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31.发明授权Arrangement to provide an accurate time-of-arrival indication for a plurality of received signals 失效为多个接收信号提供准确的到达时间指示的布置
公开(公告)号：US4559607A
公开(公告)日：1985-12-17
申请号：US512810
申请日：1983-07-11
Applicant: Ning H. Lu
Inventor： Ning H. Lu
Abstract: The arrangement comprises N signal channels each responsive to a different one of N signals where N is an integer greater than one. Each of the N signal channels includes a sampling circuit to sample the associated one of the N signals by a different one of N phase clocks with each of the N phase clocks sampling a different one of the N signals at a predetermined different time uniformly spaced over a given time interval. A delay means is coupled to each of the sampling circuits to time align the outputs of each of the sampling circuits so that all sampled signal pulses are time shifted consistent with the associated sampling clock phases. A correlator is coupled to the output of each of the delay means to correlate the samples of the N signals with a reference signal. The output of the correlators are integrated to provide the indication of the time of arrival of the N signals.
Abstract translation: 该装置包括N个信号信道，每个信号信道响应于N个信号中的不同的一个，其中N是大于1的整数。 N个信号通道中的每一个包括采样电路，以通过N个相位时钟中的不同的N个时钟采样N个信号中的相关一个信号，其中N个相位时钟中的每一个以均匀间隔的预定不同时间对N个信号中的不同的一个进行采样 给定的时间间隔。 延迟装置耦合到每个采样电路以对每个采样电路的输出进行时间对准，使得所有采样的信号脉冲都与相关的采样时钟相位一致。 相关器耦合到每个延迟装置的输出，以将N个信号的样本与参考信号相关。 相关器的输出被集成以提供N个信号的到达时间的指示。
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公开(公告)号：US4500886A
公开(公告)日：1985-02-19
申请号：US455674
申请日：1965-05-11
Applicant: Henry Naubereit , Thomas F. Long , Salvatore R. Picard , Joseph Ritz
Inventor： Henry Naubereit , Thomas F. Long , Salvatore R. Picard , Joseph Ritz
CPC classification number: G01S11/08
Abstract: A data link for an automatic aircraft carrier landing system is described which an aircraft is guided to the carrier by pitch and bank information from the carrier so as to indicate to the pilot of the aircraft whether he is within a prescribed flight path for landing or whether he should be waved off for another approach. The information transmitted from the carrier is received by a microelectronic data link receiver having an internal clock which is synchronized with the incoming information to determine if that particular aircraft is being addressed and if so, what the nature of this information is so that it may be stored and presented to the pilot at a later time for appropriate action.
Abstract translation: 描述了一种用于自动航空母舰着陆系统的数据链路，其中飞行器通过来自承运人的俯仰和银行信息被引导到承运人，以便向飞行员的飞行员指示他是否在用于着陆的规定飞行路径内， 他是否应该为了另一种做法而挥之不去。 从载波发送的信息由具有与传入信息同步的内部时钟的微电子数据链路接收机接收，以确定该特定飞机是否被寻址，如果是，则该信息的性质是如此 存储并在稍后的时间提交给飞行员进行适当的行动。
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公开(公告)号：US4095226A
公开(公告)日：1978-06-13
申请号：US660656
申请日：1976-02-23
Applicant: Dale L. Kratzer
Inventor： Dale L. Kratzer
Abstract: A digital communication system for the transmission of digital data with a modulated carrier uses a modulation locked loop and pseudo-random code to develop synchronization signals for the digital data signals and to ensure a high level of communication reliability.
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公开(公告)号：US3993997A
公开(公告)日：1976-11-23
申请号：US209322
申请日：1971-12-17
Applicant: Homer E. Jackson
Inventor： Homer E. Jackson
CPC classification number: G08G5/0008 , G01S11/08 , G01S11/10 , G08G5/0052
Abstract: An aircraft collision avoidance system and method involves transmitting a stable reference frequency from a synchronous satellite to aircraft in a region being monitored. Each aircraft in the region receives the reference frequency and transmits a carrier, modulated with the received reference frequency, to other aircraft in a collision avoidance zone. At the other aircraft, an indication of impending collision is provided by measuring the rate of change of the carrier Doppler frequency shift received thereby from the first named aircraft. Sync pulses periodically modulate the reference frequency transmitted from the satellite for aircraft ranging and data control purposes. To limit the collision warning zone relative to each aircraft, the receiver thereof is deactivated at a predetermined time after each sync pulse is received from the satellite.
