A Polarization Diversity Combination Method for Frequency Hopping Signals

Abstract

The invention relates to a frequency hopping signal polarity diversity merging method. The method comprises the following steps: firstly, carrying out AD sampling on signals received by levorotation and dextrorotation rotation polarizing antennas, and obtaining two paths of baseband signals after digital down conversion; then carrying out conjugate multiplication on the levorotation and dextrorotation baseband signals, performing FFT conversion to obtain a frequency offset estimated value and a phase offset estimated value of the levorotation baseband signal, and correcting the deviation to accomplish the open loop correction of the levorotation branch; and finally carrying out weighted merging on the corrected baseband signal to accomplish the polarity diversity merging of frequency hopping signals. The invention provides a frequency hopping signal polarity diversity merging processing method, in which the frequency offset and phase offset of two paths of signals are processed in real time in an open loop control mode, compared with the closed loop control mode, the method has the advantages of simple structure, high processing speed and the like, and the method is very suitable for receiving frequency hopping telemetering signals to realize an optimal transmission signal-to-noise ratio.

Description

technical field [0001] The invention relates to the field of remote measurement communication, in particular to a method for combining polarization diversity of frequency hopping signals. Background technique [0002] The telemetry system is an indispensable and important part of the ballistic missile system. In the development process of the ballistic missile's life, the telemetry system is used to obtain the working state parameters and environmental data of each system in the flight test, in order to determine the performance of the missile or perform failure analysis. Provide evidence. [0003] In the missile telemetry system, the radio channel plays the role of information transmission between the telemetry data collector on the missile and the ground data processing station, and serves as a bridge for information exchange and communication between the missile and the ground launch control command system. Low latency, on the one hand, requires strong robustness, that i...

AI Technical Summary

Problems solved by technology

[0005] Since the traditional telemetry system adopts a fixed-frequency system, the signal frequency and phase adjustment is realized through a closed-loop method of a phase-locked loop, and the frequency-hopping system cannot be eliminated in time by a phase-locked loop method due to the fact that each hop signal cannot reside at a certain frequency. The frequency offset phase error of the signal, so the traditional method is no longer suitable for diversity combining of frequency hopping signals

Images