本文件适用于SRR领域的短程设备（SRD），该设备以非常低的功率水平运行，用于 用于车辆环境传感的外部汽车应用。这些应用需要天线特性，这就需要窄波束和低仰角天线 安装高度有限。本文件描述了SRR的技术特征，以及作为宽带的射频要求 频率范围，适用于CEPT/ERC中规定的在24 GHz SRD中工作的载波频率 建议70-03[1]。这些设备还使用SRD频带作为运动传感器功能，实现 目标速度测量功能的多普勒模式。EN 301 091[3]为新的成本效益高、用途广泛的24 GHz雷达技术奠定了基础，该技术 补充77 GHz汽车巡航控制（ACC）功能。附件A:详细市场信息；附件B:技术信息； 附件C:预期的兼容性问题。

The present document applies to Short Range Devices (SRD) in the field of SRR operating at very low power levels for exterior automotive applications for vehicle environmental sensing.These applications require antenna characteristics, which necessitate narrow beam and low elevation antenna angles with a limited mounting height.The present document describes the technical characteristics of SRRs, the Radio frequency requirements as a wideband frequency range, for the carrier frequency operating in the 24 GHz SRD as specified in CEPT/ERC Recommendation 70-03 [1]. The devices also use the SRD Band for a movement sensor function implementing a Doppler mode for a target speed measurement function.The EN 301 091 [3] presents a basis for the new cost efficient and versatile 24 GHz radar technology, which complements 77 GHz Automotive Cruise Control (ACC) functions.The following information is given in:Annex A: Detailed market information;Annex B: Technical information;Annex C: Expected compatibility issues.