Adaptive Left-handed Right-handed Polarization Signal Power Synthesis Device

Abstract

The invention provides an adaptive levorgyration-and-dextrorotation polarized signal power synthesizing apparatus. Signals received by circular polarized antennas of a branch A and a branch B pass through a band pass filter, an LNA and a down converter in order, then enter an analog to digital converter, and then are converted into digital signals; the digital signals are output to a carrier wave peeling device; the carrier wave peeling device, a spreading code remover, an integration clearing device, a local code generator and a local carrier wave generator form a tracking loop; a Kalman filtering module tracks the integration clearing devices of branches A and B to output a complex angle so as to predict an angle change trend; the predicted result is used to conjugate compensate the output of the branch B; the outputs of the integration clearing devices of the two tranches are added after compensation, and then are input to a phase discriminator to realize combined tracking of a levorgyration branch and a dextrorotation branch. According to the invention, the integral tracking door threshold can be reduced; a receiver tracking loop can work more stable; and a more sensitive precise measureing scheme is provided.

Description

technical field [0001] The invention relates to a power combining device, which belongs to the field of satellite navigation. Background technique [0002] With the development of navigation technology, a special navigation system that transmits navigation signals through communication satellites appears in the navigation system. This system has the characteristics of flexible composition and low construction cost. In addition, different from the direct satellite navigation system, the navigation signal of this system is completely generated by the ground, so it is very easy to conduct preliminary tests such as navigation signal modulation mode and functional performance. This navigation system usually uses C-band transmission navigation Signal, so referred to as "C-band navigation system". [0003] Due to the limited link budget of the "C-band navigation system", the receiving terminal of the "C-band navigation system" in actual operation is almost in the threshold state ...

AI Technical Summary

Problems solved by technology

[0007] The beneficial effects of the present invention are: it is possible to realize the joint tracking of the signals received by the left-handed and right-handed two antennas, thereby reducing the overall tracking threshold and making the receiver tracking loop work more robustly. It can overcome the inherent additional phase shift of carrier phase ranging (referring to the problem that the right-handed original polarization antenna cannot perceive the phase change of the right-handed circular polarization signal when it rotates in situ), thus providing more sensitive and high-precision measurement in attitude control Program

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