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Signal acquisition system and method for satellite navigation receiver

A signal capture and satellite signal technology, applied in the field of navigation receivers, can solve the problems of hardware resource growth, inability to realize medium and long code signal capture, and inability to realize carrier Doppler fine parallel capture, so as to reduce storage capacity and improve data quality. The effect of processing speed

Active Publication Date: 2010-06-16
UNICORE COMM INC
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Problems solved by technology

[0009] Although the matched filter time-domain capture can achieve parallel and fast capture of the code phase, it can only be applied to a specific short code signal such as GPS C / A code, etc., and cannot realize dynamic configuration; nor can it realize medium and long code signal capture , the increase of the filter order will make the hardware resources increase geometrically; and the fine parallel capture of carrier Doppler cannot be realized, etc.

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  • Signal acquisition system and method for satellite navigation receiver
  • Signal acquisition system and method for satellite navigation receiver
  • Signal acquisition system and method for satellite navigation receiver

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[0068] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention.

[0069] It should be noted that, if there is no conflict, the embodiments of the present invention and various features in the embodiments can be combined with each other, and all are within the protection scope of the present invention. In addition, the steps shown in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and, although a logical order is shown in the flow diagrams, in some cases, the sequence may be different. The steps shown or described are performed in the order herein.

[0070] figure 1 It is a schematic composition diagram of an embodiment of the signal acquisition system of the...

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Abstract

The invention discloses a signal acquisition system and a signal acquisition method for a satellite navigation receiver so as to realize compatible processing of a plurality of GNSS satellite signals. The system comprises a channel parameter control list, a data storage, a digital down-conversion and down-sampling module, and a related energy accumulation and signal acquisition module, wherein the channel parameter control list stores control parameters and state parameters of a plurality of logical channels; the data storage stores intermediate-frequency sample data of satellite signals received by the receiver according to the control parameters; the digital down-conversion and down-sampling module performs digital down-conversion and down-sampling operation on the intermediate-frequency sample data according to the control parameters and the state parameters to acquire satellite sample data with zero intermediate frequency and low sample rate; and the related energy accumulation and signal acquisition module completes satellite signal despread, related energy accumulation, and signal acquisition and output according to the control parameters and the state parameters.

Description

technical field [0001] The present invention relates to a navigation receiver of a global navigation satellite system (Global Navigation Satellite System, GNSS), in particular to a signal acquisition system and method of a GNSS satellite navigation receiver. Background technique [0002] In order to track and demodulate GNSS satellite navigation signals, an acquisition unit is required to obtain a rough estimate of the signal's code phase and carrier Doppler frequency. The signal acquisition unit is an important part of the IF signal processing, and is used to realize the rapid and rough acquisition of the satellite spread spectrum signal, and its performance will directly affect the performance index of the receiver. [0003] The GNSS signal is a spread spectrum signal, and only by using the correlation characteristics of the spread spectrum code can the satellite signal be extracted from the noise. Since there is a Doppler frequency shift in the frequency component of the...

Claims

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Application Information

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IPC IPC(8): G01S19/24G01S19/29G01S19/30
Inventor 黄磊莫钧
Owner UNICORE COMM INC
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