Method for processing GPS receiver signal incoherent integral data

A GPS receiver and incoherent integration technology is applied in the field of data processing to provide a GPS receiver signal incoherent integration, which can solve the problems of not very large dynamic range, unsuitable integration process, large data storage space, etc. The effect of improving dynamic range, avoiding data overflow errors, and reducing complexity

Inactive Publication Date: 2010-12-15
XIAN HUAXUN MICROELECTRONICS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The general processing is to subtract an offset from the data this time, and then add it to the result of the previous accumulation, but the dynamic range is not very large, and it is not suitable for the long-time integration process. Even if it is barely applicable, it must be Take up a lot of data storage space

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  • Method for processing GPS receiver signal incoherent integral data

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Embodiment Construction

[0019] Concrete steps of the present invention are as follows;

[0020] In the first step, fast Fourier transform (FFT) is performed on the in-phase component I and quadrature component Q of the correlation result between the satellite signal and the local code, and their amplitudes are respectively recorded as Magn(I) and Magn(Q). For each code The amplitude of each frequency point of the phase, denoted as Mag, according to the formula Calculation.

[0021] The second step is to select the frequency point amplitude offset Bias, and subtract the frequency point amplitude offset Bias from the frequency point amplitude value Mag of each code phase to obtain the frequency point offset amplitude value of the above code phase, which is denoted as Mag Bias. The frequency point amplitude offset Bias, selects the mean value of all frequency point amplitude Mag in the last non-coherent integration process of the satellite signal, for example, if the 1023 code phases of the satellite...

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Abstract

The invention relates to the GPS receiver signal processing field, in particular to a non-coherent integration data processing method for GPS receiver signal. The method, which adds scaling function of non-coherent integration data, not only can limit non-coherent integration value and register RAM data bit to a small scope, but also can realize longtime integration and prevents information loss caused by data overflow; moreover, the method can well reflect the relevance of satellite signal and local code.

Description

Technical field [0001] The invention involves the field of signal processing of GPS receiving machine, and especially involves providing data processing methods that provide an unrelated points of GPS receiver signals. Background technique [0002] The commonly used general process of the global positioning system (GPS) signal processing: The CA code capture module will send satellite data from RF to the IQ separator, and divide the signal into the I and Q road signals to sum up and quantify.After the Doppler module was carried out, the Doppler phase value was stored in the memory, prepared the next rotation, and the data after rotating was sent to the relevant module.In the relevant module, the data after Doppler's rotation is related to the data sent by the local code generator.After the relevant operations are completed, the data is performed on a local cumulative operation, and then sent to the relevant integral modules and the unrelated integral module for related operations...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S1/02G01S5/02G01S5/14G01S19/30
Inventor 何杰程亚奇
Owner XIAN HUAXUN MICROELECTRONICS
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