公开(公告)号：US20130230951A1

公开(公告)日：2013-09-05

申请号：US13860190

申请日：2013-04-10

Applicant: BAE Systems Information and Electronics Systems Integration Inc.

Inventor： Dong Xu ,  Xiaoping S. Yang ,  Wendell Kong ,  Lee M. Mohnkern ,  Phillip M. Smith ,  Pane-chane Chao

IPC: H01L29/66

CPC classification number: H01L29/66431 ,  H01L29/7784 ,  H01L29/7785

Abstract: A high-power and high-gain ultra-short gate HEMT device has exceptional gain and an exceptionally high breakdown voltage provided by an increased width asymmetric recess for the gate electrode, by a composite channel layer including a thin indium arsenide layer embedded in the indium gallium arsenide channel layer and by double doping through the use of an additional silicon doping spike. The improved transistor has an exceptional 14 dB gain at 110 GHz and exhibits an exceptionally high 3.5-4 V breakdown voltage, thus to provide high gain, high-power and ultra-high frequency in an ultra-short gate device.

Abstract translation: 高功率和高增益超短栅极HEMT器件具有特别的增益和由栅极电极的增加宽度不对称凹槽提供的异常高的击穿电压，通过复合沟道层，其包括嵌入在铟中的薄的砷化铟层 砷化镓沟道层，并通过使用额外的硅掺杂尖峰进行双掺杂。 改进的晶体管在110 GHz时具有超强的14 dB增益，并具有极高的3.5-4 V击穿电压，从而在超短栅极器件中提供高增益，大功率和超高频。

公开(公告)号：US20120100809A1

公开(公告)日：2012-04-26

申请号：US13343282

申请日：2012-01-04

Applicant: RAYMOND J. LACKEY

Inventor： RAYMOND J. LACKEY

IPC: H04B15/00

CPC classification number: H04L27/3863 ,  H03D1/04 ,  H04L27/3872

Abstract: A cosite interference cancellation system is provided for improved rejection of a signal coupled from a transmission antenna into a local receive antenna in the presence of local multipath. The cosite interference cancellation system and associated method advantageously provide improved signal rejection by continuously controlling (adjusting) a matching time delay to reduce cosite interference.

Abstract translation: 提供了一种相干干扰消除系统，用于在存在本地多路径的情况下改进对从发射天线耦合到本地接收天线的信号的抑制。 相干干扰消除系统和相关方法有利地通过连续控制（调整）匹配的时间延迟来减少干扰，从而提供改进的信号抑制。

公开(公告)号：US07920651B2

公开(公告)日：2011-04-05

申请号：US12491332

申请日：2009-06-25

Applicant: Thomas P McElwain

Inventor： Thomas P McElwain

IPC: H03D1/24

CPC classification number: H04B1/71055 ,  H03M13/2957 ,  H03M13/6331 ,  H03M13/6337 ,  H03M13/658 ,  H04B1/7107 ,  H04L1/005 ,  H04L25/0262 ,  H04L25/03178

Abstract: The system in one embodiment relates to tightly integrating parameter estimation, symbol hypothesis testing, decoding, and rate identification. The present invention provides Turbo-decoding for joint signal demodulation based on an iterative decoding solution that exploits error correction codes. The system iteratively couples an initial amplitude estimator, a symbol estimator, a bank of decoders, and a joint amplitude estimator to produce the symbol estimates.

Abstract translation: 一个实施例中的系统涉及紧密集成参数估计，符号假设检验，解码和速率识别。 本发明基于利用纠错码的迭代解码方案提供了用于联合信号解调的Turbo解码。 系统迭代地耦合初始振幅估计器，符号估计器，解码器组和联合振幅估计器以产生符号估计。

公开(公告)号：US20110059709A1

公开(公告)日：2011-03-10

申请号：US12555376

申请日：2009-09-08

Applicant: Thomas E. Collins, III

Inventor： Thomas E. Collins, III

IPC: H04B17/00 ,  H04B15/00

CPC classification number: H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0019 ,  H03D2200/0043 ,  H03D2200/0045 ,  H03D2200/0047 ,  H03D2200/0084 ,  H03D2200/0088

Abstract: Techniques are disclosed for optimization of RF converters. The techniques can be employed, for instance, in RF converters implemented in semiconductor materials (system-on-chip, or chip set) or with discrete components on a printed circuit board. In any such cases, the RF converter system can be configured with one or more actuators to adjust performance, one or more sensor to assess the performance (e.g., linearity of RF converter) and parameters of interest (e.g., ambient temperature, and a control block for controlling the sensors and actuators. The configuration allows the RF converter to autonomously self-optimize for linearity or other parameters of interest such as gain, noise figure, and dynamic range, across a broad range of variables.

