Channel prediction method for deep space exploration under weak solar scintillation

Abstract

The invention discloses a channel prediction method for deep space exploration under weak solar scintillation. A second order AR model is adopted for describing a scintillation power spectrum. A solarscintillation amplitude fluctuation predicting equation is y[n+i] = b1y[n-1] + b2y[n-2]. In the formula, i is greater than or equal to 0 and indicates the jth prediction; and b1 and b2 are predictioncoefficients and are obtained by adopting linear minimum mean square error, namely LLS. By means of signaling channel prediction, the signaling channel predicting method can improve the power use efficiency of an emitter of a detector, establish a reliable transmission link between the detector and the earth and realize the self-adaptive power control, modulation and demodulation of the deep space detector, thereby being favorable for improving the resource use efficiency and detection efficiency of the deep space exploration. The signaling channel predicting method is suitable for the heterogeneous communication environment such as a wireless sensing network, a self-organized network and the like, and assumes good transformation application prospect in aerospace, aviation, military affairs, social economy and other fields.

Description

technical field [0001] The invention relates to a method for predicting a deep-space exploration channel, in particular to a method for predicting a deep-space exploration channel under weak sun flickering. Background technique [0002] Solar scintillation refers to irregular amplitude fluctuations in radio source observation records or space wireless transmission signals caused by irregularities in the solar corona or solar wind. In deep space exploration, the irregular amplitude fluctuation of the wireless transmission signal will lead to an increase in the transmission bit error rate and a decrease in reception performance. Especially during the superior conjunction of the planets, when the Sun-Earth-probe angle (SEP) is small, it may not be possible to establish a reliable transmission link. To solve this problem, the method of increasing the transmitter power of the deep space probe can be adopted, but the power of the transmitter of the deep space probe is often limit...

AI Technical Summary

Problems solved by technology

In deep space exploration, the irregular amplitude fluctuation of this wireless transmission signal will lead to an increase in the transmission bit error rate and a decrease in reception performance

Especially during the superior conjunction, when the Sun-Earth-probe angle (SEP) is small, it may not be possible to establish a reliable transmission link

To solve this problem, the method of increasing the transmitter power of the deep space probe can be adopted, but the power of the transmitter of the deep space probe is often limited, and the unlimited increase of the transmitter power may affect the work of other instruments of the deep space probe. Very bad for deep space exploration

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