公开(公告)号：US20120294398A1

公开(公告)日：2012-11-22

申请号：US13110470

申请日：2011-05-18

Applicant: Tevfik Yucek ,  Sundar G. Sankaran ,  Paul Petrus

Inventor： Tevfik Yucek ,  Sundar G. Sankaran ,  Paul Petrus

IPC: H04L27/08

CPC classification number: H03M1/186 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/435 ,  H03F2200/78 ,  H03G3/3052 ,  H04B1/109

Abstract: System and method for detecting radio frequency (RF) saturation in a wireless device configured to simultaneously receive first signals according to a first wireless protocol and second signals according to a second wireless protocol. Signals having components of both the first and second signals may be received at a shared gain element. A level of saturation of the shared gain element may be determined. A current definition of a saturation event may be determined. A gain adjustment value may be determined based on the level of saturation and the current definition of a saturation event. A gain value of the shared gain element may be adjusted by the determined gain adjustment value.

Abstract translation: 根据第二无线协议，根据第一无线协议和第二信号同时接收第一信号的无线设备中检测射频（RF）饱和度的系统和方法。 具有第一和第二信号的分量的信号可以在共享增益元件处被接收。 可以确定共享增益元件的饱和电平。 可以确定饱和事件的当前定义。 可以基于饱和度的水平和饱和度事件的当前定义来确定增益调整值。 可以通过所确定的增益调整值来调整共享增益元件的增益值。

公开(公告)号：US09065688B2

公开(公告)日：2015-06-23

申请号：US13526499

申请日：2012-06-18

Applicant: Vincent K. Jones ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Tevfik Yucek ,  Santosh Paul Abraham

Inventor： Vincent K. Jones ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Tevfik Yucek ,  Santosh Paul Abraham

IPC: H04W72/04 ,  H04L27/00 ,  H04W16/14 ,  H04W4/02 ,  H04W28/16 ,  G01S1/00 ,  H04H20/42 ,  H04W48/16 ,  H04H60/41 ,  H04H60/51

CPC classification number: H04L27/0006 ,  G01S1/00 ,  H04H20/42 ,  H04H60/41 ,  H04H60/51 ,  H04W4/02 ,  H04W16/14 ,  H04W28/16 ,  H04W48/16

Abstract: A method includes determining, at an electronic device, information associated with a location of the first electronic device. An initial set of television white space channels is filtered based on the information to generate a search set of television white space channels. A passive scan of the search set of television white space channels is performed at the electronic device to identify a television white space access point.

Abstract translation: 一种方法包括在电子设备处确定与第一电子设备的位置相关联的信息。 基于该信息对初始的电视白空间信道进行滤波，以产生电视白空间信道的搜索集。 在电子设备处执行电视空白频道的搜索集的被动扫描以识别电视空白接入点。

公开(公告)号：US08831155B2

公开(公告)日：2014-09-09

申请号：US13479210

申请日：2012-05-23

Applicant: Tevfik Yucek ,  Kai Shi ,  Susinder Rajan Gulasekaran ,  Richard Melvin Mosko, Jr.

Inventor： Tevfik Yucek ,  Kai Shi ,  Susinder Rajan Gulasekaran ,  Richard Melvin Mosko, Jr.

IPC: H04L27/08

CPC classification number: G01S7/021 ,  H04K3/226 ,  H04K3/822 ,  H04K2203/18 ,  H04L27/2633

Abstract: A method of identifying radar in a wireless device includes detecting an event corresponding to receipt of a signal by the wireless device. The event can include an analog to digital converter (ADC) saturation, a radio frequency (RF) saturation, and/or an ADC power high condition. Notably, the gain change in the wireless device is delayed for a first predetermined time period. Data preceding the event for the first predetermined time period can be buffered. A first low-resolution fast Fourier transform (FFT), wherein low-resolution FFTs are referred to as short FFTs, can be performed with the buffered data. The first short FFT can be processed. When results of the processing indicate the signal is radar, the radar can then be identified.

Abstract translation: 一种在无线设备中识别雷达的方法包括：检测与无线设备接收的信号相对应的事件。 该事件可以包括模数转换器（ADC）饱和，射频（RF）饱和和/或ADC功率高电平状态。 值得注意的是，无线设备中的增益改变延迟了第一预定时间段。 可以缓冲在第一预定时间段之前的事件之前的数据。 可以使用缓冲的数据来执行第一低分辨率快速傅里叶变换（FFT），其中低分辨率FFT被称为短FFT。 可以处理第一个短FFT。 当处理结果表明信号是雷达时，可以识别雷达。

公开(公告)号：US20130223357A1

公开(公告)日：2013-08-29

申请号：US13526499

申请日：2012-06-18

Applicant: Vincent K. Jones ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Tevfik Yucek ,  Santosh Paul Abraham

Inventor： Vincent K. Jones ,  Hemanth Sampath ,  Stephen J. Shellhammer ,  Tevfik Yucek ,  Santosh Paul Abraham

IPC: H04W72/04

CPC classification number: H04L27/0006 ,  G01S1/00 ,  H04H20/42 ,  H04H60/41 ,  H04H60/51 ,  H04W4/02 ,  H04W16/14 ,  H04W28/16 ,  H04W48/16

Abstract: A method includes determining, at an electronic device, information associated with a location of the first electronic device. An initial set of television white space channels is filtered based on the information to generate a search set of television white space channels. A passive scan of the search set of television white space channels is performed at the electronic device to identify a television white space access point.

