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GNSS-R delay mapping software receiver based on BAP

A software receiver and delay mapping technology, used in satellite radio beacon positioning systems, measurement devices, instruments, etc., can solve the problems of increased receiver computational complexity and processing time, suppress reflected signal components, and improve processing gain. , the effect of suppressing white noise

Active Publication Date: 2014-06-18
ZHEJIANG BEITE ELECTRONICS TECH
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Problems solved by technology

Usually, the method to increase the processing gain is to extend the correlation integration time or perform coherent accumulation, but with the delay of the correlation integration time and the increase of the number of coherent accumulation, the computational complexity and processing time of the receiver increase accordingly

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  • GNSS-R delay mapping software receiver based on BAP

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Embodiment Construction

[0029] In the BAP-based GNSS-R delay mapping software receiver of the present invention, the initial input is a direct GNSS digital intermediate frequency signal and a reflected GNSS digital intermediate frequency signal after being received by RHCP and LHCP antennas, amplified by a radio frequency front end, frequency down-converted, and AD sampled.

[0030] Such as figure 1 As shown, the GNSS-R delay mapping software receiver of the present invention includes a direct channel, a code generation module, a carrier generation module, a BAP processing module, and a related module.

[0031] The direct channel is used to capture and track the direct digital intermediate frequency signal; the code phase τ of the direct digital intermediate frequency signal is accurately obtained by tracking d and the carrier Doppler value f d ; Provide reference values ​​for carrier generation and code generation in subsequent processing.

[0032] The code generation module will code phase τ d T...

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Abstract

The invention discloses a GNSS-R delay mapping software receiver. The GNSS-R delay mapping software receiver comprises a direct mapping channel, a code generating module, a carrier generating module, a BAP processing module and relevant modules. Direct mapping digital intermediate frequency signals are captured and tracked through the direct mapping channel, and local codes are generated through the code generating module. Local carriers are generated by the carrier generating module to carry out carrier stripping on reflected signals. The reflected signals after carrier stripping are divided into L blocks with the length of one ms through the BAP processing module, the L blocks are overlaid and averaged, white noise suppression and non-specular reflection point signal component suppression are achieved, coherent processing is carried out on the signals processed by a BAP and the local codes through the relevant modules, and one-dimensional correlation power is output. The GNSS-R delay mapping software receiver has the advantages of having the functions of white noise suppression and non-specular reflection point signal component suppression, being small in computation complexity and the like.

Description

technical field [0001] The present invention relates to a delay mapping (Delay Mapping) software receiver of GNSS-R (Global Navigation Satellite system-Reflectometer) technology, specifically, a GNSS-R delay based on BAP (Block Averaging Pre-Processing) method Mapping software receiver, the one-dimensional correlation power output by the receiver can be mainly used for sea surface altimetry. Background technique [0002] The use of GNSS reflected signals for ocean remote sensing is one of the new technologies of satellite remote sensing technology, and it is a passive dual-base or multi-base remote sensing technology. GNSS-R remote sensing technology receives the GNSS signal reflected by the earth's surface through shore-based, machine-based or space-based special receiving equipment, and uses related processing technology to obtain the one-dimensional time delay correlation power or two-dimensional time delay corresponding to the reflection surface Puller correlation power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/29G01S19/30
CPCG01S19/29G01S19/30G01S19/37
Inventor 杨东凯王峰李伟强张波
Owner ZHEJIANG BEITE ELECTRONICS TECH
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