论文标题
共振动FDA雷达
Co-Pulsing FDA Radar
论文作者
论文摘要
基于频率不同阵列（FDA）雷达的目标定位最近引起了重大的研究兴趣。跨FDA天线的线性频率偏移（FO）产生了范围依赖的beampattern，该范围允许对范围和到达方向的联合估计（DOA）。先前的FDA作品主要集中在一维线性阵列上，仅估计方位角和范围，同时忽略高程和多普勒速度。但是，在许多应用中，后两个参数对于目标定位也至关重要。此外，对雷达系统也有兴趣，该系统在时间，多普勒或空间信号域中采用更少的测量。我们通过提出共同利用L形FDA来解决这些多重挑战，其中在L形的共阵容阵列的整个元素上应用了共同prime FOS，并且每个元素都以非均匀的共晶脉冲重复间隔（c $^3 $或c-cube）进行。这种共振动FDA在范围 - 齐路 - 催化多普勒域中的目标定位产生了明显的自由度（DOF），同时还降低了定位和传输光谱使用情况。通过利用这些DOF，我们开发了C-Cube自动配对（Cing）算法，其中所有参数均为IPSO在关节估计过程中成对。 We show that C-Cube FDA requires at least $2\sqrt{Q+1}-1$ antenna elements and $2\sqrt{Q+1}-1$ pulses to guarantee perfect recovery of $Q$ targets as against $Q+1$ elements and $Q+1$ pulses required by both L-shaped uniform linear array and L-shaped linear FO FDA with uniform pulsing.我们为C-Cube FDA的关节角度范围多普勒估计误差得出CRAMér-RAO边界（CRB），并提供了CRB存在的条件。使用我们的cing算法进行数值实验，在参数恢复方面表现出巨大的性能改进。
Target localization based on frequency diverse array (FDA) radar has lately garnered significant research interest. A linear frequency offset (FO) across FDA antennas yields a range-angle dependent beampattern that allows for joint estimation of range and direction-of-arrival (DoA). Prior works on FDA largely focus on the one-dimensional linear array to estimate only azimuth angle and range while ignoring the elevation and Doppler velocity. However, in many applications, the latter two parameters are also essential for target localization. Further, there is also an interest in radar systems that employ fewer measurements in temporal, Doppler, or spatial signal domains. We address these multiple challenges by proposing a co-prime L-shaped FDA, wherein co-prime FOs are applied across the elements of L-shaped co-prime array and each element transmits at a non-uniform co-prime pulse repetition interval (C$^3$ or C-Cube). This co-pulsing FDA yields significantly large degrees-of-freedom (DoFs) for target localization in the range-azimuth-elevation-Doppler domain while also reducing the time-on-target and transmit spectral usage. By exploiting these DoFs, we develop C-Cube auto-pairing (CCing) algorithm, in which all the parameters are ipso facto paired during a joint estimation. We show that C-Cube FDA requires at least $2\sqrt{Q+1}-1$ antenna elements and $2\sqrt{Q+1}-1$ pulses to guarantee perfect recovery of $Q$ targets as against $Q+1$ elements and $Q+1$ pulses required by both L-shaped uniform linear array and L-shaped linear FO FDA with uniform pulsing. We derive Cramér-Rao bounds (CRBs) for joint angle-range-Doppler estimation errors for C-Cube FDA and provide the conditions under which the CRBs exist. Numerical experiments with our CCing algorithm show great performance improvements in parameter recovery.
