampling the received signal covariance of the singular value decomposition to obtain a plurality of values ​​Laid diagnosis based on a plurality of feature values, it is determined whether the detected targets;

[0050] In practice, the covariance matrix is ​​not available, we can only be estimated from sampling data, the sampling covariance estimation of the reception signal obtained by the following formula:

[0051]

[0052]The estimated sampling covariance is decomposed to obtain a plurality of feature values:

[0053]

[0054] In the formula, L is the number of sampling, Y [n] is the discrete form of the received signal, and we obtain the estimated value of the covariance matrix RY based on the known reception signal, where E S Is the K × 1 Vitrators corresponding ...

Embodiment 2

[0090] See Figure 3 to 4 The second embodiment of the present invention discloses a target positioning method using a mixed ADC to perform a DOA estimate using a DOA estimation method as in the embodiment, and target positioning according to the DOA estimation result, and its target positioning method includes the following steps:

[0091] Step 1, using the spectral calculation method to the output Y of multiple sub-array 1 (n) Perform DOA estimation, get distance, and orientation information;

[0092] Step two, multiple distances and geometric centers of the intersection area of ​​the orientation information, that is, the target location.

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Abstract

The invention provides a DOA estimation method using a hybrid ADC, and the method comprises the following steps: dividing N antennas in a radar array into K sub-arrays, wherein each sub-array is provided with M antennas; enabling at least one radar sub-array to obtain a received signal, carrying out the singular value decomposition of the sampling covariance of the received signal, obtaining a plurality of feature values, and judging whether a target is detected or not based on the plurality of feature values; and if a target is detected, carrying out analog beam forming on the received signal through an analog phase shifter to form a frequency band signal, converting the frequency band signal into a baseband signal through a radio frequency chain, then quantizing the baseband signal into a digital signal through an analog-to-digital converter, and carrying out DOA estimation on the digital signal.

Description

Technical field [0001] The present invention relates to a wireless communication system to a large-scale measuring MIMO estimation and positioning technology, and in particular relates to a hybrid ADC and targeting methods of DOA estimation. Background technique [0002] Since the emergence of wireless communications, radio direction finding also will go through a very long time. DOA estimation because of its network in wireless communication, physical, mobile communication, navigation, tracking, passive detection, and applications need to locate in more and more people's attention. Large-scale multiple-input multiple-output (MIMO) in recent years because it can achieve a tenfold increase in speed and energy efficiency and concern. However, as the number of antennas, the beam width of the main lobe becomes narrower. Thus, with a large number of antennas in the MIMO system is widely embodiment of a large-scale ultra-precise DOA proposed requirements. Inventive content [0003] Ob...

Claims

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Application Information

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IPC IPC(8): G01S3/14G01S5/02
CPCG01S3/14G01S5/0257
Inventor 束锋揭琦娟黄梦醒冯思玲毋媛媛史柏华李逸凡占习超丁耀晖孙钟文张鹏王雪辉董榕恩
Owner HAINAN UNIVERSITY