混响室条件下失真信号消噪技术研究

Research on Noise Elimination Technology in Reverberation Chamber

为研究混响室条件下失真信号消噪恢复技术,采用Mallat算法和预失真技术的失真数据补偿方法,首先,利用蒙特卡洛方法 (Monte Carlo)模拟混响室内电磁环境,获得全向辐照电磁环境和接收系统的联合传递函数;再将联合传递函数的反函数置于预失真器中,用于补偿信号通过混响室内全向辐照电磁环境和接收系统后产生的误差和畸变。利用验证信号进行验证,结果表明该方法可有效消除系统带来的误差,较好地恢复和保持了接收信号信息。

In order to eliminate the distortions from the electromagnetic field inreverberation chamber and receiving system,one method based on Mallat algorithm and predistortion technology is proposed in this paper. Firstly,the reverberation chamber can be simulated by Monte Carlo method,and the united transfer function of omnidirectional radiation electromagnetic environment and receiving system can be obtained. Furthermore,the inverse function of united transfer function is embedded in the predistortion component to compensate the signal error and signal distortion caused by omnidirectional radiation electromagnetic environment and receiving system. One waveform is chosen to verify this technology,and the results show that the proposed method can effectively eliminate the errors from system,and can significantly recover and maintain the received signal information.