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Parallel code phase search device and method for realizing parallel code phase search

A code phase and phase technology, which is used in measurement devices, satellite radio beacon positioning systems, instruments, etc., can solve the problems of inability to apply weak signal scenarios and high complexity of weak signal search, so as to reduce complexity, realize phase search, Avoid jumping effects

Active Publication Date: 2017-09-05
DATANG SEMICON DESIGN
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Problems solved by technology

To sum up, the above parallel code phase search algorithm has too high complexity when performing weak signal search, that is, the above parallel code phase search algorithm cannot be applied to weak signal scenarios

Method used

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  • Parallel code phase search device and method for realizing parallel code phase search
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  • Parallel code phase search device and method for realizing parallel code phase search

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Embodiment Construction

[0051] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0052] In order to make the content of the present invention easy to understand, before stating the embodiment of the present invention, a theoretical demonstration is carried out on the part of the parallel code phase search; the parallel code phase search algorithm actually uses the digital signal processing technology of Fourier transform to replace the digital correlation The correlation operation of the device, the equivalence of the two is proved below. Note that two periodic sequences whose length is N points are l(n) and j(n), and their correlation value sequence is d...

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Abstract

The invention discloses a parallel code phase search device and a method for realizing parallel code phase search. The method comprises the following steps: correspondingly jumping a product integral obtained from multiplication by a parallel code phase search circuit multiplier through a preset number of jump sequences to obtain corresponding jump products; coherently accumulating the jump products to obtain corresponding coherent accumulation results; and accumulating the real parts of the coherent accumulation results, determining the maximum jump sequence after accumulation, carrying out inverse Fourier transform and modulo operation on the coherent accumulation result corresponding to the jump sequence, and taking the modulo operation result as output to carry out phase search. In the technical scheme of the invention, by adding a random jump eliminating unit and coherent accumulation after the parallel code phase search circuit multiplier, the complexity of parallel code phase search is reduced, jump due to coherent accumulation is avoided, and phase search under the condition of weak signal is realized.

Description

technical field [0001] The invention relates to signal processing technology, in particular to a parallel code phase search device and a method for realizing parallel code phase search. Background technique [0002] Global Navigation Satellite System (GNSS) plays an increasingly irreplaceable role in people's daily life, especially in the fields of navigation, timing, surveying and mapping, etc. At present, global satellite navigation systems mainly include the Global Positioning System (GPS) of the United States, the Beidou (BD) system of China, the Global Navigation Satellite Positioning System (GLONASS) of Russia, and the Galileo system of Europe. In China and the Asia-Pacific region, GPS and Beidou systems are widely used; while in Russia, GPS and GLONASS are widely used. Since the Galileo system is far from mature, formal services cannot be provided yet. When using the global satellite navigation system for positioning, timing and other services, it is first necessary...

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Application Information

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IPC IPC(8): G01S19/30
Inventor 宋挥师
Owner DATANG SEMICON DESIGN
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