强信号全覆盖下反射式强度型传感器信号调制设计

Signal Modulation Design of Reflective Intensity Sensor Under Strong Signal Full Coverage

反射式强度型传感器在强信号全覆盖环境下常常受到干扰和影响,导致传感器信号的质量下降甚至失真,给后续的信号处理和数据分析带来了困难。对此,提出强信号全覆盖下反射式强度型传感器信号调制方法。首先,判断强信号全覆盖环境下传感器信号的稀疏性,并根据环境的干扰因素建立信号的观测矩阵,通过优化算法计算出稀疏向量的估计值,使用稀疏向量的估计值对观测信号进行补偿,得到补偿后的信号;然后,应用正交锁相放大技术,将补偿后的信号与严格正交的两路参考信号相乘,提高信噪比,获得增强后的信号;最后,利用连续相位多支路调制方法,对增强后的传感器信号展开比特信息分离、二维信号映射与载波相位调制操作,完成信号调制。实验结果表明,所提方法可扩展性强、稳定性高且抗干扰能力强。

Reflective intensity sensors are often subject to interference and influence in strong signal full coverage environments,resulting in a decrease or even distortion in the quality of sensor signals,which poses difficulties for subsequent signal processing and data analysis.A signal modulation method for reflective intensity sensors under strong signal full coverage is proposed.Firstly,determine the sparsity of sensor signals in a strong signal full coverage environment,and establish an observation matrix for the signal based on environmental interference factors.Calculate the estimated value of the sparse vector through optimization algorithms,and use the estimated value of the sparse vector to compensate for the observed signal,obtaining the compensated signal.Then,using orthogonal phase-locked amplification technology,the compensated signal is multiplied with two strictly orthogonal reference signals to improve the signal-to-noise ratio and obtain the enhanced signal.Finally,using the continuous phase multi branch modulation method,the enhanced sensor signal is subjected to bit information separation,two-dimensional signal mapping,and carrier phase modulation operations to complete signal modulation.The experimental results show that the proposed method has strong scalability,high stability,and strong anti-interference ability.