A method and device for generating X-band unidirectional ranging signals for deep space exploration

Abstract

The invention provides a method and a device for generating X-frequency band one-way ranging signals for deep space exploration. The method provided by the invention can generate one-way ranging sidetone signals in the X-frequency band. The device provided by the invention comprises simulation devices such as a crystal oscillator, a frequency divider, a low-pass filter, a frequency multiplier, a phase shifter and the like, and turn-off of DOR (Differential One-way Ranging) sidetone signals can be controlled through an instruction. The crystal oscillator generates initial reference signals, one path of the initial reference signals are inputted into the frequency multiplier after power division, the frequency multiplier generates X-frequency band carriers, another path of the initial reference signals are inputted into a divide-by-two frequency divider, a left path of the initial reference signals are inputted into a divide-by-ten frequency divider, and two paths of DOR sidetone signals are generated respectively. Phase modulation is carried out on the two paths of DOR sidetone signals in the X-frequency band, and the two paths of DOR sidetone signals are outputted after being amplified and isolated. Divide-by-two frequency division and divide-by-ten frequency division are completed by a decimal counter. The X-frequency band one-way ranging signals generated by using the method provided by the invention can complete a function of accurate ranging for a deep space probe by being matched with relevant ground station equipment, thereby being applicable to the fields of lunar exploration, Mars exploration and the like.

Description

technical field [0001] The invention relates to a space-borne phase modulation transmitter, in particular to a method and device for generating an X-band one-way ranging signal for deep space exploration. Background technique [0002] In some key stages of deep space exploration, such as the approach stage before landing on a planet and the orbit capture stage, precise orbit determination of the probe is required. Very Long Baseline Interferometry (VLBI) technology is one of the important means for deep space exploration and precise orbit determination. NASA, European ESA and my country have widely used VLBI technology in lunar probes and deep space exploration. The precision measuring track of the device. [0003] The VLBI technology requires the use of DOR (Differential One-way Ranging) sidetone signals, whose spectral lines contain a main carrier and several sidetone signals. Considering that the frequency band assigned to the deep space exploration mission has a bandwid...

AI Technical Summary

Problems solved by technology

[0004] The DOR signal is a side tone signal modulated on the main carrier through phase modulation. Since the X-band operating frequency is relatively high, you can choose to modulate it at a lower frequency, such as the S-band, and then obtain the X through mixing or frequency multiplication. Frequency band DOR signal, using this method the circuit structure is more complicated

The realization of two frequency division and ten frequency division generally requires the use of a special frequency divider, which is convenient to use and has a simple circuit, but the price is more expensive and the versatility is poor

And because it uses two frequency multipliers, the device is bulky

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