Noise Cancellation Method of the Telemetry Signal Based on Time Series Analysis

Hereby a telemetry signal noise cancellation method which the reference noise is obtained by using the time series analysis was proposed. In flight test, the telemetry signal is usually single channel signal, and the noise cancellation method is lack of reference noise, thus the noise cancellation method cannot be used in the processing directly. By analyzing the time series of the flight test process, we can take the stationary stage signal as the reference noise, and use it to process the feature stage signal for noise cancellation. This method can use the noise cancellation method in the processing for telemetry signal, which can effectively improve the SNR (signal to noise ratio) to lay the foundation for the subsequent processing of the signal. Simulation signal and the high frequency vibration signal processing in the test of a flight test proves the validity of the proposed method.