The future satellite receiving technology is integrated control field receiving technical development trend, integration and application of technology can receive the tt greatly reduced cost and reduce the measurement of human resources, reduce the required control activities of the manual intervention level, reduce human error operating, misoperation.

With the development of space technology development and progress, each type of aircraft is more and more, and communication technology development, the model satellite signal modulation type also continuous development progress, due to a variety of modulation signal types of coexist, make the modulated signal automatic identification technology as the key technology of integrated receivers one of development. Based on the analysis of the current carefully modulated type automatically identification method, on the basis of the modulation signal based on circular spectrum automatic identification method in detail of the method, and the recognition effect in detail in chapter 3, the simulation of MATLAB to cycle the end, SSCA algorithm, the spectrum of the actual hardware platform were tested, and achieved good effect.

Diversity receiving technology in the application of integrated receivers, can better improve SNR of received signal, in the measurement process can more quickly, accurately capture and track the target signal. So, diversity receiving technology is developed and implementation of integrated receivers another key technology. The fourth part, according to the main factors influencing diversity technique with frequency in-phase adjustment, and SNR estimation, and carried on the detailed analysis and discussion. Aiming at the existing with the same frequency in the defects existing in the method, this paper puts forward a method based on the cross-correlation with frequency in-phase adjustment method, better solved the adjustment method limiting by modulation type. In signal SNR estimation aspect, the majority of by time-domain in frequency domain method, this paper put forward a kind of using Fourier transform SNR estimation convenience, this method is simple, achieved result idea is good, and use MATLBA, simulated.

Keywords: integration, automatic recognition, cross-correlation, with frequency in-phase, SNR estimation