高度精确的汽车雷达传感器的供应商如何在竞争对手迅速模仿好主意的市场中保持榜首？当然，通过变得更好。
In the case of radar, that translates to boosting the ability to respond to hazards. Specifically, it means classifying obstacles and accurately judging their distance, angle, and velocity in any weather or lighting conditions and producing precise, detailed images of the surroundings.
In the past, radar-based solutions were large, expensive, power-hungry, and designed to detect big objects like planes or tanks—not individual pedestrians. They also operated at low frequencies, which results in much less precise imaging.
mmwave Radar的出现
为了解决这些问题，德州仪器开发了毫米波（MMWAVE）雷达传感器，该传感器利用在60/77-GHz频率下运行的短波长度电磁波以更高的精度。它们也很小，紧凑，大约是硬币的大小。而且他们的决议不仅检测到障碍物的存在，而且还认识到汽车和行人之间的差异，还符合单个芯片上最新的汽车安全标准。
放置在汽车保险杠后面，也许代替了日期的24-GHz雷达传感器，mmWave radar can more easily see an obstruction on the road to alert the driver。It measures the range, velocity, angle, and elevation of an object from which its mmWave pulse is reflected. In addition, mmWave sensors differentiate themselves from traditional solutions by enabling flexibility and programmability in the RF front-end and the MCU/DSP processing back end.
Designers can use the TI mmWave system to address advanced driver-assistance systems (ADAS) and autonomous-driving safety regulations—including ISO 26262, which enables Automotive Safety Integrity Level (ASIL)-B.
Meeting NCAP Standards
对于自动停车和驾驶，能够使用新的AWR2944传感器等设备看到更远的设备，然后无缝处理与Jacinto处理器一起数据，以提高意识和安全性，并满足新汽车评估计划（NCAP）的要求，并满足新车评估计划（NCAP）的要求，该计划的要求要求更好地探测行人。
NCAP is the U.S. government’s premier consumer information program for evaluating vehicle safety, providing an objective rating on a five-star scale. NCAP standards vary by region; in the U.S., NCAP is governed by the National Highway and Traffic Safety Administration (NHTSA).
同样，根据安全功能分配明星的欧洲新汽车评估计划（Euro NCAP）将在2023年介绍其最严格的安全协议。全球汽车行业。例如，其第79号法规指定了盲点检测和车道变换辅助中雷达的最小距离和操作速度。
Euro NCAP最近更新了他们的雷达标准to improve driver-assistance features in new cars。With longer-range, higher-resolution radar, cars can sense oncoming vehicles faster with detection at farther distances to enable safe lane changes and intersection navigation.
当今车辆中的雷达传感器涵盖了前，后和角雷达。NCAP的角落雷达法规旨在使更换车道更安全。安全的车道更换操作是车辆有足够时间做出反应以确保两辆车之间的安全驾驶距离的操作。
借助后角传感器，可以获取接近车辆的距离和速度并使用第一辆车辆的已知速度，因此可以计算车道变更开始时所需的临界距离。
根据TI的说法，AWR2944是第一个使汽车制造商满足新安全要求的单芯片角雷达传感器。
A Closer Look
在仔细检查AWR2944单芯片MMWave传感器后，它尤其是为汽车空间中的低功率，自我监控，超准确的雷达系统而构建的。高级角雷达的性能以及一流的RF性能由第四个发射器启用，比传统的三个发射器设备的角度分辨率高33％。
此外，新传感器的硬件得到了多普勒 - 划分多元访问（DDMA）信号处理的支持，以提高其在更远的距离内距离40％的距离内迎面车辆的能力。
AWR2944 MMWAVE RADAR由Ti的低功率，45 nm的RFCMOS工艺建造，集成了PLL，VCO，Mixer和基带模数转换器（ADC）。同样值得关注的是Ti的C66X数字信号处理器（DSP），用于集成在DSP子系统中的雷达信号处理。在主要子系统中，该设备实现了用户可编程的ARM R5F，从而允许自定义控制和汽车接口应用程序。
Additionally, the part is provided as a complete platform solution including TI hardware and software reference designs, software drivers, sample configurations, API guides, and user documentation.
For optimal performance, engineers could consider the low-noise PMIC specifically designed to power the AWR2944. TI’s LP87745-Q1 integrates three step-down buck converters, a 5-V boost converter, and a 1.8-V/3.3-V LDO into a single IC. It can reduce power-supply solution cost and cut PCB area by more than 50%, as well as improve low-frequency noise tenfold compared to existing solutions, according to TI.
Safety Inside and Outside
现在，由于汽车内部的安全性，MMWave传感器现在可以用来提醒父母关于后座的孩子。在该系统中，波形从车辆的天花板传输到停放的汽车的机舱。
如果一个婴儿或幼儿是在车里,waveform would bounce off their chest, and the technology would detect their breathing and communicate to the central processor to alert the driver, honk the horn, or open the windows to allow air to come in. Just one radar-on-chip can support child presence detection, remind passengers to put on their seatbelts, monitor the driver’s alertness and vital signs, and enable interaction with in-vehicle systems using only hand gestures.
Dana (Dan) Wang, R&D Manager at Texas Instruments, explains how TI mmWave radar can help create a safer world in her“Vision: Possible” blog post。她说：“通过使用CMOS技术，我们大大提高了雷达传感器的集成水平，并大大降低了成本。”她补充说：“我认为MMWave具有提高工厂，建筑物，家庭和我们日常生活中的工厂安全性的巨大潜力。这仅仅是个开始。”
Regardless of the simplicity or complexity of the application, mmWave radar solutions are readily available for new and existing industrial and automotive designs. Where to begin? Engineers can jump-start their designs by obtaining the AWR2944 evaluation module (AWR2944EVM).
