Design of Weak Signal Modulation for High Precision Sensors in Strong Signal Full Coverage Environment
In the presence of a strong signal,the weak signal of the sensor will be interfered with,submerged or con-sidered as noise,resulting in an inaccurate reading of the signal affecting the performance of the sensor.In order to solve this problem,a design method of weak signal modulation for high-precision sensor in strong signal full coverage environment is proposed.This method uses compressed sensing technology to reconstruct the complete weak signal set of high-precision sensor,and filters it by adaptive filter to reduce noise and improve the signal-to-noise ratio of weak signal.The spread spectrum modulation technique based on sinusoidal carrier is used to modulate the weak signal,and the weak signal is extended to the wide band to improve the anti-interference ability and transmission efficiency of the weak signal.The experimental results show that the proposed method has high signal reconstruction precision,can effectively filter the noise in the signal,and improve the anti-noise ability of the signal.And the signal modula-tion performance is good,strong anti-interference ability.
strong signal full coveragehigh precision sensorsweak signalcompression perceptionadaptive filterminimum mean square criterionspread spectrum modulationsinusoidal carrier wave
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