宽带信号检测方法与性能分析

当雷达发射宽带信号时, 距离分辨单元可能比目标的尺寸小，导致目标在距离维扩展从而导致能量分散，常规的检测方法可能失效。基于此，文中分析了宽带信号的目标回波特性，提出了一种分段积累相关检测算法，并给出了时域和频域两种实现途径。通过仿真和实测数据分析，验证了时域和频域两种方法的同等优势，信噪比可以比常规处理高5 dB。最后基于工程实现的角度，分析了时域和频域两种方法的优缺点。

New Methods on Wideband Signal Detection and Performance Analysis

When radar transmits wideband signals, the range resolution is smaller than the size of the target. Then the target is spread in the range dimension and the energy is scattered. The traditional detection strategies may fail. The characteristics of the echoes for wideband radar are analyzed in this paper. A new method called segment integrated correlation detection(SICD) for wideband signal detection is proposed. Two realized methods for segment integration coherent detection on time and frequency domain are both introduced. By simulation and analysis of measured data, the equivalent advantage is certified for the time domain method and frequency domain method. The SICD method can enhance SNR 5 dB than traditional method. Finally, in view of realization on engineering, the advantage and disadvantage are analyzed for the time domain method and frequency domain method.