公开(公告)号：US4075555A

公开(公告)日：1978-02-21

申请号：US781506

申请日：1977-03-25

申请人： James S. Wight ,  Walter J. Chudobiak ,  Vassilios Makios

发明人： James S. Wight ,  Walter J. Chudobiak ,  Vassilios Makios

IPC分类号： G01B7/06 ,  G01R25/02 ,  G01R27/04

CPC分类号： G01R25/02 ,  G01B7/06

摘要： A continuous wave, phase measurement system which provides at least an order of magnitude improvement in accuracy over modulated carrier systems is disclosed for the determination of the thicknesses of layered targets consisting of a known number of dielectric layers, each of a known maximum thickness. This system uses related frequencies such as the fundamental and its harmonics to establish a multi-harmonic coherence relationship whereby a homodyne phase reference between harmonics can be conserved and information extracted from just the received and not the transmitted signals. Consequently doppler effects due to motion between the target and the apparatus, as well as severe local oscillator stability and drift limitations are avoided, and thus this system can measure remote target parameters by interferometric techniques without the distance being a constraint.

公开(公告)号：US08949061B2

公开(公告)日：2015-02-03

申请号：US13182172

申请日：2011-07-13

申请人： Vajira Samarasooriya ,  Daniel Payer ,  James S. Wight

发明人： Vajira Samarasooriya ,  Daniel Payer ,  James S. Wight

IPC分类号： G06F19/00 ,  G01R29/26 ,  H04N17/02 ,  H04B1/76 ,  H04N5/50

CPC分类号： H04B1/76 ,  H04N5/50

摘要： A DTV pilot tone is detected in a noisy environment by computing a power average of Fast Fourier Transform (FFT) output spectra of a received signal, finding a power peak in the averaged outputs, computing an adjustment parameter to center the power peak in a Discrete Fourier Transform bin of the averaged output spectra, applying the adjustment parameter to adjust the received signal, computing a coherent average of FFT output spectra of the adjusted signal, and, testing a power spectrum of the coherent average for the presence of the DTV pilot tone.

摘要翻译： 在噪声环境中通过计算接收信号的快速傅里叶变换（FFT）输出频谱的功率平均值，找到平均输出中的功率峰值，计算调整参数以使功率峰值居中在离散值中，从而在噪声环境中检测DTV导频音 平均输出光谱的傅立叶变换仓，应用调整参数调整接收信号，计算调整信号的FFT输出光谱的相干平均值，以及测试DTV导频音的存在的相干平均的功率谱 。

公开(公告)号：US20130018622A1

公开(公告)日：2013-01-17

申请号：US13182172

申请日：2011-07-13

申请人： Vajira Samarasooriya ,  Daniel Payer ,  James S. Wight

发明人： Vajira Samarasooriya ,  Daniel Payer ,  James S. Wight

IPC分类号： G06F19/00 ,  G01R29/26

CPC分类号： H04B1/76 ,  H04N5/50

摘要： A DTV pilot tone is detected in a noisy environment by computing a power average of Fast Fourier Transform (FFT) output spectra of a received signal, finding a power peak in the averaged outputs, computing an adjustment parameter to center the power peak in a Discrete Fourier Transform bin of the averaged output spectra, applying the adjustment parameter to adjust the received signal, computing a coherent average of FFT output spectra of the adjusted signal, and, testing a power spectrum of the coherent average for the presence of the DTV pilot tone.

