基于单通道MIMO雷达的毫米波安检成像

Millimeter wave security imaging based on single-channel MIMO radar

毫米波多入多出(MIMO)雷达是一种前沿的安检成像技术。然而,由于采用了大量的发射/接收通道,MIMO雷达的成本和复杂度大大高于传统的单通道雷达。为了研制低成本、低复杂度的毫米波MIMO安检成像雷达,引入了双重码分复用技术。该方法可通过单发射/接收通道实现与传统多通道MIMO雷达相似的成像性能,对安检成像领域的发展和应用具有重要意义。此外,设计了基于失配滤波器理论的解复用码,其可在干扰条件下实现最大码分集增益。进行了仿真与实验以验证所提出方法的正确性与有效性,得到了满意的结果。

Millimeter wave(mmW) multiple-input multiple-output(MIMO) radar is state-of-the-art technique for security imaging.However,the exploitation of large number of transmit/receive channels leads to much higher cost and complexity for the MIMO radar than that of the single-channel radars.Aiming for developing the lowcost and low-complexity mmW MIMO security imaging radar,dual-code-division-multiplex(dual-CDM) technique has been proposed in this paper.It is worth noting that the proposed method can realize the similar imaging performance with the traditional multi-channel MIMO radar by a single transmit/receive channel,which is of great significance for the development and application in the area of security imaging.Moreover,the de-multiplex code,which can attain the maximum code diversity gain against the interference,is designed based on mismatched filter theory.Finally,both the numerical and the experimental results are provided to verify the correctness and the validity of the proposed methods,which shows that quite a satisfactory imaging perfonnance is achieved.