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公开(公告)号：US11841417B2
公开(公告)日：2023-12-12
申请号：US17293035
申请日：2019-11-29
发明人： Yibao Luo
CPC分类号： G01S13/583 , G01S1/60 , H04W4/027 , H04W56/001 , H04W56/0035
摘要： Embodiments of the present disclosure relate to wireless communication field and disclose a method for speed measurement and positioning and a terminal. The speed measurement and positioning method in the present disclosure applied to a receiving end comprises: when it is determined that the local oscillation frequency of the receiving end is the same as that of each transmitting end, receiving a test signal transmitted by at least one transmitting end; determining frequency difference between the frequency of the test signal and the local oscillation frequency of the receiving end; determining, according to the frequency difference, the relative speed between the receiving end and the transmitting end corresponding to the test signal; and determining, according to the determined relative speed and first position information of the transmitting end corresponding to the test signal, second position information of the receiving end relative to the transmitting end corresponding to the test signal.
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公开(公告)号：US2952845A
公开(公告)日：1960-09-13
申请号：US53464155
申请日：1955-09-16
申请人： HUGHES AIRCRAFT CO
CPC分类号： G01S1/60 , G01S13/913 , H01Q3/22
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公开(公告)号：US3710335A
公开(公告)日：1973-01-09
申请号：US3710335D
申请日：1970-05-20
申请人： LEPLEY L
发明人： LEPLEY L
摘要： A navigation system for providing location information by triangulation, comprising at least two optical or radio or acoustic beacons spaced apart at predetermined locations, each beacon being fixed to project a frequency-dispersed spectrum in an azimuthal arc about the beacon, the arcs from the spaced beacons overlapping in the navigational area of interest, and means for identifying and comparing the frequency received from each of the beacons at any point in the area of overlap of the arcs, including an area chart showing the beacon spectra, and necessary receiving instrumentation in some embodiments.
摘要翻译： 一种用于通过三角测量提供位置信息的导航系统，包括在预定位置处间隔开的至少两个光学或无线电或声学信号，每个信标被固定以在围绕信标的方位弧中投射频率分散的频谱， 在感兴趣的导航区域中重叠的信标，以及用于识别和比较在弧的重叠区域中的任何点处从每个信标接收到的频率的装置，包括示出信标频谱的区域图，以及在某些情况下必需的接收仪器 实施例。
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公开(公告)号：US3898664A
公开(公告)日：1975-08-05
申请号：US44959574
申请日：1974-03-11
发明人： ZAKHEIM JACQUES
摘要： System for directing an aircraft along a glide path of variable angular direction. At a ground station, a generator of a radiofrequency carrier feeds an antenna radiating a lobe shaped directive pattern and the angular direction of the antenna lobe is scanned according to a cyclic reciprocating movement. The rate of variation of the lobe angular direction is linear in function of time and is equal for the two directions of the reciprocating scan movement. The carrier is modulated by a modulating signal whose frequency varies linearly and cyclically in function of time with a rate of variation equal to the rate of variation of the lobe angular direction and with a phase delay with respect to the lobe angular direction variation. Aboard the craft, the modulated carrier is demodulated and a circuit is provided for detecting the instants at which the frequency of the modulating signal is equal to a predetermined value. The sum of the amplitudes of the modulating signal at said instants represents the elevation of the glide path.
摘要翻译： 用于沿着可变角度方向的滑行路径引导飞行器的系统。 在地面站，射频载波的发生器馈送辐射波瓣指向图形的天线，并且根据循环往复运动扫描天线波瓣的角度方向。 角度方向的变化率在时间上是线性的，并且对于往复扫描运动的两个方向是相等的。 载波由调制信号调制，调制信号的频率随着时间的变化而以线性和周期性变化，变化率等于叶瓣角方向的变化率，相对于叶瓣角方向变化的相位延迟。 在工艺上，调制载波被解调，并且提供用于检测调制信号的频率等于预定值的时刻的电路。 所述时刻的调制信号幅度之和表示滑行路径的高程。
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