Abstract translation: 公开了用于优化RF转换器的技术。 这些技术可以用于例如在半导体材料（片上系统或芯片组）中实施的RF转换器中，或者在印刷电路板上使用分立元件。 在任何这种情况下，RF转换器系统可以配置有一个或多个致动器来调整性能，一个或多个传感器来评估性能（例如，RF转换器的线性度）和感兴趣的参数（例如，环境温度和控制 用于控制传感器和执行器的模块，该配置允许RF转换器在广泛的变量范围内自主地优化线性度或其他感兴趣的参数，例如增益，噪声系数和动态范围。

公开(公告)号：US20100227622A1

公开(公告)日：2010-09-09

申请号：US12399730

申请日：2009-03-06

Applicant: Apurva N. Mody ,  Ranga Reddy

Inventor： Apurva N. Mody ,  Ranga Reddy

IPC: H04W72/00

CPC classification number: H04W16/10 ,  H04W72/04 ,  H04W74/0808 ,  H04W88/10

Abstract: Techniques are disclosed that allow for resource allocation during situations requiring co-existence in cognitive radios. Even under situations of bandwidth scarcity, the techniques allow various users to be guaranteed quality of service (QoS) by proper distribution and allocation of resources. The techniques allow wireless communication systems to operate in a normal mode and a co-existence mode. In the co-existence mode of operation, sub-frame creation, sharing and zone formation schemes are implemented that enable the existing underlying frame structure to remain intact and inter-operable with the legacy systems and at the same time, provide a guaranteed QoS. The zones effectively create partitions in space, time and frequency, which result in interference avoidance and allow various users in neighboring cells to communicate on the same frequencies.

Abstract translation: 公开了允许在认知无线电中需要共存的情况下进行资源分配的技术。 即使在带宽稀缺的情况下，这些技术允许通过适当的资源分配和分配来保证各种用户的服务质量（QoS）。 这些技术允许无线通信系统在正常模式和共存模式下操作。 在共存操作模式下，实现子帧创建，共享和区域形成方案，使得现有的底层帧结构保持完整并与传统系统互操作，并且同时提供有保证的QoS。 这些区域在空间，时间和频率上有效地创建分区，这导致干扰避免，并允许相邻小区中的各种用户在相同的频率上进行通信。

公开(公告)号：US20090296982A1

公开(公告)日：2009-12-03

申请号：US12469104

申请日：2009-05-20

Applicant: John T. Dolloff

Inventor： John T. Dolloff

IPC: G06K9/36

CPC classification number: G01C11/06 ,  G06T5/50

Abstract: A method for fusion of image block adjustments for the generation of a ground control network constituting a Metric Information Network (MIN). Utilizing the subject. fusion algorithm it is possible to duplicate the results of an extremely large simultaneous image block adjustment by sequentially performing smaller image block adjustments on small overlapping areas of interest and taking the results to update a metric information network. Note, intermediate results for less than all the imagery provide usable updates to the metric information network. The result of the infusion of sequential image block adjustments into the metric information network is that one can obtain the accuracy provided by an extremely large single image block adjustment, and do so in manageable chunks or segments involving conventional computer resources.

Abstract translation: 一种用于形成构成公制信息网络（MIN）的地面控制网络的图像块调整的融合方法。 利用主题。 融合算法可以通过在感兴趣的小重叠区域上顺序执行较小的图像块调整并且将结果更新为度量信息网络来复制非常大的同时图像块调整的结果。 注意，少于所有图像的中间结果提供了度量信息网络的可用更新。 将顺序图像块调整输入到度量信息网络的结果是可以获得由极大的单个图像块调整提供的精度，并且在可管理的块或涉及常规计算机资源的段中进行。

公开(公告)号：US06985282B2

公开(公告)日：2006-01-10

申请号：US10652544

申请日：2003-08-29

Applicant: Kevin J. Snell

Inventor： Kevin J. Snell

IPC: G02F1/39 ,  H01S3/109

CPC classification number: G02F1/39 ,  G02F2201/16

Abstract: The problem of the low efficiency of large quantum defect optical parametric oscillators is solved by recycling unused photons in a process involving pumping additional parametric processes having a common resonant wavelength. In order to improve the efficiency, a series of optical parametric oscillators are pumped with unused signal photons which exist at the output of a previous optical parametric oscillator that generates both signal and idler outputs, with the idler constituting the desired output.

