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1. 发明申请

US20040130482A1 Digital controlled linear sweep frequency mode for FMCW radar altimeter 审中-公开
标题翻译： FMCW雷达高度计的数字控制线性扫频模式
公开(公告)号：US20040130482A1
公开(公告)日：2004-07-08
申请号：US10334719
申请日：2003-01-02
发明人： Yu-Shan Lin , Feng-Ling Liu , Shih-Tung Cheng
IPC分类号： G01S013/32
CPC分类号： G01S7/023 , G01S7/35 , G01S13/345 , G01S13/347 , G01S13/882
摘要： This invention relates to a frequency modulation of continuous wave (nullFMCWnull) radar altimeter capable of controlled linear sweep modes. The FMCW radar altimeter is characterized by the following functions: (1) adopts sweep up frequency and sweep down frequency to solve problems of distance and doppler signal mixture; (2) injects a random generated variable time delay in between sweep intervals to overcome interferences among different altimeters; and (3) switches different sweep frequency bands in accordance with different altitudes.
摘要翻译：本发明涉及能够控制线性扫描模式的连续波（“FMCW”）雷达高度计的频率调制。 FMCW雷达高度计具有以下功能：（1）采用扫频和扫频，解决距离和多普勒信号混合问题; （2）在扫描间隔之间注入随机产生的可变时间延迟，以克服不同高度计之间的干扰; 和（3）根据不同的高度切换不同的扫频带。

2. 发明申请

US20020113730A1 COMPLEX HOMODYNED FSK DIPLEX RADAR 有权
标题翻译：复合HOMODYNED FSK DIPLEX雷达
公开(公告)号：US20020113730A1
公开(公告)日：2002-08-22
申请号：US09785843
申请日：2001-02-16
申请人： Eaton-Vorad Technologies, Inc.
发明人： Prescott A. Walmsley
IPC分类号： G01S013/32
CPC分类号： G01S13/325 , G01S13/38 , G01S13/584
摘要： A complex frequency shift keyed homodyned diplexed radar system and method that can accurately determine the range of one or more targets where the targets have little or no velocity relative to the radar system. The system and method generates a FSK electromagnetic wave that is reflected off the one or more targets and converted into a delayed or phase shifted baseband signal and undelayed baseband signal where the delayed and an undelayed baseband signal may be analyzed to determine the range of the one or more targets.
摘要翻译：一种复杂的频移键控同步双工雷达系统和方法，可以准确地确定目标相对于雷达系统的速度很小或没有速度的一个或多个目标的范围。该系统和方法产生从一个或多个目标反射的FSK电磁波，并将其转换为延迟或相移基带信号和未延时的基带信号，其中可分析延迟和未延迟的基带信号，以确定一个或更多目标。

3. 发明申请

US20010035839A1 FM-CW radar equipment 有权
标题翻译： FM-CW雷达设备
公开(公告)号：US20010035839A1
公开(公告)日：2001-11-01
申请号：US09754776
申请日：2001-01-04
申请人： Fujitsu Limited/ Fujitsu Ten Limited
发明人： Hideki Shiratori , Naoki Motoni
IPC分类号： G01S007/40 , G01S013/32 , G01S013/93
CPC分类号： G01S7/40 , G01S13/34
摘要： FM-CW radar equipment to solve a conventional problem of failure detection caused by the carrier level of amplitude modulation dispersing too largely to adjust to a constant level within a criterion range. A novel method is applied based on that a noise level greatly varies on occurrence of a failure in radio-frequency circuit. A failure can be detected by comparing the varied noise level with a noise level in normal condition. Using this method, FM-CW radar equipment can be configured with a simple structure for detecting a failure in transmission/reception circuit. The equipment provides with a noise-level extraction circuit in radio-frequency circuit, and a comparator for comparing an output of the noise-level extraction circuit with a predetermined criterion value. An alarm is output when the comparator detects the output of the noise-level extraction circuit decreases to less than the predetermined criterion value.
摘要翻译： FM-CW雷达设备解决了传统的故障检测问题，由载波电平引起的幅度调制分散太大，无法在标准范围内调整为恒定电平。基于射频电路故障发生时噪声水平变化很大的应用了一种新颖的方法。通过将变化的噪声电平与正常条件下的噪声电平进行比较可以检测到故障。使用这种方法，FM-CW雷达设备可以配置简单的结构，用于检测发射/接收电路故障。该设备在射频电路中提供噪声电平提取电路，以及用于将噪声电平提取电路的输出与预定标准值进行比较的比较器。当比较器检测到噪声电平提取电路的输出降低到小于预定标准值时，输出报警。

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