Single-board three-antenna high-precision positioning and directional receiver

Abstract

The invention relates to the technical field of satellite positioning and discloses a single-board three-antenna high-precision positioning and orientation receiver. The single-board three-antenna high-precision positioning and orientation receiver comprises a radio frequency unit, a base band processing unit, an orientation processing unit and an interface unit. The radio frequency unit comprises a plurality of radio frequency channels, a frequency synthesizer and a clock, wherein each radio frequency channel independently receives radio frequency signals of a plurality of frequency points, synchronization of signals of the radio frequency channels is completed by the clock, and the working frequency point of each channel is determined by the frequency synthesizer. The base band processing unit is connected with the radio frequency unit, the orientation processing unit and the interface unit in a coupling mode to complete radio frequency signal capturing, tracking and demodulating and then supply processed radio frequency signals to the orientation processing unit, and observed quantity data are output at the same time. The orientation processing unit is further connected with the interface unit in a coupling mode to complete positioning, orientation and calculating and then output results through the interface unit. Through integrated design, the single-board three-antenna high-precision positioning and orientation receiver eliminates the clock correction of two receivers, facilitates orientation algorithm optimization and has high flexibility.

Description

technical field [0001] The invention relates to the technical field of satellite positioning, in particular to a single-board three-antenna high-precision positioning and directional receiver. Background technique [0002] When using pseudo-range for satellite positioning, whether it is single-point positioning (SPP) or pseudo-range differential positioning (DGPS), usually the positioning accuracy can only reach the sub-meter level at best. In the field of high-precision positioning such as geodesy and earthquake monitoring, the positioning accuracy requires centimeters or even millimeters, and carrier phase observations are required for positioning. Among them, carrier phase relative positioning (also known as carrier phase differential positioning) technology is the most widely used. The principle of carrier phase relative positioning technology is similar to that of code differential positioning technology. They both use two or more receivers to observe synchronously for ...

AI Technical Summary

Problems solved by technology

[0005] The solutions in the prior art all use multiple navigation boards to build a multi-antenna system. The front-ends, basebands, and clocks of different boards are all independent. Directional measurement accuracy has a great impact, and the receiver has a large volume and high power consumption. In addition, the use of multiple identical navigation boards obviously has a lot of hardware redundancy design.

Images