摘要翻译： 在噪声环境中通过计算接收信号的快速傅里叶变换（FFT）输出频谱的功率平均值，找到平均输出中的功率峰值，计算调整参数以使功率峰值居中在离散值中，从而在噪声环境中检测DTV导频音 平均输出光谱的傅立叶变换仓，应用调整参数调整接收信号，计算调整信号的FFT输出光谱的相干平均值，以及测试DTV导频音的存在的相干平均的功率谱 。

公开(公告)号：US20080009295A1

公开(公告)日：2008-01-10

申请号：US11482102

申请日：2006-07-07

申请人： Nicole Brousseau ,  Geoffrey Colman ,  James S. Wight

发明人： Nicole Brousseau ,  Geoffrey Colman ,  James S. Wight

IPC分类号： H04Q7/20

CPC分类号： H04W64/00

摘要： A high-accuracy method for the geolocation, without the collaboration of the network, of outdoor mobile emitters of a CDMA cellular system, based on the ability to distinguishing between line-of-sight and reflected signals. The method employs time-of-flight and angle-of-arrival information in order to determine whether a signal received by each of two or more interceptors situated at different locations is line-of-sight or reflected. Time-of-flight information is obtained with the aid of the reverse link of a mobile of interest. At those instances in time when the signal received at two or more interceptors is line-of-sight, the location of the mobile can be accurately determined using conventional direction-finding techniques. Since the signal received by an interceptor from a mobile may be very weak, adaptive threshold digital signal processing techniques may be employed to control the probability of detection and the probability of false alarms.

摘要翻译： 基于区分视线和反射信号的能力，用于CDMA蜂窝系统的室外移动发射器的地理定位的高精度方法，而不需要网络协作。 该方法采用飞行时间和到达角度信息，以便确定位于不同位置的两个或多个拦截器中的每一个接收的信号是否是视线或反射。 飞行时间信息是借助于感兴趣的移动台的反向链路获得的。 在两个或更多拦截器处接收到的信号是视线的时间的那些情况下，可以使用常规的寻找技术来精确地确定移动台的位置。 由于来自移动台的拦截器接收到的信号可能非常弱，所以可以采用自适应阈值数字信号处理技术来控制检测的概率和误报的可能性。

公开(公告)号：US06304230B1

公开(公告)日：2001-10-16

申请号：US09433569

申请日：1999-11-04

申请人： Gyles Panther ,  James S. Wight

发明人： Gyles Panther ,  James S. Wight

IPC分类号： H01Q2100

CPC分类号： H01Q1/3275 ,  H01Q7/00 ,  H01Q21/29

摘要： A loop antenna which is electrically small relative to a wavelength of a signal which it is designed to receive. The antenna is an electrically small, low profile, band switchable antenna which can be mounted on a metallic surface such as a truck or railway car rooftop and can be used to communicate with earth satellites. The antenna is polarized such that the plane containing the electric field is horizontal. Alternatively, the antenna can receive circularly polarized signals.

摘要翻译： 环形天线，其相对于被设计为接收的信号的波长是电小的。 该天线是一种电气小型，薄型，带可切换天线，可以安装在金属表面，如卡车或铁路车顶，可用于与地球卫星通信。 天线极化，使得包含电场的平面是水平的。 或者，天线可以接收圆偏振信号。

公开(公告)号：US6133882A

公开(公告)日：2000-10-17

申请号：US217903

申请日：1998-12-22

申请人： Philippe LaFleur ,  David Roscoe ,  James S. Wight

发明人： Philippe LaFleur ,  David Roscoe ,  James S. Wight

IPC分类号： H01Q1/38 ,  H01Q5/00 ,  H01Q9/04 ,  H01Q21/06

CPC分类号： H01Q21/065 ,  H01Q1/38 ,  H01Q5/385 ,  H01Q9/0414 ,  H01Q9/0428 ,  H01Q9/0457

摘要： An antenna array is disclosed wherein radiators are parasitically coupled to each other, forming an efficient feed network. Parasitic coupling of patches is arranged so that some patches are fed by a plurality of other patches which are parasitically coupled thereto. The resulting array is low profile and high gain. By positioning patches on different layers with different dimensions, a broadband design for the antenna array is achieved.

摘要翻译： 公开了一种天线阵列，其中散热器彼此寄生耦合，形成有效的馈电网络。 贴片的寄生耦合被布置成使得一些贴片由寄生耦合到其上的多个其它贴片馈送。 得到的阵列是低调和高增益。 通过将贴片定位在具有不同尺寸的不同层上，实现了天线阵列的宽带设计。