The Application of orthogonality cross correlation algorithm in weak signal detection

Abstract

Abstract In this paper, the Xilinx Artix-7 FPGA chip was used as the processor to submit an orthogonality cross correlation algorithm with strong anti-interference capacity that constructed two reference signals have a large amplitude and same frequency with the reception signal from transducer to search the weak signal in the transducer. It can prominently improve the Signal to Noise Ratio (SNR) of transducer information and exact the feature information of reception transducer. The processing time of this algorithm is short and able to ensure the real-time performance of data transmission in the measurement.