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1. 发明授权

US11835637B2 Method for radio direction finding, direction finding system as well as platform 有权
公开(公告)号：US11835637B2
公开(公告)日：2023-12-05
申请号：US16680253
申请日：2019-11-11
申请人： Rohde & Schwarz GmbH & Co. KG
发明人： Andreas Baumeister
IPC分类号： G01S3/10 , G01S3/04
CPC分类号： G01S3/10 , G01S3/046
摘要： A method for radio direction finding using a direction finding system having an antenna, a magnetic field sensor and a control unit, the method comprising: receiving a radio frequency signal of at least one emitter via the antenna by the control unit obtaining a received signal; receiving a magnetic measurement value of the magnetic field at the direction finding system via the magnetic field sensor; correcting the magnetic measurement value obtaining a corrected magnetic measurement value; correcting the received signal obtaining a corrected signal; and determining the precise bearing of the emitter based on the corrected received signal and the corrected magnetic measurement value. Further, a direction finding system and a platform are disclosed.

2. 发明申请

US20210258042A1 COMMUNICATION DEVICE, INFORMATION PROCESSING METHOD, AND STORAGE MEDIUM 有权
公开(公告)号：US20210258042A1
公开(公告)日：2021-08-19
申请号：US17152889
申请日：2021-01-20
申请人： KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
发明人： Yoshiki OISHI , Satoshi MORI , Kenichi KOGA , Tatsuya KOIKE
IPC分类号： H04B1/7163 , G01S3/48 , G01S3/10
摘要： A communication device includes: a plurality of wireless communication sections, each of which is configured to wirelessly receive a signal from another communication device; and a control section configured to perform a detection process of detecting specific elements with regard to a plurality of correlation computation results, each of which is obtained by correlating a first signal that is transmitted from the other communication device and each of second signals at the designated interval and includes a correlation value indicating magnitude of correlation between the first signal and the second signal as an element obtained at the designated interval, and control a change process of treating a wireless communication section having earliest time corresponding to the specific element as a first wireless communication section among the plurality of wireless communication sections, treating the other wireless communication section as a second wireless communication section among the plurality of wireless communication sections.

3. 发明授权

US09170316B2 Systems and methods for improving bearing availability and accuracy for a tracking filter 有权
标题翻译：用于提高跟踪过滤器的轴承可用性和精度的系统和方法
公开(公告)号：US09170316B2
公开(公告)日：2015-10-27
申请号：US13661064
申请日：2012-10-26
申请人： Ruy C. Brandao , Eduard Shestak , Ian Dougherty
发明人： Ruy C. Brandao , Eduard Shestak , Ian Dougherty
IPC分类号： G01S1/00 , G01S1/04 , G01S3/02 , G01S3/46 , G01S13/93 , G01S3/10
CPC分类号： G01S1/04 , G01S3/023 , G01S3/10 , G01S3/46 , G01S13/9303
摘要： Systems and methods for improving bearing availability and accuracy in a traffic collision-avoidance system (TCAS). In an exemplary method, if only a single phase-difference value is received for one of two two-element antennas, a processor determines an expected maximum antenna element phase-difference value for the elements of the two-element antenna that did not receive a phase-difference value for a target signal source; estimates a phase-difference value for the two-element antenna that did not include a phase-difference value, based on the expected maximum antenna element phase-difference value and a previously determined predicted bearing value; and calculates bearing based on the estimated phase-difference value and a phase-difference value received from the other two-element antenna. The determination is based on previously received signals associated with the target signal source and based on elevation information of the target signal source and a predefined maximum antenna element phase-difference value for the respective antenna element pair. An output device outputs information associated with the calculated bearing.
摘要翻译：提高交通防撞系统（TCAS）的轴承可用性和准确性的系统和方法。在示例性方法中，如果仅接收到两个双元素天线中的一个的单个相位差值，则处理器确定未接收到的单元天线的元件的预期最大天线元相位差值目标信号源的相位差; 基于预期的最大天线元相位差值和预先确定的预测方位值，估计不包括相位差值的双元素天线的相位差值; 并根据估计的相位差值和从另一个双元件天线接收的相位差值来计算轴承。该确定基于与目标信号源相关联的先前接收到的信号，并且基于目标信号源的仰角信息和相应天线元件对的预定义的最大天线元相位差值。输出设备输出与计算出的轴承相关的信息。

