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A Frequency Shift Keying Continuous Wave fsk-cw Radar

A FSK-CW, frequency shift keying technology, used in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve problems such as clear answers that have not been reported in public literature

Inactive Publication Date: 2018-07-27
邹谋炎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many references about FSK-CW radar, the clear answer to the first question has not been reported in the public literature

Method used

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  • A Frequency Shift Keying Continuous Wave fsk-cw Radar
  • A Frequency Shift Keying Continuous Wave fsk-cw Radar
  • A Frequency Shift Keying Continuous Wave fsk-cw Radar

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Embodiment Construction

[0031] Two frequency values ​​f in FSK-CW radar 1 and f 2 , or one of the frequency values ​​and the frequency difference Δf=f 2 -f 1 , their accuracy and stability determine the accuracy of the radar to measure the target distance, speed, and relative direction of movement. In general, a phase-locked loop (PLL) approach should be used to generate the two frequencies f 1 and f 2 . At this time, their accuracy and stability are easily guaranteed. However, the radar transmitting source including PLL has many circuit components, which makes the overall cost of the radar relatively high. In actual situations, no matter it is the application of automobile collision avoidance or vehicle speed monitoring, the accuracy requirements for the radar to measure the distance and speed of the target are not very strict, and the application market is very sensitive to the price of the radar, so designers have to consider more Low-cost radar implementation. In the low-cost FSK-CW radar...

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Abstract

The invention provides a frequency-shift keying continuous wave (FSK-CW) radar which is formed by an FSK modulator, a microwave voltage-controlled oscillator, a microwave front end, an antenna, a microwave mixer, an intermediate-frequency low-noise amplifier, an FSK demodulator, a double channel reconstruction filter amplifier, a double channel analog-digital converter, a word synchronization signal generator and a DSP processor. On the basis of analyzing the fundamental principle of an FSK radar, the invention provides the most important principle of the design of a receiving system, provides a specific scheme for realizing FSK modulation, demodulation and synchronization, provides three schemes for realizing the microwave front end and provides an effective method for digital signal processing. According to the FSK-CW radar design and realization method, the lowest-cost and effective FSK radar can be produced; and the FSK radar is used for the field of traffic safety, and is used for realizing measurement of relative distance, speed and moving direction of target vehicles.

Description

technical field [0001] The invention relates to the fields of electronic information and traffic safety, and proposes a simple and low-cost method for designing and realizing FSK-CW radar. This radar has the ability to measure speed, range and determine the direction of movement of the target vehicle relative to the radar. technical background [0002] The frequency-shift keying continuous wave (FSK-CW) scheme has been successfully used to design low-cost civilian radars, such as automotive forward collision avoidance radars and monitoring radars for road management. Compared with ordinary single-frequency speed-measuring radar, FSK-CW radar has two important advantages besides being able to achieve the same speed-measuring accuracy. One is that the FSK-CW radar has a ranging capability that meets the appropriate requirements for automotive collision avoidance and enables more accurate vehicle position determination in highway safety management applications. The second is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/58
CPCG01S13/584
Inventor 邹谋炎
Owner 邹谋炎
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