公开(公告)号：US07215715B2

公开(公告)日：2007-05-08

申请号：US09900087

申请日：2001-07-06

申请人： Ahmad Chini ,  Hossein Alavi ,  Mohammad Reza Movahedin

发明人： Ahmad Chini ,  Hossein Alavi ,  Mohammad Reza Movahedin

IPC分类号： H04K1/02 ,  H04K1/10

CPC分类号： H04L27/2626 ,  H04L27/2644

摘要： A system and method of controlling the spectrum of an orthogonal frequency division multiplexing (OFDM) signal. The method comprises receiving an input frame of data samples to be modulated onto orthogonal multi-carrier signals, performing frequency domain filtering and spectrum masking on the input frame of data samples, and modulating the respective frequency modified data samples onto a plurality of carriers. Such a system may include an over sampling logic to over sample the input data to increase the frequency resolution of the output spectrum, a wave shaping filter to perform frequency domain filtering of the input data, a spectrum mask to further modify the spectrum of the output signal, and an inverse fast Fourier transform (IFFT) to generate the modulated orthogonal multi-carrier signal. Another embodiment entails controlling the spectrum of the output OFDM signal by performing time-domain filtering.

摘要翻译： 一种控制正交频分复用（OFDM）信号的频谱的系统和方法。 该方法包括接收要调制到正交多载波信号上的数据采样的输入帧，对数据采样的输入帧执行频域滤波和频谱掩蔽，并将各个频率修正的数据样本调制到多个载波上。 这样的系统可以包括过采样逻辑以对输入数据进行过采样以增加输出频谱的频率分辨率，波形整形滤波器以对输入数据进行频域滤波，频谱掩模以进一步修改输出的频谱 信号和快速傅里叶逆变换（IFFT），以产生调制的正交多载波信号。 另一个实施例需要通过执行时域滤波来控制输出OFDM信号的频谱。

公开(公告)号：US07020095B2

公开(公告)日：2006-03-28

申请号：US09883554

申请日：2001-06-16

申请人： Ahmad Chini ,  Javad Omidi ,  Hossein Alavi

发明人： Ahmad Chini ,  Javad Omidi ,  Hossein Alavi

IPC分类号： H04J1/16

CPC分类号： H04L27/2618

摘要： For one aspect of the invention, a method is described for mitigating power spectral density irregularities in a multi-carrier modulation environment. The method involves identifying at least one carrier of a plurality of carriers that is in a non-data bearing state. Thereafter, that carrier is modulated with random data.

公开(公告)号：US06985072B2

公开(公告)日：2006-01-10

申请号：US10028078

申请日：2001-12-21

申请人： Mohammad Javad Omidi ,  Hossein Alavi ,  Ahmad Chini ,  Mohammad Reza Movadhedin

发明人： Mohammad Javad Omidi ,  Hossein Alavi ,  Ahmad Chini ,  Mohammad Reza Movadhedin

IPC分类号： H04M11/04

CPC分类号： H04L1/0083 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5445 ,  H04B2203/5454 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0071 ,  H04L1/0072

摘要： In one embodiment, a system and method for receiving information over a power line in accordance with the HomePlug specification is described. The receiver side of the method involves separation of the data within a payload of an incoming frame into a plurality of blocks. Thereafter, both frame control symbols and data within the blocks are processed by Frame Control Forward Error Correction (FEC) decoding logic.

公开(公告)号：US07564800B2

公开(公告)日：2009-07-21

申请号：US11386396

申请日：2006-03-22

申请人： Ahmad Chini ,  Javad Omidi ,  Hossein Alavi

发明人： Ahmad Chini ,  Javad Omidi ,  Hossein Alavi

IPC分类号： H04J1/16

CPC分类号： H04L27/2618

摘要： For one aspect of the invention, a method is described for mitigating power spectral density irregularities in a multi-carrier modulation environment. The method involves identifying at least one carrier of a plurality of carriers that is in a non-data bearing state. Thereafter, that carrier is modulated with random data.

