Technical Articles – Tektroni Millimeter Poe Rada Test Solution

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With the rapid development of modern science and technology, the number of people’s living standards is rapidly increased, and the number of car insurance has increased rapidly. Traffic accidents have risen sharply, and automotive safety issues are generally concerned. The automobile anti-collision system can prevent it to block the traffic accidents. Also in the high-end automotive field, people are increasingly eager for high-tech security, combined with signal processing technology to realize automotive independent intelligent cruise, auxiliary parking, car anti-collision radar, etc. have changed people’s traditional automotive electronics Awareness. The millimeter wave radar is widely adopted by the advantages of high hardware volume and small hardware size. More and more vehicles use one or more millimeter wave radar to assist the driver’s driving operation to improve the comfort and safety of driving and avoid the occurrence of traffic accidents.

Millimeter wave radar can realize multiple functions of automatic driving, and the sensors used by ADAS mainly include camera, millimeter wave radar, laser, ultrasonic, infrared, and so on. The transfer distance of millimeter wave radar is far, in the transmission window, low attenuation and low penetration, can meet the requirements of the vehicle’s adaptability to all weather, and the characteristics of the millimeter wave itself determines the size of millimeter wave radar sensor device size. Small, lightweight characteristics. Very good for other sensors such as cameras, lasers, ultrasound, infrared, and use scenarios in vehicle applications. Install millimeter wave radar on the car, you can measure distance, angle, and relative speed from the thunder to the object to be measured. Adaptive Cruise Control (ACC), pre-collision alarm (FCW), blind spot detection (BSD), auxiliary parking, auxiliary variant can be achieved by millimeter-wave radar. Comparative common car millimeter wave radar operating frequency at 76GH-81GHz range.

Working principle of car millimeter waverada

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Car anti-collision radar mainly has ultrasonic radar, laser radar, millimeter wave radar. Different radar types are different, and their performance and characteristics have advantages and disadvantages, and different radars can be used to achieve different functions.

Millimeter wave radar is the main sensor of the ADAS system, millimeter wave radar frequency range 30GHz-300GHz, wavelength from 1mm-10mm, millimeter wavelength range of more than 200 meters, can have detection, ranging, speed and directional measurement . At the same time, millimeter wave radar can accurately detect objects through illumination, rainfall, dust, and big mist, etc., and work all day.

Car radar is used as the core sensor (detection distance, speed) of the driver assist system; long-distance radar (LRR) is used to achieve automatic cruise (ACC), medium-distance radar (MRR) is used to achieve side-to-vehicle alarm and lane Assisted, near-distance radar (SRR) is used to achieve parking assist, obstacles, and pedestrian testing.

The 77GHz car radar system belongs to the hotspots of major automotive companies at home and abroad, compared to the laser vehicle radar, the infrared car radar and other low frequency millimeter wave carriers, the 77GHz car radar can be used in the spectrum range wide, The information capacity is large, the resolution, Doppler frequency shift, high speed sensitivity, strong anti-interference ability, and penetration of plasma, and easy to achieve narrow beams and high gains of the antenna.

The millimeter wave band is wide, the resolution is high, and the antenna component is small, which can adapt to harsh environments. The most extensive use of the FM continuity wave (FMCW) is currently used in millimeter wave radar. Specifically, the radar continuously transmits the FMCW frequency modulation signal to measure distance, angle, and speed, which are different from the traditional pulse radar system of periodic emission short pulse, and the vehicle millimeter wave radar, usually using simple structural and simple cost, suitable for close range detection. Radar antennas outward, a series of continuous frequency modulation millimeter waves, and the frequency varies from time to time according to the regulation of the voltage, and is generally a continuous triangular wave, or a saw tooth wave.

The millimeter wave radar is transmitted through the microstrip array antenna, and the echo and emission wave received after the target reflection have a frequency difference, and the frequency difference between the transmitting and reflection signal is analyzed by the signal processor. Based on Puller principle, you can accurately measure the speed and distance of the target relative to the radar, further through multi-objective detection and tracking algorithm, multi-objective separation and tracking. Further, the body dynamic information is combined for data processing. After the judgment, the driver is warned by sound, light and tactips, or actively intervene in the car in time, reducing the chance of accidents. The working schematic is shown in Figure 1.

