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Signal scrambling and descrambling method and device, and sensor

A sensor and signal technology, applied in the field of signal scrambling and descrambling, can solve the problems of increasing the probability of false alarms, system phase difference, and the reduction of signal-to-noise ratio of echo signals, etc., to reduce the probability of false alarms, reduce performance requirements, and improve detection capabilities Effect

Pending Publication Date: 2021-06-08
CALTERAH SEMICON TECH SHANGHAI CO LTD
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Problems solved by technology

[0005] However, the traditional phase scrambling will produce a system phase difference, which will lead to a decrease in the signal-to-noise ratio of the echo signal, increase the probability of false alarms, and cause a decrease in the accuracy of target detection

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  • Signal scrambling and descrambling method and device, and sensor
  • Signal scrambling and descrambling method and device, and sensor
  • Signal scrambling and descrambling method and device, and sensor

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Embodiment Construction

[0081] In order to make the above objects, features and advantages of the present application more obvious and understandable, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0082] In order to facilitate understanding of the technical solutions provided by the embodiments of the present application, radar is taken as an example below to describe related background technologies in sensors.

[0083] Wherein, the phase scrambling refers to that the transmitting end uses a pseudo-random sequence code to scramble the initial phase of a unit (such as chirp, ie chirp) signal in the input initial signal. Specifically, the phase of the chirp signal corresponding to "0" in the pseudo-random sequence code remains unchanged as Φ1, and the phase of the chirp signal corresponding to "1" in the pseudo-random sequence code is scrambled, and the phase becomes Φ2. Among the...

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Abstract

The embodiment of the invention discloses a signal scrambling and descrambling method and device, and a sensor. Particularly, the sensor performs phase scrambling on a local oscillator signal according to a scrambling parameter to obtain a scrambled signal, and obtains a transmitting signal according to the scrambled signal. Besides, the sensor receives an echo signal formed by reflection of the transmitting signal, phase descrambling is achieved while frequency mixing is performed on the echo signal through a scrambling signal, a descrambled intermediate-frequency signal is obtained, and target detection is achieved by carrying out signal processing on the intermediate-frequency signal. Therefore, according to the method provided by the embodiment of the invention, the phase scrambling performed by a transmitting end is transparent for a receiving end, and the problem of a system phase difference caused by limitation of hardware equipment can be solved without adding an additional phase descrambling module so that a false alarm probability is effectively reduced, and the detection capability of the target object is improved.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 202010131567.8 and the title of the invention "a signal phase descrambling method, device and radar system" submitted to the China Patent Office on February 28, 2020, the entire content of which is incorporated by reference incorporated in this application. technical field [0002] The present application relates to the technical field of signal anti-jamming, in particular to a method, device and sensor for signal scrambling and descrambling. Background technique [0003] With the development of target detection technology, the task of the sensor can not only measure the distance, azimuth and elevation angle of the target, but also measure the target speed, and obtain more information about the target from the echo signal. [0004] In order to improve the accuracy of the sensor measurement target and avoid interference, usually, it can be realized by phase scrambling. Fo...

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Application Information

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IPC IPC(8): G01S7/282G01S7/292G01S7/35G01S7/36
CPCG01S7/282G01S7/2923G01S7/2927G01S7/35G01S7/354G01S7/36
Inventor 张艳群朱砚陈嘉澍
Owner CALTERAH SEMICON TECH SHANGHAI CO LTD
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