Abstract translation: 一种方法包括在电子设备处确定与第一电子设备的位置相关联的信息。 基于该信息对初始的电视白空间信道进行滤波，以产生电视白空间信道的搜索集。 在电子设备处执行电视空白频道的搜索集的被动扫描以识别电视空白接入点。

公开(公告)号：US20120115416A1

公开(公告)日：2012-05-10

申请号：US12940623

申请日：2010-11-05

Applicant: Tevfik Yucek ,  Sundar G. Sankaran ,  Paul Petrus

Inventor： Tevfik Yucek ,  Sundar G. Sankaran ,  Paul Petrus

IPC: H04B7/00 ,  H04B1/06

CPC classification number: H04B1/406 ,  H04B1/109

Abstract: Limiting gain for simultaneously receiving first wireless signals according to a first wireless protocol and second wireless signals according to a second wireless protocol. The first signals may be received using a shared gain element. The shared gain element may be used by the first wireless protocol and the second wireless protocol. A transmission or reception of the second signals may be predicted. The transmission or reception of the second signals may be predicted for transmission or reception while receiving the first signals. Gain of the shared gain element may be limited based on the prediction.

Abstract translation: 根据第一无线协议同时接收第一无线信号的限制增益和根据第二无线协议的第二无线信号。 可以使用共享增益元件来接收第一信号。 共享增益元件可以由第一无线协议和第二无线协议使用。 可以预测第二信号的发送或接收。 可以在接收第一信号的同时预测发送或接收第二信号的发送或接收。 可以基于预测来限制共享增益元素的增益。

公开(公告)号：US08774858B2

公开(公告)日：2014-07-08

申请号：US13110470

申请日：2011-05-18

Applicant: Tevfik Yucek ,  Sundar G. Sankaran ,  Paul Petrus

Inventor： Tevfik Yucek ,  Sundar G. Sankaran ,  Paul Petrus

IPC: H04B1/06 ,  H04B7/00 ,  H04M1/00

CPC classification number: H03M1/186 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/435 ,  H03F2200/78 ,  H03G3/3052 ,  H04B1/109

Abstract: System and method for detecting radio frequency (RF) saturation in a wireless device configured to simultaneously receive first signals according to a first wireless protocol and second signals according to a second wireless protocol. Signals having components of both the first and second signals may be received at a shared gain element. A level of saturation of the shared gain element may be determined. A current definition of a saturation event may be determined. A gain adjustment value may be determined based on the level of saturation and the current definition of a saturation event. A gain value of the shared gain element may be adjusted by the determined gain adjustment value.

Abstract translation: 根据第二无线协议，根据第一无线协议和第二信号同时接收第一信号的无线设备中检测射频（RF）饱和度的系统和方法。 具有第一和第二信号的分量的信号可以在共享增益元件处被接收。 可以确定共享增益元件的饱和电平。 可以确定饱和事件的当前定义。 可以基于饱和度的水平和饱和度事件的当前定义来确定增益调整值。 可以通过所确定的增益调整值来调整共享增益元件的增益值。

公开(公告)号：US08160163B1

公开(公告)日：2012-04-17

申请号：US12187035

申请日：2008-08-06

Applicant: Tevfik Yucek ,  Huseyin Arslan

Inventor： Tevfik Yucek ,  Huseyin Arslan

IPC: H04K1/10

CPC classification number: H04W16/14 ,  H04L27/0006

Abstract: Spectrum sensing is one of the most challenging problems in cognitive radio systems. The spectrum of interest needs to be characterized and unused frequencies should be identified for possible exploitation in a simple and fast way, allowing the radio to catch up with the changing transmission parameters. A sensing method is presented where primary users are identified by matching the features extracted from the received signal to the a priori information about primary users' transmission characteristics. For estimation of some signal parameters, the cyclostationarity of the transmission spectrum is explored by using a suboptimal maximum likelihood (ML) estimator. The proposed algorithms can be used in cognitive radio for identifying various transmissions and for electronic surveillance.

Abstract translation: 频谱感知是认知无线电系统中最具挑战性的问题之一。 需要对频谱进行表征，并以简单快速的方式识别未使用的频率以便可能的开发，从而使无线电能够赶上变化的传输参数。 提出了一种感测方法，其中主要用户通过将从接收到的信号提取的特征与关于主要用户的传输特性的先验信息进行匹配来识别。 为了估计一些信号参数，通过使用次优最大似然（ML）估计器来探索传输频谱的周期平稳性。 所提出的算法可用于认知无线电中，用于识别各种传输和电子监视。

公开(公告)号：US08149685B2

公开(公告)日：2012-04-03

申请号：US11162245

申请日：2005-09-02

Applicant: Tevfik Yucek ,  Huseyin Arslan

Inventor： Tevfik Yucek ,  Huseyin Arslan

IPC: H04J11/00

CPC classification number: H04L27/2607 ,  H04J11/0063 ,  H04J13/0003 ,  H04K1/10 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/03866 ,  H04L27/2605 ,  H04L27/2613 ,  H04L27/2655

Abstract: Methods for secure OFDM communications include changing the length of OFDM symbols in a pseudo-random fashion by appending a totally random signal to some of the OFDM symbols. An adaptive cyclic prefix is provided for covert and spectrally efficient communication. A developed PN based random data addition provides further security by removing the chance of combining synchronization information over several OFDM symbols.