Figure 1 Bright block diagram of the working principle of the car millimeter wave radar

Test challenge in car millimeter wave radar

Since the vehicle radar is related to the driving safety of the driver, in order to ensure the operation of the car anti-collision radar, it is necessary to function and performance testing of millimeter wave radar. From the R & D, commissioning, optimization, production, and installation calibration of millimeter wave radar, it is necessary to standardize, standardize the detection and diagnosis of radar performance, realize the performance, echo reception performance, and immunity of millimeter radar. test.

During the development of automotive radar providers or millimeter waves, the launch system, the receiving system, radar components, chips, devices, and unit circuits are subject to test. Since 79GHz provides a super high bandwidth of 4GHz, it is a challenge to the measuring system for millimeter wavelers. Because the frequency increases, the attenuation of the signal will rise rapidly, and the reception capacity of the instrument is also proposed. High requirements. Tektronix work together to give a complete solution to the car millimeter Prada customers.

Tektrom’s millimeter wave radar signal generation and analysis plan

The automobile millimeter-wave radar transceiver system mainly includes transmitter testing, receiver performance testing, and anti-interference performance testing, the transmitter requires signal analysis equipment to assess the performance indicators of radar transmitted signals. Receiver requires signal source analog echo, from FMCW signals, to complex multi-target simulations, and interference signals, even multiple background transmitters, or more complex signals under multiple interference fields, using these complex signals to verify reception The performance of the machine. Tyk provides automotive millimeter-wave radar testing and measurement solutions that can be generated, measured, and analyzed millimeter wave radar signals, ensuring that the sensor has no fault operation to ensure safe driving.

Tekle Super Broadband Automotive millimeter wave Rada signal test scheme includes radar signal generation, radar signal analysis, and anti-interference testing, the test system includes a high performance arbitrary waveform generator AWG70000B series, built-in power-on-inverter, antenna, and built-in Inverter, high performance oscilloscope MSO64 or DPO70000 CDXSX series, real-time spectrum analyzer, and related software. AWG70000B Series Any Waveform Generator generates an FMCW radar intermediate frequency signal, through the upper frequency converter to 76GHz to 81GHz mm radar signal, the received millimeter wave radar signal changes to the intermediate frequency, then utilizes high performance oscilloscope MSO64 or DPO70000 CDXSX series acquisition Radar intermediate frequency signal, finally analyzed broadband radar signals using FMCW radar signal analysis software, and the real-time spectrum analyzer RSA5126B can be verified and tested using real-time spectrum analyzer RSA5126B for radio frequency performance index. And AWG70000B can achieve the closed loop amplitude of the entire system with high performance oscilloscopes and phase calibration and waveform predistortion, and AWG can also play back the waveform data acquired by high performance oscilloscope.

Figure 2 Tektronix Millimeter Poe Rada Signal Test Block Diagram

Test scheme 1: Radar receiver performance test

Radar receiving end test mainly evaluates the performance indicators of the receiver, to verify the performance indicators of the radar receiver, require millimeter wave radar signals to test the detection performance of the car radar receiver. Tektric car millimeter wave radar signal simulation system consists of high performance arbitrary waveform generator AWG70000B series, built-in power-inverter, and radar signal generation software, see Figure 3. AWG can be easily generated from generating FMCW radar signals, to complex multi-objective simulation, and interfering signals, even multiple background transmitters, or more complex signals under multiple interference fields.

Tektric radar signal generating system is based on the AWG of Tektronix, the upper frequency converter, and the antenna are hardware foundation, and the radar signal generating software forms a function of powerful millimeter wave radar signal simulation system.

Figure 3 Ultra-wideband millimeter wave radar signal generation

The AWG70000B series high performance arbitrary signal generator can generate in the frequency coverage of DC ~ 20GHz, calibrate 20 GHz instantaneous bandwidth vector signals, with unparalleled sampling rates, bandwidth, and signal fidelity, combined with SourceXpress signal advanced RF / IF / IQ waveform generation and editing software can easily generate radar test signals such as FMCW, PULSE.

