Signal amplification circuit for GNSS receiver and receiver thereof

Abstract

The invention discloses a signal amplification circuit for a GNSS receiver and the receiver thereof. A first-stage gain-adjustable amplification circuit and a second-stage gain-adjustable amplification circuit are arranged. The first-stage gain-adjustable amplification circuit and the second-stage gain-adjustable amplification circuit are connected to form a signal amplification channel for amplifying GNSS satellite signals according to a preset gain. Two stages of gain-adjustable amplification circuits are arranged for superposition so as to expand the gain interval of signal amplification and realize controllable signal amplification gain, and meanwhile, in a receiver formed according to the two stages of gain-adjustable amplification circuits, the GPS satellite signal, the BDS satellite signal, the GLONASS satellite signal and the Galileo satellite signal in the GNSS satellite signals are independently received and amplified to the same amplitude according to the preset gain, the amplitude regularity of all kinds of satellite signals is guaranteed, the frequency domain law is visually analyzed or calculated, the utilization rate of signal data in positioning calculation is improved, and finally the positioning precision is improved.

Description

technical field [0001] The invention relates to the technical field of satellite positioning, in particular to a signal amplifying circuit for a GNSS receiver and a receiver thereof. Background technique [0002] A Global Navigation Satellite System (GNSS) generally refers to a system that allows a position fix to be determined based on GNSS signals received from a plurality of GNSS satellites. Each GNSS satellite transmits a GNSS signal that identifies the satellite and time of signal transmission. The GNSS antenna / receiver is configured to receive each of the GNSS signals transmitted by the visible GNSS satellites, and use the time-of-flight of each GNSS signal and the known position of each GNSS satellite to determine the distance from the GNSS antenna / receiver to the GNSS signal. The pseudorange or distance of the corresponding GNSS satellite. The plurality of calculated pseudoranges are used to trilaterate the position of the GNSS antenna / receiver in three-dimensional...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of signal amplifying circuit for GNSS receiver and receiver thereof, to solve the problem of GPS satellite signal, BDS satellite signal, GLONASS satellite signal and GNSS satellite signal contained in GNSS satellite signal by GNSS receiver in the prior art The Galileo satellite signal is only amplified with the same multiple of gain, the gain is not adjustable, and the amplification is limited, and the gain of the same multiple is set for the four types of satellite signals to make GPS satellite signals, BDS satellite signals, GLONASS satellite signals

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