4. 发明授权

US07652623B2 Null-fill antenna, omni antenna, and radio communication equipment 有权
标题翻译：空填天线，全向天线和无线电通信设备
公开(公告)号：US07652623B2
公开(公告)日：2010-01-26
申请号：US11178948
申请日：2005-07-12
申请人： Norihiko Oomuro
发明人： Norihiko Oomuro
IPC分类号： H01Q3/00 , G01S3/10
CPC分类号： H01Q21/293 , H01Q1/246 , H01Q21/22
摘要： A wide-angle null-fill antenna with no null in the depression angle range, an omni antenna using the same, and radio communication equipment. A null-fill antenna comprises a first antenna array including antenna elements arranged with a prescribed point as the center, and a second antenna array having amplitude characteristics substantially equal to those of the antenna elements forming the first antenna array. The first antenna array is excited so that the excitation amplitude distribution is to have symmetry with respect to the prescribed point, while the excitation phase distribution is to have point symmetry with respect to the prescribed point. The phase center of the first antenna array is substantially coincident with that of the second antenna array.
摘要翻译：在俯角范围内无空的广角零点填充天线，使用其的全向天线和无线电通信设备。零填充天线包括第一天线阵列，其包括以规定点为中心布置的天线元件，以及具有与形成第一天线阵列的天线元件的振幅特性基本相等的振幅特性的第二天线阵列。第一天线阵列被激励，使得激励振幅分布相对于规定点具有对称性，而激发相位分布相对于规定点具有点对称性。第一天线阵列的相位中心与第二天线阵列的相位中心基本一致。

5. 发明授权

US5712867A Two-way paging apparatus having highly accurate frequency hopping synchronization 失效
标题翻译：具有高精度跳频同步的双向寻呼装置
公开(公告)号：US5712867A
公开(公告)日：1998-01-27
申请号：US398372
申请日：1995-03-03
申请人： Hanoch Yokev , Yehouda Meiman , Shimon Peleg , Oren Yokev , Boaz Porat
发明人： Hanoch Yokev , Yehouda Meiman , Shimon Peleg , Oren Yokev , Boaz Porat
IPC分类号： G01S1/00 , G01S1/02 , G01S3/02 , G01S3/04 , G01S3/10 , G01S5/00 , G01S5/02 , G01S5/04 , G01S19/48 , G04G7/00 , H04B1/713 , H04B1/7156 , H04B7/26 , H04W64/00 , H04W88/02 , H04W88/18 , H04K1/04 , H04J3/06 , H04L7/027
CPC分类号： G01S1/026 , G01S3/023 , G01S3/043 , G01S3/10 , G01S5/0009 , G01S5/021 , G01S5/04 , G04G7/00 , H04B1/713 , H04B1/7156 , H04B7/2681 , H04B7/2693 , H04W64/00 , H04W88/022
摘要： A method, apparatus and system is described for distributing accurate time-of-day information from an existing telecommunications infrastructure without modifying the existing infrastructure. In particular, the system comprises a base station device which continually receives extremely accurate time-of-day information from, by way of example and not by limitation, a GPS (Global Positioning Satellite) system, a local atomic dock, or a wired or wireless time standard. The base station periodically places time-of-day information into standard paging packets for transmission over a standard paging network. The paging packets are sent over telephone lines to the paging terminal for transmission whenever a time slot for transmission becomes available. The base station device records the actual time of transmission of the paging packet containing the time of day information and prepares the next time-of-day packet by placing the exact transmission time of the previous time-of-day packet sent. In the receiver, an algorithm is used to extrapolate the current time-of-day based on the history of transmitted packets containing measured time-of-day information of past transmissions.
摘要翻译：描述了一种方法，装置和系统，用于从现有电信基础设施分发准确的时间信息，而不修改现有的基础设施。特别地，该系统包括基站设备，其通过示例而不是限制的方式从GPS（全球定位卫星）系统，本地原子码头或有线或无线时间标准。基站周期性地将时间信息放置在标准寻呼分组中，以便通过标准寻呼网络传输。每当传输时隙变得可用时，寻呼分组通过电话线路发送到寻呼终端进行传输。基站装置记录包含时间信息的寻呼分组的实际发送时间，并且通过放置发送的前一时间分组的精确发送时间来准备下一个时间分组。在接收机中，使用一种算法来基于包含过去传输的测量时间信息的传输分组的历史来推断当前时刻。