Abstract translation: 大量子缺陷光参量振荡器的低效率的问题通过在涉及泵浦具有共同谐振波长的附加参数过程的过程中循环未使用的光子来解决。 为了提高效率，一系列光参量振荡器被泵浦，其中未使用的信号光子存在于先前的光参量振荡器的输出处，该参数振荡器产生信号和空载输出，空载器构成期望的输出。

公开(公告)号：US20050286603A1

公开(公告)日：2005-12-29

申请号：US10533321

申请日：2004-01-29

Applicant: Leonard Pomeranz

Inventor： Leonard Pomeranz

IPC: G02F1/39 ,  H01S3/00 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/117 ,  H01S3/16

CPC classification number: H01S3/117 ,  G02F1/39 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/094038 ,  H01S3/09415 ,  H01S3/1616 ,  H01S3/1638

Abstract: A Thulium laser (15) is used to directly drive a ZnGeP2 optical parametric oscillator (30) with a nominal 2 μm output to generate the 3-5 micron wavelengths. In one embodiment, the ZGP OPO is configured as a linear resonator and in another embodiment the ZGP OPO is configured as a ring resonator. The ring resonator prevents optical feedback to the Thulium laser (15) and eliminates the need for an optical isolator (24). Moreover, the Thulium laser pump (15) is implemented as a Tm:YAlO3 laser in which YAlO is the host for the Thulium YAlO is particularly beneficial as it is a mechanically hard optical material allowing high thermal loading without fracture as well as natural birefringence that can minimize thermal birefringence losses. A longer wavelength transition at 1.99 microns is selected to minimize nonlinear crystal loss. More particularly, a high power, high efficiency Tm:YAlO3 laser repetitively Q-switched at 10 kHz is used to drive a ZnGeP2 OPO. The system is run with room temperature components and achieves over 3 W at 3-5 microns with an efficiency of 5% starting from the pump diode. A two crystal resonator (40, 42) design allows tuning over multiple spectral peaks or alternately as an ultra broad spectral source.

Abstract translation: 钍激光器（15）用于直接驱动具有标称2um输出的ZnGeP 2/2光参量振荡器（30）以产生3-5微米波长。 在一个实施例中，ZGP OPO被配置为线性谐振器，在另一个实施例中，ZGP OPO被配置为环形谐振器。 环形谐振器防止光学反馈到钍激光器（15），并且不需要光隔离器（24）。 此外，钍激光泵（15）实现为Tm：YAlO 3 N 3激光器，其中YAlO是铊的主体YAlO是特别有利的，因为它是允许高热负荷的机械硬光学材料 没有断裂以及可以最小化热双折射损失的天然双折射。 选择1.99微米的较长波长转变以最小化非线性晶体损耗。 更具体地，使用以10kHz重复Q开关的高功率，高效率的Tm：YAlO 3 N 3激光器来驱动ZnGeP 2 OPO。 该系统采用室温元件运行，从泵浦二极管开始，效率为5％，达到3-5微米3 W以上。 两个晶体谐振器（40,42）设计允许在多个光谱峰上进行调谐，或者交替地调谐为超广谱光源。

公开(公告)号：US06965521B2

公开(公告)日：2005-11-15

申请号：US10631174

申请日：2003-07-31

Applicant: Bin Li ,  Kenneth R. Knowles ,  David C. Lawson

Inventor： Bin Li ,  Kenneth R. Knowles ,  David C. Lawson

IPC: G11C11/00 ,  G11C16/02 ,  G11C16/26

CPC classification number: G11C13/0004 ,  G11C13/0038 ,  G11C13/004

Abstract: A read/write circuit for accessing chalcogenide non-volatile memory cells is disclosed. The read/write circuit includes a chalcogenide storage element, a voltage limiting circuit, a current-to-voltage converter, and a buffer circuit. The voltage limiting circuit, which is coupled to the chalcogenide storage element, ensures that voltages across the chalcogenide storage element will not exceed a predetermined value during a read operation. During a read operation, the current-to-voltage converter, which is coupled to the voltage limiting circuit, converts a current pulse read from the chalcogenide storage element to a voltage pulse. By sensing the voltage pulse from the current-to-voltage converter, the buffer circuit can determine a storage state of the chalcogenide storage element.

公开(公告)号：US10345144B2

公开(公告)日：2019-07-09

申请号：US15646624

申请日：2017-07-11

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Mark L Oskotsky ,  Michael J Russo, Jr.

IPC: G01J3/02 ,  G01J3/04

Abstract: A Compact and Athermal VNIR/SWIR Spectrometer utilizes a slit, a Mangin lens, a pupil lens adjacent to the diffraction grating, corrector lenses, a beam splitter, field lenses and SWIR and VNIR FPAs. In examples, two corrector lenses are used. Some examples do not utilize field lenses and beam splitter, some examples utilize only the SWIR radiation spectrum. By balancing the powers of the optical elements and Abbe numbers of glasses as well as usage of aspheric surfaces combinations, a monochromatic and polychromatic aberrational correction is achieved; by balancing optical elements refractive indices change with temperature an athermalization is achieved. The overall length of the spectrometer does not exceed 4 inches, and in some examples it is 2.5 inches. A wide field of view and a low F number are obtained with an operating wavelength range from approximately 400 to 2350 nm. The spectrometer is particularly suited to airborne applications.