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    • 32. 发明申请
    • MIMO TRANSMIT BEAMFORMING UNDER UNIFORM ELEMENTAL PEAK POWER CONSTANT
    • 基于均匀单元峰值功率的MIMO发射波束
    • WO2008157646A3
    • 2009-02-26
    • PCT/US2008067412
    • 2008-06-18
    • UNIV FLORIDALI JIANZHENG XIAYUXIE YAO
    • LI JIANZHENG XIAYUXIE YAO
    • H04B7/04
    • H04B7/0417H04B7/0626H04B7/0634H04B7/0639H04B7/0663
    • Embodiments of the invention pertain to a MIMO transmit beamforming method that is under the uniform elemental peak power constraint. Embodiments of the MIMO transmit beamforming method can be implemented without requiring unbalanced transmit power allocations among the various transmit antennas. Traditionally, MIMO transmit beamformer design under the uniform elemental power constraint is a non-convex optimization problem. Embodiments of the invention can relax this problem to a convex optimization problem via Semi-Definite Relaxation (SDR). For the multi-input single-output (MISO) case, the globally optimal solution to the relaxed problem has a closed-form and is also optimal to the original problem. With minor modifications, the closed-form MISO solution can be extended to that for the MIMO case, and a suboptimal closed-form solution to the MIMO transmit beamformer design can be obtained.
    • 本发明的实施例涉及在均匀元素峰值功率约束下的MIMO发射波束成形方法。 可以实现MIMO发射波束形成方法的实施例,而不需要各种发射天线之间的不平衡发射功率分配。 传统上,均匀元素功率约束下的MIMO发射波束形成器设计是一个非凸优化问题。 本发明的实施例可以通过半定位松弛(SDR)将该问题放松到凸优化问题。 对于多输入单输出(MISO)情况,放宽问题的全局最优解是闭包的,也是原始问题的最优解。 通过轻微修改,封闭形式的MISO解决方案可以扩展到MIMO情况的解决方案,并且可以获得针对MIMO发射波束形成器设计的次优封闭形式的解决方案。
    • 34. 发明申请
    • BREAST CANCER DETECTION SYSTEM
    • 乳腺癌检测系统
    • WO2004073618A3
    • 2005-07-21
    • PCT/US2004004248
    • 2004-02-13
    • UNIV FLORIDALI JIAN
    • LI JIAN
    • A61B5/05
    • A61B5/0507A61B5/05
    • A method for detecting breast cancer can include the step of positioning a transmitting antenna and a receiving antenna about a breast so that the transmitting antenna is positioned to transmit microwave energy into the breast and the receiving antenna is positioned to receive the transmitted energy after the energy has passed into the breast. Microwave energy can be transmitted from the transmitting antenna. The microwave energy can be received by the receiving antenna and used to determine a presence of tumors within the breast. A relative position of the transmitting antenna and the receiving antenna can be adjusted about the breast. After each position adjustment , the transmitting and the receiving steps can be repeated.
    • 用于检测乳腺癌的方法可以包括将发射天线和接收天线定位在乳房周围的步骤,使得发射天线被定位成将微波能量传输到乳房中,并且接收天线被定位成在能量之后接收发射的能量 已经进入乳房。 微波能量可以从发射天线传输。 微波能量可以由接收天线接收并用于确定乳房内的肿瘤的存在。 可以相对于乳房调整发射天线和接收天线的相对位置。 在每个位置调整之后,可以重复发送和接收步骤。