Array type channel, GNSS receiver and signal processing method

An array and channel technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of high resource overhead and complex GNSS receiver structure, and achieve the effect of simplifying the system operation state

Active Publication Date: 2013-12-25
HERONAV BEIJING TECH DEV
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem solved by the technical solution of the present invention is that the structure of the existing GNSS receiver is complex and the resource overhead is large

Method used

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  • Array type channel, GNSS receiver and signal processing method
  • Array type channel, GNSS receiver and signal processing method
  • Array type channel, GNSS receiver and signal processing method

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Embodiment Construction

[0049] Analyzing the design structure of the existing GNSS receiver, there are two main modules that cause the structure of the GNSS receiver to be complex and the resource overhead is too large: one is the capture module, and the other is the external coprocessor.

[0050] Specifically, there are two commonly used capture modules, one is the capture module using matched filter + FFT algorithm, and its signal processing flow in the capture state is usually as follows figure 2 shown; the other is the capture module using FFT+IFFT algorithm, and its signal processing flow in the capture state is usually as follows image 3 shown. A common problem in the two capture modules is that after digital down-conversion, a buffer with a huge storage capacity (Buffer) is required to store sampling data with sufficient integration time length. Therefore, the coherent integration time and non-coherent integration time of these two algorithms are limited by the buffer size after digital dow...

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Abstract

Provided are an array type channel, a GNSS receiver and a signal processing method. The GNSS receiver comprises a control unit, at least one array type channel, a code phase discriminator, a code loop filter, a carrier frequency discriminator, a carrier loop filter and a bit synchronizer. The code phase discriminator, the code loop filter, the carrier frequency discriminator, the carrier loop filter and the bit synchronizer respectively correspond to the array type channels which comprise a carrier digital-controlled oscillator, a plurality of digital down converter, a spread spectrum code digital-controlled oscillator, a spread spectrum code generator, a spread spectrum code shifting register set, a plurality of correlator sets, a plurality of incoherent accumulator sets and a preprocessing unit. According to the technical scheme, the GNSS receiver is simple in structure, capturing and tracking resource multiplexing can be achieved through the array type channels, the system operation state is simplified, and ideal capturing and tracking performance is achieved.

Description

technical field [0001] The invention relates to the technical field of signal receiving and processing, in particular to an array channel, a GNSS receiver and a signal processing method of the GNSS receiver. Background technique [0002] Global Navigation Satellite System (GNSS, Global Navigation Satellite System) is a satellite-based radio navigation system, which includes satellite constellations, ground monitoring systems and user terminal equipment, and can provide all-weather navigation for various carriers on land, sea and air. , Uninterrupted, high-precision, real-time navigation and positioning services. [0003] As GNSS gradually penetrates into daily life, especially in the fields of vehicle navigation and mobile Internet applications, location-based services (LBS, Location Based Service) gradually play an increasingly important role. The requirements for performance indicators are becoming more and more stringent, especially the start-up time and dynamic tracking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24
Inventor 吴骏李瑞寒王永平钱骅章国豪冯卫锋
Owner HERONAV BEIJING TECH DEV
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