Abstract translation: 用于安全OFDM通信的方法包括通过将全随机信号附加到一些OFDM符号来以伪随机方式改变OFDM符号的长度。 为隐蔽和频谱有效的通信提供了自适应循环前缀。 开发的基于PN的随机数据附加通过消除在几个OFDM符号上组合同步信息的机会来提供进一步的安全性。

公开(公告)号：US07688905B1

公开(公告)日：2010-03-30

申请号：US11428473

申请日：2006-07-03

Applicant: Tevfik Yucek ,  Huseyin Arslan

Inventor： Tevfik Yucek ,  Huseyin Arslan

IPC: H04K1/10

CPC classification number: H04B1/1027 ,  H04B17/345 ,  H04L27/2647

Abstract: In accordance with the present invention, a method and apparatus for estimating the noise and interference over the transmission band for OFDM systems are provided. Noise variance and signal-to-noise ratio (SNR) are important parameters for adaptive orthogonal frequency division multiplexing (OFDM) systems since they serve as a standard measure of signal quality. Conventional algorithms assume that the noise statistics remain constant over the OFDM frequency band, and thereby average the instantaneous noise samples to get a single estimate. In reality, noise is often made up of white Gaussian noise along with correlated colored noise that affects the OFDM spectrum unevenly. Provided is an adaptive windowing technique to estimate the noise power that takes into account the variation of the noise statistics across the OFDM sub-carrier index as well as across OFDM symbols. The proposed method provides many local estimates, allowing tracking of the variation of the noise statistics in frequency and time. A mean-squared-error (MSE) expression in order to choose the optimal window dimensions for averaging in time and frequency is derived.

Abstract translation: 根据本发明，提供了一种用于估计OFDM系统的传输频带上的噪声和干扰的方法和装置。 噪声方差和信噪比（SNR）是自适应正交频分复用（OFDM）系统的重要参数，因为它们用作信号质量的标准测量。 传统算法假定噪声统计在OFDM频带上保持恒定，从而平均瞬时噪声样本以获得单个估计。 实际上，噪声通常由白高斯噪声以及影响OFDM频谱不均匀的相关色噪声组成。 提供了一种自适应加窗技术来估计考虑到OFDM子载波索引以及跨越OFDM符号的噪声统计的变化的噪声功率。 所提出的方法提供了许多局部估计，允许跟踪噪声统计在频率和时间上的变化。 导出了平均误差（MSE）表达式，以便选择用于在时间和频率上求平均的最优窗口维数。

公开(公告)号：US08489024B1

公开(公告)日：2013-07-16

申请号：US12913512

申请日：2010-10-27

Applicant: Tevfik Yucek ,  Qinghai Gao ,  Sundar G. Sankaran ,  Susinder R. Gulasekaran

Inventor： Tevfik Yucek ,  Qinghai Gao ,  Sundar G. Sankaran ,  Susinder R. Gulasekaran

IPC: B04B7/00

CPC classification number: H04W72/02 ,  H04W72/10 ,  H04W88/06

Abstract: Arbitration between two wireless protocols in a wireless device. The wireless device may include first wireless protocol circuitry, configured to receive and process first signals according to a first wireless protocol and second wireless protocol circuitry, configured to receive and process second signals according to a second wireless protocol. The wireless device may also include coexistence circuitry. The coexistence circuitry may be configured to receive a request from the first wireless protocol circuitry to perform transmission or reception and arbitrate the requested transmission or reception between the first wireless protocol circuitry and the second wireless protocol circuitry. The decision may be based on current or future priority information, current configuration, or other factors. The coexistence circuitry (or other circuitry) may be configured to determine position of switches controlling antennas or transmission using shared or unshared antennas (or chains). The two wireless protocols may be WLAN and Bluetooth.

Abstract translation: 无线设备中的两个无线协议之间的仲裁。 无线设备可以包括第一无线协议电路，被配置为根据第一无线协议和第二无线协议电路来接收和处理第一信号，第二无线协议电路被配置为根据第二无线协议接收和处理第二信号。 无线设备还可以包括共存电路。 共存电路可以被配置为接收来自第一无线协议电路的请求以执行传输或接收，并且仲裁第一无线协议电路和第二无线协议电路之间的所请求的传输或接收。 该决定可以基于当前或将来的优先级信息，当前配置或其他因素。 共存电路（或其他电路）可以被配置为使用共享或非共享天线（或链）来确定控制天线或传输的交换机的位置。 两种无线协议可以是WLAN和蓝牙。