A Pseudo-Random Code Phase Modulation Continuous Wave Radar Ranging Deambiguation Method

A technology of pseudo-random code and wave radar, which is applied in the field of distance measurement of miniaturized pseudo-random code modulated continuous wave radar, which can solve the problems that the sliding window processing method cannot be carried out, disturbing the continuity of signal reception, and affecting radar performance, etc.

Inactive Publication Date: 2011-12-21
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0002] At present, in domestic and foreign pseudo-random code modulated continuous wave radars, the method of alternately transmitting staggered codes within a radar measurement cycle is used to calculate the target distance. This ranging method sacri

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  • A Pseudo-Random Code Phase Modulation Continuous Wave Radar Ranging Deambiguation Method
  • A Pseudo-Random Code Phase Modulation Continuous Wave Radar Ranging Deambiguation Method
  • A Pseudo-Random Code Phase Modulation Continuous Wave Radar Ranging Deambiguation Method

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Embodiment Construction

[0056] (1) The continuous wave radar uses two groups of pseudo-codes with different clock frequencies a and b to send them alternately according to the radar scanning circle. Each scanning circle continuously sends a group of pseudo-codes. When the m-th circle sends a group of pseudo-codes, the first Group b pseudocode is sent in circle m+1, m is a natural number, representing the current number of scanning circles;

[0057] In the embodiment, the pseudocode a clock frequency is selected as 2.8MHz, the pseudocode b clock frequency is selected as 3.1MHz, and the pseudocode code length is selected as 31 bits, the unambiguous distance corresponding to pseudocode a is: 1.66km, and pseudocode b corresponds to The unambiguous distance is: 1.5km, alternately according to the scanning circle, scanning rate: 1 circle / second;

[0058] (2) The radar respectively receives the electromagnetic wave signals reflected by the target, and extracts the target parameters from them. The target p...

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Abstract

The invention discloses a distance measuring defuzzification method for a pseudo-random code phase modulation continuous-wave radar, which is used for measuring a target distance in the field of continuous-wave radars. In the method, phase modulation is performed on carrier waves alternatively on circles by using a stagger pseudo-random code, and distance fuzzy resolution is performed by using a target distance remainder of two adjacent circles obtained by measuring, so that the real distance of a target can be determined. The method can replace the conventional pseudo-random code real-time alternate measuring method, and the detection and processing performance of the radar can be enhanced.

Description

technical field [0001] The invention relates to a method for calculating target distance in the field of continuous wave pseudo-random code modulation radar, and is especially suitable for distance measurement of miniaturized pseudo-random code modulation continuous wave radar. Background technique [0002] At present, in domestic and foreign pseudo-random code modulated continuous wave radars, the method of alternately transmitting staggered codes within a radar measurement cycle is used to calculate the target distance. This ranging method sacrifices more than half of the measurement time, and because of this real-time Alternate measurement disrupts the continuity of signal reception, making further signal processing, such as sliding window processing, impossible, which affects the performance of the radar. Contents of the invention [0003] The problem to be solved by the present invention is to propose a distance measurement method of alternating wheel method with stag...

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Application Information

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IPC IPC(8): G01S7/41G01S13/08
Inventor 赵锦华卫青春赵向阳陈镜刘兵赵华敏夏烨巍高跃清马瑞平张红旗陈旸
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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