"Phased-MIMO radar: Transmit beamspace, transmit-receive beamforming, parameter estimation, and applications"

对越来越先进的雷达技术的需求是由雷达的无处不在的适用性决定的，从应用于生物医学工程的微型雷达到应用于射电天文学的宏观雷达。现代雷达技术处理不断增加的信息量并提供高空间分辨率。然而，未来的雷达应用将使雷达系统超越其基本的灵敏度和信息限制。例如，目前的雷达技术几乎无法对抗隐形技术，因为它从根本上受到发射和接收能量的抑制。拟议的研究计划的主要目标是开发和推进一种新的雷达范例，该范例结合了多输入多输出（MIMO）雷达（主要优点是波形多样性）和传统相控阵雷达（相干处理）的优点。MIMO雷达采用共置天线，可以提高空间分辨率，增加可探测目标的最大数量，提高参数可识别性，虚拟扩展阵列孔径，增强雷达灵活性。然而，这些优点是以损失相干处理增益为代价的。

The desire for more and more advanced radar technologies is dictated by radar's ubiquitous applicability, ranging from micro-scale radars applied in biomedical engineering to macro-scale radars used in radioastronomy. Modern radar technology processes ever-increasing quantities of information and offers high spatial resolution. However, future radar applications will stretch radar systems beyond their fundamental sensitivity and information limits. For example, current radar technology offers little to counter stealth technology as it is fundamentally inhibited by energy transmitted and received. The prime goal of the proposed research program is to develop and advance a new radar paradigm which combines the advantages of the recent radar technique known under the name multiple-input multiple-output (MIMO) radar (main advantage is waveform diversity) with the advantage of traditional phased-array radar (coherent processing). The use of MIMO radar with colocated antennas enables improving spatial resolution, increasing the maximum number of detectable targets, improving parameter identifiability, virtually extending the array aperture, and enhancing the radar flexibility. However, these advantages come at the price of losing coherent processing gain.