Abstract translation: 飞机防撞系统和方法包括将一个稳定的参考频率从一个同步卫星传输到被监测区域的飞机。 该区域中的每架飞机接收参考频率，并将接收到的参考频率调制的载波发送到避碰区的其他飞机。 在另一架飞机上，通过测量从第一名飞行器接收的载波多普勒频移的变化率来提供即将发生的碰撞的指示。 同步脉冲周期性调制从卫星发送的参考频率用于飞机测距和数据控制目的。 为了相对于每个飞机限制碰撞警告区，在从卫星接收到每个同步脉冲之后的预定时间，其接收器被去激活。
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公开(公告)号：US3988734A
公开(公告)日：1976-10-26
申请号：US449453
申请日：1974-03-08
Applicant: Albert A. Elwood
Inventor： Albert A. Elwood
Abstract: A method of and system for locating a position in which a plurality of frequency standard devices are synchronized or phase compared at the same initial location. Two of three frequency standard devices, in a two-dimensional embodiment, are placed at transmitting stations on a known baseline. The third device is at a (third) receiving station, which receives signals from the two transmitting stations. At each transmitting station, means are provided for producing and transmitting a different radio frequency carrier signal of fixed frequency and of fixed phase, phase modulated by a periodic modulating signal in the form of a time signal produced under the control of its frequency standard device. At the receiving station, means are provided for producing a reference signal corresponding to the periodic modulating signals and two radio frequency signals related in frequency, to the radio frequency carrier signals transmitted. The time reference signal is compared at the receiving station with the periodic modulating signals recovered from the radio frequency carriers to determine respective time differences representing coarse position data. The phase relationships between each of the received radio frequency carrier signals or of signals derived therefrom by mixer means and respective ones of the two radio frequency signals produced at the receiving station are determined, representing fine position data. Methods and systems for locating a position in three dimensions are also described. The fine ranges, distances within given lanes, are respectively added by a computer or an internal computing circuit to respective coarse ranges, each of which represents the total number of lanes to the full lane closest to respective ones of the transmitting stations, the totals being the distances between the receiving station and each of the transmitting stations.
Abstract translation: 一种用于定位多个频率标准设备在同一初始位置同步或相位比较的位置的方法和系统。 在二维实施例中，三个频率标准设备中的两个被放置在已知基线上的发射站处。 第三设备在（第三）接收站，其接收来自两个发射站的信号。 在每个发送站处，提供用于产生和发送固定频率和固定相位的不同射频载波信号的装置，该信号由在其频率标准装置的控制下产生的时间信号的形式的周期性调制信号进行相位调制。 在接收站，提供了用于产生对应于频率相关的周期性调制信号和两个射频信号的参考信号到发送的射频载波信号的装置。 在接收站将时间参考信号与从射频载波恢复的周期性调制信号进行比较，以确定代表粗略位置数据的各个时间差。 确定接收的射频载波信号中的每一个或由混频器装置导出的信号和在接收台产生的两个射频信号中的相应的相位关系，表示精细位置数据。 还描述了用于在三维中定位位置的方法和系统。 给定车道中的精细范围，距离，分别由计算机或内部计算电路加到相应的粗略范围，每个粗略范围代表最接近相应发送站的全车道的总车道总数，总数为 接收站与每个发射站之间的距离。
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Patent Agency Ranking36.发明授权
公开(公告)号：US3801979A
公开(公告)日：1974-04-02
申请号：US3801979D
申请日：1972-04-26
Applicant: CHISHOLM J
Inventor： CHISHOLM J
Abstract: A time-sharing cyclic time slot system in which DME range measuring functions, collision avoidance functions, clock synchronization functions and/or data telemetry functions are all combined into an integrated repeating time sharing cycle in a non-interfering manner to achieve either general navigation and traffic control, or else stationkeeping, by the orderly exchange of pulse signals between participating ground stations and/or aircraft, and in which the cost of the system is minimized by using already existing ground and/or airborne VORTAC/TACAN/VOR/DME equipment and tuning the airborne transmitters and receivers in an agile manner to the various frequencies assigned for the performance of the above functions.
Abstract translation: 其中DME范围测量功能，防碰撞功能，时钟同步功能和/或数据遥测功能的分时循环时隙系统都以非干扰的方式被组合成集成的重复时间共享周期，以实现通用导航和 通过参与地面站和/或飞机之间的脉冲信号的有序交换，并且通过使用已经存在的地面和/或机载的VORTAC / TACAN / VOR / DME设备来最小化系统的成本，从而实现交通控制或其他驻车 并以敏捷的方式将机载发射机和接收机调谐到为执行上述功能而分配的各种频率。
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公开(公告)号：US3787665A
公开(公告)日：1974-01-22
申请号：US3787665D
申请日：1972-07-17
Applicant: MC DONNELL DOUGLAS CORP
CPC classification number: G01S11/08 , G04R40/06 , H04B7/18502
Abstract: Improvements in means for synchronizing remotely positioned timing devices including means to provide multiple error correction factors which are functions of the time error or time difference between the time keeping means in spaced systems or units being synchronized, said means being particularly useful in group synchronization by providing time convergence to a common synchronizing base. The use of multiple error correction factors restricts or limits relative timing errors between systems or units especially when in the process of changing from one reference time base location to another, and it provides means to bring timing devices at remote locations into closer synchronization on a continuing basis. The present means provide correction factors which are directly proportional to the synchronizing error including those cases where the correction versus error proportion is other than in a one-to-one relationship. This is especially advantageous in situations where there is a ground or master station responsibility that is shared on a rotating, shifting or location basis with other stations that are or may be synchronized but on a different time schedule or time base. Partial corrections in such situations can cause convergence of the synchronizing operation on a global or regional basis to a common time synchronization base and on a continuous and uninterrupted basis. The present means are also able to provide time synchronization of remotely located timing devices or units with or without the need to designate specific units or stations, or sets of units or stations, as masters and slaves. This means that the need for master or central accurately synchronized time references or stations which has characterized prior art time synchronized systems is no longer necessary.