公开(公告)号：US20060227699A1

公开(公告)日：2006-10-12

申请号：US11386396

申请日：2006-03-22

申请人： Ahmad Chini ,  Javad Omidi ,  Hossein Alavi

发明人： Ahmad Chini ,  Javad Omidi ,  Hossein Alavi

IPC分类号： H04J11/00 ,  H04J1/00

CPC分类号： H04L27/2618

摘要： For one aspect of the invention, a method is described for mitigating power spectral density irregularities in a multi-carrier modulation environment. The method involves identifying at least one carrier of a plurality of carriers that is in a non-data bearing state. Thereafter, that carrier is modulated with random data.

公开(公告)号：US06983029B2

公开(公告)日：2006-01-03

申请号：US09940381

申请日：2001-08-27

申请人： Hossein Alavi ,  Mohammad Javad Omidi ,  Mehdi Tavassoli Kilani ,  Ahmad Chini

发明人： Hossein Alavi ,  Mohammad Javad Omidi ,  Mehdi Tavassoli Kilani ,  Ahmad Chini

IPC分类号： H03D3/22 ,  H04L27/22

CPC分类号： H04L27/2647 ,  H04L1/20 ,  H04L27/22

摘要： In general, one embodiment of the invention relates to a method for detecting data bits and estimating the channel reliability of each carrier. The detection method comprises (i) computing a complex phase difference between a current symbol and a previous symbol, (ii) separating a real value component (R) from a corresponding imaginary value component (I) forming the complex phase difference, (iii) determining at least one boundary constraint line of a complex phase map for a selected demodulation scheme, and computing an arithmetic combination of the real value component and the corresponding imaginary value component to detect whether a series of bits falls within a selected region of the complex phase map defined by the at least one boundary constraint line. Over N symbols propagating over a carrier, including the current symbol and the previous symbol, the channel estimation counts a number of symbols (less than N but greater than a threshold) that fall within an estimated area of the complex phase map. The estimated area is bound by boundary constraint lines based on a parameterized real value component.

公开(公告)号：US06912262B1

公开(公告)日：2005-06-28

申请号：US09939424

申请日：2001-08-24

申请人： Ahmad Chini ,  Hossein Alavi ,  Mehdi T. Kilani ,  Mohammad J. Omidi

发明人： Ahmad Chini ,  Hossein Alavi ,  Mehdi T. Kilani ,  Mohammad J. Omidi

IPC分类号： H04B1/707 ,  H04L7/04 ,  H04L27/26 ,  H04L7/00

CPC分类号： H04B1/7102 ,  H04L7/027 ,  H04L7/04 ,  H04L27/2662 ,  H04L27/2675

摘要： A method and apparatus for time-shift extraction in a wideband transmitted signal containing strong narrowband interference or noise. The time-shift extraction is based on the time domain and frequency domain relation of symbol misalignment. The invention uses the sign of the product of a recieved signal sample and a reference symbol in the frequency domain to determine the time-shift. It does not rely on the signal magnitude and is therefore less dependent on the signal gain. It also does not rely on the soft phase values, which have ambiguity for values more than three hundred sixty (360) degrees.

摘要翻译： 一种用于在包含强窄带干扰或噪声的宽带发射信号中进行时移提取的方法和装置。 时移提取是基于符号未对准的时域和频域关系。 本发明使用接收信号样本和频域中的参考符号的乘积的符号来确定时移。 它不依赖于信号幅度，因此较少依赖于信号增益。 它也不依赖于软相位值，它们对于超过三百六十（360）度的值具有模糊性。

公开(公告)号：US08019007B2

公开(公告)日：2011-09-13

申请号：US11865735

申请日：2007-10-02

申请人： Surendra Boppana ,  Masoud Sajadieh ,  Hossein Alavi

发明人： Surendra Boppana ,  Masoud Sajadieh ,  Hossein Alavi

IPC分类号： H04K1/10

CPC分类号： H04L27/2647 ,  H04B1/123

摘要： Device, system, and method of flicker noise mitigation. For example, an apparatus includes a digital adaptive filter to mitigate flicker noise from a received Orthogonal Frequency-Division Multiplexing (OFDM) signal, wherein the digital adaptive filter includes: a prediction filter to estimate a value of the flicker noise based on linear combination of past low-pass filtered signal samples; a trainer sub-circuit to modify a coefficient of the prediction filter based on a difference between: a known incoming signal filtered by the prediction filter in a training stage, and a locally-generated reference copy of the known signal; a first path including a first pair of analysis-synthesis filters; and a second, parallel, path including a second pair of analysis-synthesis filters and further including the prediction filter.

