System for correcting for doppler shift frequency error of transmitted signals专利检索-多轴飞行器飞行器飞机类型专利检索查询-专利查询网

System for correcting for doppler shift frequency error of transmitted signals

阅读：373发布：2022-11-16

专利汇可以提供System for correcting for doppler shift frequency error of transmitted signals专利检索，专利查询，专利分析的服务。并且A system for correcting the error in frequency of color television signals received from space vehicles resultant from a Doppler shift in frequency from the desired frequency of the signals as initially transmitted. A rotating magnetic recording disk includes two magnetic recording heads positioned at the same radius and angularly separated relative to the axis of rotation of the disk for communicating with a common recording band of the disk. The received signal is recorded by one head and read by the other, one head being fixed in position and the other being angularly movable about the disk to provide a time delay of controllable duration of the signal, between recording and reading thereof. Means are provided for adjusting the rate of change of the angular separation of the heads as a function of the Doppler shift frequency error, thereby to produce an output signal from the read head of the desired initial frequency. An embodiment with a plurality of heads in cascade is included.，下面是System for correcting for doppler shift frequency error of transmitted signals专利的具体信息内容。

权利要求

1. A system for correcting an error in the frequency of an input signal, comprising in combination: a. a magnetic recording disk rotatable about an axis of rotation; b. first and second magnetic transducer means respectively comprising a plurality of recording, and a plurality of reading heads, said recording and reading heads being divided into a plurality of head pairs with each of said head pairs including at least a recording and a reading head; c. means for mounting each of said head pairs on a radius and a fixed distance from said axis of rotation such that each of said head pairs can be used to record data on and read data from a common track on said recording disk, with the heads comprising each of said head pairs having an angular separation therebetween; d. means for coupling said recording and reading heads in cascade with a first recording head recording the input signal and a last reading head of the cascade connection producing the output signal, to provide a time delay whose duration is controlled by the angular positions of said reading heads with respect to said recording heads.

2. A system for correcting an error in frequency of an input frequency, comprising in combination: a. a magnetic recording disk rotatable about an axis of rotation; b. first and second magnetic transducer means for respectively recording and reading an input signal, said first magnetic transducer means comprising a first plurality of magnetic recording heads mounted at radially displaced positions along a first common radius relative to said axis of rotation for communicating with a corresponding plurality of concentric, radially displaced recording bands of said disk, said second magnetic transducer means comprising a second plurality of magnetic reading heads corresponding to said first plurality of recording heads mounted, respectively, at the same radially displaced positions along a second common radius angularly separated from said first common radius relative To said axis of rotation for communicating with the corresponding radially displaced concentric recording bands of said disk, said recording and reading heads of said first and second pluralities thereof being electrically coupled in cascade with a first recording head recording the input signal and a last reading head of the cascade connection producing the output signal, c. means for mounting said second magnetic transducer for rotation about said axis of rotation to vary the angular separation between said first and second magnetic transducer means; d. means for rotating said recording disk at a predetermined uniform rotational velocity; e. means for deriving from the output signal produced by said second transducer means a signal representing the frequency of said output signal; f. means for receiving a reference signal representing the desired frequency of said output signal and for receiving said signal representing the frequency of said output signal produced by said deriving means and for comparing the reference frequency signal and said signal representing the frequency of said output signal to produce a control signal corresponding to any difference in frequency therebetween; and g. means responsive to said control signal for moving the rotatably mounted second magnetic transducer means to change said angular separation at a rate related to the difference between the frequency of said output signal and the desired frequency thereof to produce at said second magnetic transducer means an output signal of the desired frequency.

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System for correcting for doppler shift frequency error of transmitted signals

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