目标引入干扰条件下的Wald检测器

多径效应或多输入多输出(MIMO)雷达发射波形不完全正交的情况下会引入干扰，此种干扰通常被称为目标引入干扰。针对存在目标引入干扰的目标检测问题，该文基于Wald准则提出适用于均匀环境和非均匀环境下的自适应检测器，所提出的检测器可有效抑制目标引入的干扰，且具有恒虚警率(CFAR)特性。仿真结果表明，当干扰子空间已知时，该文所提出的检测器可完全抑制干扰，当干扰子空间未知时，所提检测器可有效抑制位于信号子空间的正交补空间内的干扰。

Wald Tester for Signal Detection in the Presence of Target-induced Interference

In radar system, the target-induced interference often arises due to multipath effect or non-ideal transmit waveform of Multiple-Input Multiple-Output (MIMO) radar. For the issue of detecting a target with target-induced interference, the detectors are proposed based on the design criterion of Wald test both in the homogeneous environment and partially homogeneous environment. The proposed detectors are proved to be effective for suppressing the target-induced interference and they can ensure the desirable Constant False Alarm Rate (CFAR) property with respect to the unknown parameters of the noise. Simulation results show that the proposed detectors can suppress the interference effectively when the interference subspace is known, and can suppress the interference lying in the orthogonal complement space of the nominal signal subspace when the interference is completely unknown.