Abstract translation: 包括用于同步远程定位设备的装置的改进，包括提供多个误差校正因子的装置，所述多个误差校正因子是间隔系统中的时间保持装置或同步的单位之间的时间差异的功能，所述装置在组同步中特别有用， 时间收敛到共同的同步基地。 多个误差校正因子的使用限制或限制系统或单元之间的相对定时误差，特别是在从一个参考时基位置改变到另一参考时基位置的过程中，并且其提供了使远程位置的定时设备在持续 基础。 本装置提供与同步误差成正比的校正因子，其中校正与误差比例不同于一对一关系。 这在具有基于或可以同步的其他站但在不同的时间表或时基上的基于旋转，移位或位置共享的地面或主站责任的情况下是特别有利的。 在这种情况下的部分校正可导致在全球或区域基础上的同步操作与公共时间同步基础并且在连续和不间断的基础上的收敛。 当前装置还能够提供或不需要指定特定单元或站或单元或站的集合作为主站和从站的远程定位设备或单元的时间同步。 这意味着不再需要对现有技术的时间同步系统表征的主或精确同步的时间基准或站的需要。
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公开(公告)号：US3781803A
公开(公告)日：1973-12-25
申请号：US3781803D
申请日：1972-04-10
Applicant: BENDIX CORP
CPC classification number: G01S11/08
Abstract: A collision avoidance system ground station has its clock phase synchronized with a master clock through the use of a line-ofsight radio link. Multiple two-way synchronization rangings are exchanged between the ground station and the master clock. A digital counter at the ground station obtains the average deviation of the ground station clock with respect to the master clock and applies this average deviation to calibrate or synchronize the ground station clock with the master clock. Subsequently, further multiple two-way synchronization rangings are exchanged between the ground station clock and the master clock. A digital counter at the master clock now obtains the average deviation of the master clock with respect to the ground station clock as a check of the validity of the ground station clock calibration.
Abstract translation: 防撞系统地面站通过使用视距无线电链路与时钟相位同步。 在地面站和主时钟之间交换多路双向同步测距。 地面站的数字计数器获得地面站时钟相对于主时钟的平均偏差，并应用该平均偏差校准或同步地面站时钟与主时钟。 随后，在地面站时钟和主时钟之间进一步交换多个双向同步测距。 主时钟上的数字计数器现在可以获得主时钟相对于地面站时钟的平均偏差，作为对地面站时钟校准的有效性的检查。
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公开(公告)号：US3769589A
公开(公告)日：1973-10-30
申请号：US3769589D
申请日：1971-11-16
Applicant: RCA CORP
Inventor： BUNTSCHUH R , ROULAND H
Abstract: A receiver is described for processing tone ranging signals from a time dissemination satellite such as TIMATION II. The receiver derives either receiver-station time (clock synchronization) or position location of the receiver-station with respect to the satellite with significant accuracy. The receiver generates a set of range tones as duplicates of those received from a satellite. They are developed as frequency coherent from a phase lock loop synchronized to the signal carrier frequency. A second loop, having a frequency synthesizer locked to the carrier loop, a mixer, a narrow band amplifier and a phase detector mix the locally generated range tones with a local oscillator signal which is frequency coherent with the carrier. This mixer output is then mixed with the receiver modulation to null out error between the received and local range tones. An output signal consisting of the lowest range tone signal is representative of the tone modulation from the satellite. Coherent processing by mixing at the front-end of the detector amplifier in the preferred embodiment allows for automatic calibration of non-zero receiver propagation delays, and the use of narrow band IF amplifiers thereby effecting high levels of unwanted signal rejection. The use of synthesized range tones allows for continuous time-delay or ranging measurements even though the satellite range tones are not continuously transmitted.
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公开(公告)号：US3755816A
公开(公告)日：1973-08-28
申请号：US3755816D
申请日：1970-05-01
Applicant: AII SYST
Inventor： KRATZER D
CPC classification number: G01S11/08
Abstract: The modulation of a radio signal transmitted from a satellite is correlated with a similar waveform generated by a stable oscillator at the receiver. The phase of the latter is varied in a direction to correlate it with the transmitted modulation, and a change in phase is used as a measure of the distance travelled by the transmitted signal. If the transmitted carrier is momentarily not received, the phase of the receiver waveform is not changed until communication is restored, and thereupon phase lock is restored and the phase change determined for the distance measurement.
Abstract translation: 从卫星发送的无线电信号的调制与在接收机处的稳定振荡器产生的类似波形相关。 后者的相位在使其与发射调制相关联的方向上变化，并且相位变化被用作由发射信号行进的距离的量度。 如果发送的载波暂时没有被接收，则在通信恢复之前，接收机波形的相位不改变，因此相位锁定被恢复，并且确定距离测量的相位变化。
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