技术文章—泰克汽车毫米波雷达测试解决方案

For automotive millimeter wave radar, the frequency is in the range of 76 81GHz, the carrier frequency is greater than 20 GHz broadband radar signal generation, and the upper frequency converter of Tektronix’s arbitrary wave generator AWG70000B and third-party NDK can be covered at frequencies of 76 GHz ~ 81GHz. Internal generation, calibrating the vector signal of the 4GHz instantaneous bandwidth, the upper inverter internal vibration, does not require external external local vibration, which can meet the 76 GHz to 81 GHz frequency range 4GHz bandwidth test car millimeter wave radar signal requirements, and can simulate Various radar signals for a wide range of automotive radar tests.

Figure 4 AWG + upper frequency converter to 76GHz81GHz program

Test Scheme 2: Anti-interference performance test

Millimeter wave radar anti-interference testing requires a single sound signal, intermodulation interference, and multi-radar signals, and requires various interference signals in a complex environment to verify the anti-interference ability of the radar.

Tektronix AWG70000B series cooperates with complex electromagnetic environment signals in SourceXpress generating plugins, generating radar signals in complex electromagnetic environments, simulating more complex test scenarios, can use arbitrary waveforms as background transmitters to simulate today’s complex electromagnetic environments to achieve multi-radar target Important means of signal simulation, interference signal simulation, communication signal simulation, complex electromagnetic environment simulation, etc., providing a powerful tool for receiver anti-interference capabilities, verifying the anti-interference ability of the automobile radar receiver.

The complex electromagnetic environment insert in the Teke AWG can simulate potential interference in the terrestrial communication signal, which can simulate various interference signals such as interference between the vehicle millimeter – wave radar.

Figure 5 complex electromagnetic environment signal and interference signal signal generation

In the radar signal library, you can actually include several radar signals, and each radar signal can set its own radar parameters, or if the radar signal is at the same time. So in a signal type can include countless identical signals, and simulate the true state of complex electromagnetic environments. The software can simulate a variety of complex signals, which can fully meet the current simulation requirements of automotive radar signals in complex electromagnetic environments.

Test Scheme 3: Transmitter Test

The transmitter of the car radar system is tested, and the radar signals emitted by the radar sender are analyzed to test the key parameters of the radar signal. Tektric radar transmitter test scheme with high performance real-time oscilloscope, real-time spectrum analyzer, built-in inverter and antenna as hardware foundation, combined with FMCW signal analysis software to form a function of strong ultra-wideband millimeter wave radar transmitter signal acquisition and analysis plan.

Figure 6 Signal acquisition and analysis of ultra-wideband millimeter wave radar

The Tektron’s radar analysis solution provides a unique, designed for the 76GHz-81GHz band to optimize the built-in-in-vibrator, and the output signal ranges from 2GHz ~ 7GHz intermediate frequency radar signal is collected by real-time oscilloscope, and then use FMCW analysis software to carry out Accurate time domain and modulation domain analysis, for RF indicators through real-time spectrum analyzer test, achieving excellent automotive radar analysis solutions, greatly enhances the performance of analytical solutions.

Figure 7 Califier + real-time oscilloscope / real-time spectrum analyzer 76GHz – 81GHz radar signal

技术文章—泰克汽车毫米波雷达测试解决方案

Figure 8 millimeter wave radar signal analysis software

Summarize

Teky 7681GHz frequency car millimeter Prada test solution provides efficient and powerful hardware experiments and verification capabilities for automotive radar systems, and accelerates research on automotive radar systems. Teky’s ultra-wideband millimeter wavelet signal test solution realizes its unique performance and enrichment, and simple and easy-to-use radar signal generating software and FMCW radar signal analysis software perfectly realizes simulation and analysis of radar signals. It greatly improved the work efficiency of engineers.

技术文章—泰克汽车毫米波雷达测试解决方案

技术文章—泰克汽车毫米波雷达测试解决方案

技术文章—泰克汽车毫米波雷达测试解决方案

技术文章—泰克汽车毫米波雷达测试解决方案

技术文章—泰克汽车毫米波雷达测试解决方案