Weak signal capturing method and device, computer equipment and storage medium

Abstract

The invention relates to a weak signal capturing method and device, computer equipment and a storage medium. The method comprises the following steps: carrying out carrier separation on an acquired digital signal to be processed to obtain an initial signal, and grouping the initial signal to obtain a data block with a preset length; and performing coherent accumulation on each data block with thepreset length to generate a coherent accumulation result; dividing the data blocks with the preset lengths into odd groups of data blocks and even groups of data blocks, respectively performing incoherent accumulation on the odd groups of data blocks and the even groups of data blocks according to coherent accumulation results to generate corresponding incoherent accumulation results, and determining a larger value as a judgment threshold value from the obtained incoherent accumulation results; and comparing the judgment threshold with a preset capture threshold, and successfully capturing thesignal when the judgment threshold is greater than or equal to the preset capture threshold. With application of the method, the coherent accumulation frequency can be reduced, the operand and the complexity are reduced, the weak signal is accurately and quickly captured, and the weak signal capturing work efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of communication, in particular to a weak signal acquisition method, device, computer equipment and storage medium. Background technique [0002] With the development of communication technology, the technology of using Global Positioning System (GPS) or Beidou Satellite Navigation System (BDS) to provide users with precise position, speed and precise time information has been widely used. In order to provide navigation services to users in different locations, it is necessary to capture associated signals and perform further analysis, processing and feedback. [0003] Since the actual location of the user is usually in a more complex environment, the signal will be weakened to a weaker situation. In order to ensure that the weaker signal can be successfully captured and provide users with accurate navigation services, it is necessary to apply the weak signal acquisition method. [0004] Tradition...

AI Technical Summary

Problems solved by technology

Among them, the coherent accumulation algorithm can effectively remove the high-frequency components and noise of the signal, but when the signal power is low, it needs to increase the coherent accumulation time to effectively capture the signal

Non-coherent accumulation performs non-coherent accumulation on the square value after modulus of coherent accumulation, which can solve the problem that coherent accumulation cannot be accumulated for a long time, but it will cause loss, and the effect is not ideal

The differential coherent accumulation is only applicable to the case where the coherent accumulation time is short. When the coherent accumulation time is long, the differential coherent accumulation will be more sensitive to bit flipping, which will affect the capture of effective information.

[0005] Therefore, the currently commonly used weak signal capture method is not ideal for successfully capturing effective weak signals, and the work efficiency of weak signal capture is relatively low.

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