6. 发明授权

US5499266A Low-power frequency-hopped spread spectrum acknowledgement paging system 失效
标题翻译：低功率跳频扩频确认寻呼系统
公开(公告)号：US5499266A
公开(公告)日：1996-03-12
申请号：US362794
申请日：1994-12-22
申请人： Hanoch Yokev , Haim Harel , Yehouda Meiman
发明人： Hanoch Yokev , Haim Harel , Yehouda Meiman
IPC分类号： G01S1/02 , G01S3/02 , G01S3/04 , G01S3/10 , G01S5/00 , G01S5/02 , G01S5/04 , G01S19/25 , G01S19/27 , H04B1/713 , H04B1/7156 , H04B7/26 , H04W64/00 , H04W84/02 , H04W88/02
CPC分类号： H04W64/00 , G01S1/026 , G01S3/023 , G01S3/043 , G01S3/10 , G01S5/0009 , G01S5/021 , G01S5/04 , H04B1/713 , H04B1/7156 , H04B7/2681 , H04B7/2693 , H04L5/0053 , H04W84/025 , H04L5/0007 , H04L5/0062 , H04L5/0091 , H04W88/022
摘要： An acknowledgement paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgement paging over long distances. The acknowledgement paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area. The pagers include a special double loop PLL synthesizer to produce an accurate narrow band frequency and to change or hop frequencies in a rapid fashion. The base receiving unit employs special algorithms for retrieving very low power acknowledgement paging messages in a noisy environment by using data redundancy, data interleaving, soft decoding and error correction codes to strip the bi-phase-modulated, frequency-hopped spread-spectrum digital data transmitted from the remote pocket pagers. A history of the frequency and phase drift is used during reception of the acknowledgement messages to predict the phase and frequency drift of the encoded digital information to further reduce decoding error. Signal to noise ratios are determined for each frequency hop and relatively noisy hops are discarded or minimized in a soft decoding process based redundancy of data bits.
摘要翻译：描述了一种确认寻呼系统，其适合于寻呼网络的现有基础设施，并且在远距离执行确认寻呼的同时提供低成本的制造和低功率操作。确认寻呼系统由标准寻呼发射机和使用跳频扩频差分双相移键控通信响应寻呼的多个远程寻呼单元组成。多个寻呼机被分配给组，其中每个组被分配在确定跳频的公共重复伪随机噪声码中的单独的起始位置。寻呼机的分组使组之间的确认传输的冲突最小化，并且使得大量寻呼单元能够在单个地理区域内操作。寻呼机包括一个特殊的双回路PLL合成器，以产生精确的窄带频率，并以快速方式改变或跳频。基站接收单元采用特殊算法，通过使用数据冗余，数据交织，软解码和纠错码来消除双相调制的跳频扩频数字数据，在噪声环境中检索极低功率的确认寻呼消息从远程口袋传呼机传输。在接收确认消息期间使用频率和相位漂移的历史来预测编码的数字信息的相位和频率漂移以进一步减少解码错误。针对每个跳频确定信噪比，并且在基于软解码过程的数据比特冗余中丢弃或最小化相对噪声的跳。

7. 发明授权

US3778830A Vibration compensation for range direction finder 失效
标题翻译：用于范围方向探测器的振动补偿
公开(公告)号：US3778830A
公开(公告)日：1973-12-11
申请号：US3778830D
申请日：1972-08-24
申请人： US NAVY
发明人： JOSEPH H
IPC分类号： G01S7/40 , G01S3/10 , G01S9/02
CPC分类号： G01S7/40
摘要： Apparatus for compensating signal direction of arrival measurements used for direction finding and ranging for phase errors generated by changes in the relative positions of receiving antennas due to vibration or structural weaving. The apparatus can be used to advantage in monopulse radar systems wherein the relative phase between the signals induced in separated antennas is used to deduce target position. Local oscillator power and, when required, auxiliary signals are electromagnetically coupled to at least two identical receivers over portions of incoming signal path to produce a unique error signal. Auxiliary signals are coupled if vibrations are not symmetrical or are not sufficiently in synchronism. The auxiliary signals are coupled during ''''quiet'''' intervals when no received signals are present to provide reference signals over the same portions of incoming signal path.
摘要翻译：用于补偿信号到达方向测量的装置，用于通过由于振动或结构编织而导致的接收天线的相对位置变化而产生的相位误差的测向和测距。该装置可以用于单脉冲雷达系统中，其中使用分离的天线中感应的信号之间的相对相位来推导目标位置。本地振荡器功率，当需要时，辅助信号通过输入信号路径的部分与至少两个相同的接收机进行电磁耦合，以产生唯一的误差信号。如果振动不对称或不能充分同步，则辅助信号耦合。辅助信号在没有接收到信号的情况下在“安静”间隔期间耦合，以在输入信号路径的相同部分上提供参考信号。

8. 发明授权

US3725935A Leading edge discriminator circuit 失效
标题翻译：领先的边缘辨识器电路
公开(公告)号：US3725935A
公开(公告)日：1973-04-03
申请号：US3725935D
申请日：1967-03-29
申请人： US NAVY
发明人： ALPERS F
IPC分类号： F41G7/22 , G01S3/10
CPC分类号： F41G7/22
摘要： An apparatus for use in the guidance systems of anti-radar missiles to provide discrimination against echo signals when the target is a pulsed radar. It consists of circuits that permit only the leading portion of the first pulse received in each radar cycle to reach the seeker direction sensing circuits.
摘要翻译：一种用于反雷达导弹引导系统的装置，当目标是脉冲雷达时，提供对回波信号的辨别。它包括仅允许在每个雷达周期中接收的第一脉冲的前导部分到达探测器方向感测电路的电路。

9. 发明授权

US2256472A Radio direction finder deviation correction device 失效
标题翻译：无线电测向仪偏差校正装置
公开(公告)号：US2256472A
公开(公告)日：1941-09-23
申请号：US30040439
申请日：1939-10-20
申请人： CORY ABRAM A
发明人： CORY ABRAM A
IPC分类号： G01S3/10
CPC分类号： G01S3/10

10. 发明授权

US1368657A Wireless direction-finder 失效
标题翻译：无线测向仪
公开(公告)号：US1368657A
公开(公告)日：1921-02-15
申请号：US41002420
申请日：1920-09-13
申请人： RCA CORP
发明人： JOSEPH ROUND HENRY
IPC分类号： G01S3/10
CPC分类号： G01S3/10

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