Zadoff-Chu sequence-based movement rate determination method

A technology of moving speed and measuring method, which is applied in the field of signal processing, can solve the problems of high complexity, tediousness, and complex realization of Doppler frequency, etc., and achieve the effect of convenient and effective Doppler frequency measurement and convenient launch

Active Publication Date: 2020-01-10
SICHUAN TIANYI COMHEART TELECOM
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Problems solved by technology

However, in the existing rate measurement, the measurement of Doppler frequency is very complicated and cumbersome. For example, the commonly used methods include passive frequency measurement method (which can be divided into resonance method and bridge method) and active comparison method. The source comparison method can be divided into beat frequency method and difference frequency method
Passive frequency measurement method (commonly used for rough frequency measurement, the accuracy is about 1%, and the implementation complexity is very high
The active method uses the linear superposition of two signals to generate the beat frequency phenomenon, and then performs frequency measurement by detecting the zero beat phenomenon. It is often used for low-frequency measurement and has high precision, but the frequency error range of the measurement is very small and the complexity is high.

Method used

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  • Zadoff-Chu sequence-based movement rate determination method
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  • Zadoff-Chu sequence-based movement rate determination method

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Embodiment Construction

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0030] In this embodiment, the wireless station transmits the part.

[0031] Build a beacon signal, such as figure 2 As shown, the frame format of the beacon signal is composed of two ends of the ZC sequence and the conjugated ZC sequence, wherein the ZC sequence is composed of a length N c The vector composition of Each element is defined as follows:

[0032]

[0033] where μ is less than N c integer, and μ and N c Mutual prime.

[0034] The conjugated ZC sequence is obtained by conjugating the ZC sequence, and each element of the conjugated ZC sequence can be expressed as

[0035]

[0036] Signal transmission, the beacon transmission method is as follows:

[0037] The transmitting antenna will cyclically transm...

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Abstract

The invention discloses a Zadoff-Chu sequence-based movement rate determination method. The method comprises the steps of: beacon signal construction, beacon signal transmission by a wireless station,beacon signal reception by a mobile station, received signal preprocessing and Doppler frequency and rate determination. The beacon signal generated through construction by adopting a Zadoff-Chu sequence is provided, the signal has a constant envelope characteristic to facilitate transmission of a wireless station and facilitate and effectively achieve Doppler frequency measurement, and the accurate Doppler frequency measurement method is achieved by utilizing Zadoff-Chu correlation characteristics, so that high-accuracy and large-range measurement of the motion speed of an object is indirectly achieved.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method for measuring moving speed based on Zadoff-Chu sequences. Background technique [0002] Non-contact speed measurement is a very important and difficult speed measurement method in practical applications, that is, when the object itself is moving / rotating, how to solve the problem of how to measure its own speed. The Doppler frequency measurement method is an excellent method to measure the velocity, and the basic principle is to realize the velocity measurement through the Doppler effect. The Doppler effect states that the received frequency of a wave becomes higher as the wave source moves closer to the observer, and becomes lower as the wave source moves away from the observer. The Doppler effect applies to all types of waves, including electromagnetic waves. Such as figure 1 As shown, in the Doppler effect of electromagnetic waves, when the mobile station moves towa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/10
CPCG01S11/10
Inventor 李俊画魏华
Owner SICHUAN TIANYI COMHEART TELECOM
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