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A software parallel receiving method for satellite navigation multi-pilot channels

A satellite navigation and receiving method technology, applied to satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve problems such as long operation time, reduce the number of multiplications, modify flexibly and conveniently, and improve real-time performance.

Active Publication Date: 2018-12-07
湖南中电星河电子有限公司
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  • Abstract
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Problems solved by technology

[0004] Aiming at the above-mentioned technical problems, the present invention provides a real-time parallel receiving method for satellite navigation multi-pilot channel software, which solves the problem of long computing time of navigation signal multi-pilot channel software in the prior art

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  • A software parallel receiving method for satellite navigation multi-pilot channels
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  • A software parallel receiving method for satellite navigation multi-pilot channels

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Embodiment Construction

[0026] Below, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 Shown is the schematic flow chart of the method of the present invention.

[0028] In the embodiment, the received intermediate frequency digital buffer signal is used as the input signal of the present invention.

[0029] (S1) Determine the starting point of the sampling data flow of the input signal according to the starting position of the second in the local time, vectorize the input signal, and define the N sampling data points within the next coherent integration time as the input signal vector S, S=[s (0) s(1)… s(N-1)] T . In the embodiment, the coherent integration time is determined according to indicators such as receiving sensitivity.

[0030] (S2) According to the pseudocode frequency f Pi , Pseudo-code initial phase ρ 0i and the correlation interval phase δ i , generating local pseudocode vectors wit...

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Abstract

The invention belongs to the satellite navigation frequency expansion signal receiving and processing field, and relates to a parallel receiving method for satellite navigation multiple pilot channel software. The method comprises the following steps: S1) vectorizing an inputted signal; S2) according to the pseudo code frequency fPi, the pseudo code initial phase [rou]0i, and the associated interval phase [delta]i, generating the local pseudo code vectors wherein the local pseudo code vectors of K channels with three associated interval phases [delta]i in each channel form a local multi-channel reference pseudo code matrix YEPL-K; S3) according to the Doppler frequency fdi and the carrier wave phase (illustrated in the figure), calculating the local multi-channel carrier wave Doppler signal matrix CK; S4) calculating the Hadamard product of the local multi-channel reference pseudo code matrix YEPL-K and the local multi-channel carrier wave Doppler signal matrix CK to obtain the local reference signal matrix YFd-EPL; and S5) based on the CUBLAS or MKL of GPU, calculating the product of the local reference signal matrix YFd-EPL and the inputted signal vector S to obtain K associated value vectors RK corresponding to different pseudo code delays of pilot signal channels. The method of the invention realizes the real-time associated receiving of satellite navigation broadband multiple pilot frequency channel software.

Description

technical field [0001] The invention belongs to the field of receiving and processing satellite navigation spread spectrum signals, in particular to a multi-channel software receiving and processing method for satellite navigation spread spectrum signals, and more specifically relates to a satellite navigation multi-pilot channel software parallel receiving method. Background technique [0002] In the navigation receiver, the receiving channel calculates the correlation value between the received signal after stripping the carrier and the local codes of different code delays. The correlation calculation of dozens of channels puts high demands on computing resources, and the real-time calculation requirements are high. The multi-channel design of the satellite navigation software receiver is one of the key technologies of the receiver. There is no message modulation on the pilot channel in the new system navigation signal, and the starting point of channel-related accumulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/25
CPCG01S19/254
Inventor 牟卫华倪少杰欧钢王飞雪孙广富李峥嵘苏映雪彭竞高毅
Owner 湖南中电星河电子有限公司
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