利用相关和多普勒容差特性的FDA-MIMO雷达运动目标检测波形设计

IF 7.1 2区 计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Jiawei Qi;Lan Lan;Guisheng Liao;Jingwei Xu
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引用次数: 0

摘要

本文研究了针对多普勒频移和距离模糊的多输入多输出(MIMO)雷达中运动目标检测的发射波形设计问题。在我们的系统设计中,FDA-MIMO雷达是通过发射设计的相位编码波形来开发的,在发射天线单元之间增加频率,这为目标检测提供了额外的距离-角度域自由度(dfs)。具体而言,针对高速运动目标,提出了在恒模约束和相似约束下设计低相关性相位编码波形的优化问题,并给出了具有良好多普勒容差的已知雷达波形。为了解决这类非凸优化问题,采用迭代方法提出了乘子投影的最大化最小化交替方向法(MM- admm -projection)算法,该算法通过构造一系列代理函数来逼近最优解。此外,通过引入ADMM方法,将每个代理函数分离为线性函数和二次函数,其中恒模约束和相似约束仅对前者施加。然后,提出了一种投影法来消除可行区域内的非凸约束。特别地,采用了共轭梯度法(CG)来减少计算量,并证明了该方法的局部收敛性。数值结果验证了所设计波形在考虑距离模糊的情况下检测运动目标的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Waveform Design for Moving Target Detection With FDA-MIMO Radar Exploiting Correlation and Doppler Tolerance Properties
This article investigates the problem of transmit waveform design in a Frequency Diverse Array (FDA)-Multiple-Input Multiple-Output (MIMO) radar for moving target detection against Doppler frequency shift and range ambiguity. In our system design, the FDA-MIMO radar is developed by transmitting designed phase-coded waveforms with a frequency increment between transmit antenna elements, which provides extra Degrees-Of-Freedom (DOFs) in the range-angle domains for target detection. In specific, for high-speed moving targets, an optimization problem is formulated to devise the phase-coded waveforms with low correlation properties under a constant modulus constraint as well as a similarity constraint involving a known radar waveform with good Doppler tolerance. To tackle such a non-convex optimization problem, the Majorization Minimization-Alternating Direction Method of Multipliers projection (MM-ADMM-projection) algorithm is developed in an iterative way, where an MM method is employed by constructing a series of surrogate functions to approximate the optimal solution. Furthermore, by introducing the ADMM method, each surrogate function is separated into linear and quadratic functions, where the constant modulus and similarity constraints are only imposed on the former. Then, a projection method is proposed to remove the non-convex constraints in the feasible region. In particular, the Conjugate Gradient (CG) method is implemented to reduce the computational burden, and the local convergence of the proposed method is proved. Numerical results are provided to demonstrate the effectiveness of the designed waveform in detecting moving target considering the range ambiguity.
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来源期刊
CiteScore
6.00
自引率
8.80%
发文量
1245
审稿时长
6.3 months
期刊介绍: The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.
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