摘要翻译： 闪烁噪声抑制的装置，系统和方法。 例如，一种装置包括数字自适应滤波器，用于从接收到的正交频分复用（OFDM）信号中减轻闪烁噪声，其中数字自适应滤波器包括：预测滤波器，用于基于线性组合的线性组合来估计闪烁噪声的值 过去的低通滤波信号样本; 基于在训练阶段由预测滤波器滤波的已知输入信号和已知信号的本地生成的参考副本之间的差异来修改预测滤波器的系数的训练器子电路; 包括第一对分析合成滤波器的第一路径; 以及包括第二对分析合成滤波器并且还包括所述预测滤波器的第二并行路径。

公开(公告)号：US06799193B2

公开(公告)日：2004-09-28

申请号：US10022465

申请日：2001-12-14

申请人： Mehdi T. Kilani ,  Hossein Alavi

发明人： Mehdi T. Kilani ,  Hossein Alavi

IPC分类号： G06F1715

CPC分类号： H04L7/042 ,  H04L7/08

摘要： One aspect of the invention provides a novel scheme to synchronize signal reception for a receiver device. In one embodiment, multi-symbol correlation of a first signal and a reference signal is performed. The reference signal corresponds to symbols denoting a synchronization or alignment marker. For every first signal sample, an indication of the degree of similarity between a plurality of the first signal symbols and reference signal symbols is generate as a second signal. This second signal is then nonlinearly processed, linearly processed, and then nonlinearly processed over time to determine if indications of high degrees of correlation occur at periodic intervals. If so, then these are considered synchronization markers and are used to synchronize signal reception of the receiver device.

摘要翻译： 本发明的一个方面提供了一种用于使接收机设备的信号接收同步的新方案。 在一个实施例中，执行第一信号和参考信号的多符号相关。 参考信号对应于表示同步或对准标记的符号。 对于每个第一信号样本，生成多个第一信号符号和参考信号符号之间的相似程度的指示作为第二信号。 然后对该第二信号进行非线性处理，线性处理，然后随时间非线性处理，以确定是否在周期性间隔发生高度相关的指示。 如果是这样，那么这些被认为是同步标记，并且用于同步接收器设备的信号接收。

公开(公告)号：US20140092238A1

公开(公告)日：2014-04-03

申请号：US13630661

申请日：2012-09-28

申请人： Sumeet SANDHU ,  Hossein Alavi ,  Ehud Reshef

发明人： Sumeet SANDHU ,  Hossein Alavi ,  Ehud Reshef

IPC分类号： H04N7/18

CPC分类号： G01J1/0271 ,  G01J1/0219 ,  G01J1/0233 ,  G01J1/0403 ,  G01J1/0488 ,  G01J1/1626 ,  G01J1/4228 ,  G01J1/429 ,  G01J1/50 ,  G01J2001/0257

摘要： The present application discloses device and system embodiments that address mobile device integration considerations for various categories of UV sensors, including cameras, photodiodes, and chemical sensors. The UV sensors may use the functionalities of the existing in-built sensors in conventional mobile devices, and/or integrate additional components specific to UV sensing. By optimally positioning the sensors, UV sensing and other collateral functionalities (e.g., charging a photovoltaic cell integrated with the mobile device) can be realized in parallel.

摘要翻译： 本申请公开了解决针对各种UV传感器（包括照相机，光电二极管和化学传感器）的移动设备集成考虑的设备和系统实施例。 UV传感器可以使用常规移动设备中现有的内置传感器的功能，和/或集成特定于UV感测的附加组件。 通过最佳地定位传感器，可以并行实现UV感测和其它辅助功能（例如，与移动设备集成的光伏电池的充电）。