公开(公告)号：US07493143B2

公开(公告)日：2009-02-17

申请号：US09850520

申请日：2001-05-07

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04M1/00

CPC分类号： H04W72/082 ,  H04B7/0491 ,  H04B7/10

摘要： According to a disclosed embodiment, a first plurality of pilot signals of a first polarization is received and ranked. Subsequently, a second plurality of pilot signals of a second polarization is received and ranked. Following, a pilot signal from the first and second pluralities of pilot signals is selected based on a signal quality measurement such as a signal to interference ratio. Moreover, a system can be constructed comprising antennas configured to receive pilot signals of a first and a second polarization. The system further comprises a receiver configured to demodulate the pilot signals and a CPU configured to rank the pilot signals and to select a pilot signal based on a signal quality measurement. Communication quality is improved by communicating with the base transceiver station transmitting the pilot signal providing the highest signal quality measurement.

公开(公告)号：US20080160992A1

公开(公告)日：2008-07-03

申请号：US11771927

申请日：2007-06-29

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04Q7/20

CPC分类号： H04B7/18534 ,  H04B7/0808 ,  H04B7/0814

摘要： A wireless communication device (WCD) used as a satellite telephone is provided with multiple antennas for communicating with its satellites. If signal quality is determined to be poor, then an evaluation is made as to whether switching antennas will result in an improvement in the communication link between the WCD and the satellite.

摘要翻译： 用作卫星电话的无线通信设备（WCD）设置有用于与其卫星进行通信的多个天线。 如果确定信号质量差，则进行关于切换天线是否将导致WCD与卫星之间的通信链路的改善的评估。

公开(公告)号：US20080122706A1

公开(公告)日：2008-05-29

申请号：US11739887

申请日：2007-04-25

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H01Q1/28 ,  G01R29/08

CPC分类号： H04B7/18504

摘要： Aeronautical broadband communication is enhanced by providing an apparatus having a first antenna configured to communicate using a signal orientation corresponding to a first polarization, and a second antenna configured to communicate using a signal orientation corresponding to a second polarization, where the second polarization has at least one characteristic difference from the first polarization. Additional antennas may be used, where multiple antennas share one polarization, and multiple other antennas share a different polarization, and signals from like-polarized antennas are combined for beam-formation.

摘要翻译： 通过提供具有第一天线的装置来增强航空宽带通信，所述第一天线被配置为使用与第一极化相对应的信号方向进行通信，以及第二天线，被配置为使用与第二极化对应的信号取向进行通信，其中第二极化具有至少 与第一极化有一个特征差异。 可以使用附加的天线，其中多个天线共享一个极化，并且多个其它天线共享不同的极化，并且组合来自相同极化天线的信号用于波束形成。

公开(公告)号：US07362268B2

公开(公告)日：2008-04-22

申请号：US11165281

申请日：2005-06-22

申请人： Michael James Wengler ,  Ahmad Jalali

发明人： Michael James Wengler ,  Ahmad Jalali

IPC分类号： G01S3/16

CPC分类号： G01S19/21 ,  G01S5/0215 ,  G01S19/36 ,  G01S2013/466 ,  H04B7/0854

摘要： A method for detecting a plurality of navigation beacon signals by using either two antennas or a synthetic aperture antenna for receiving a plurality of distinct measurements, and combining the plurality of distinct measurements using a plurality of antenna weight components to form an interference cancellation beam. In one embodiment, the plurality of antenna weight components is determined by eigenvalue processing. In another embodiment, the plurality of antenna weight components is determined by simplified processing. In another aspect, a single antenna is used for receiving an originally received measurement. A copy of the originally received measurement is made and processed to achieve the proper time delay to emulate spatial diversity. The originally received measurement and the processed copy are combined to form an interference cancellation beam.

摘要翻译： 一种用于通过使用两个天线或合成孔径天线来接收多个不同测量来检测多个导航信标信号的方法，以及使用多个天线权重分量组合所述多个不同测量以形成干扰消除波束。 在一个实施例中，多个天线权重分量由特征值处理确定。 在另一个实施例中，通过简化的处理来确定多个天线权重分量。 在另一方面，单个天线用于接收原始接收的测量。 进行原始接收的测量的副本并进行处理以实现适当的时间延迟来模拟空间分集。 原始接收的测量和处理的拷贝被组合以形成干扰消除波束。

公开(公告)号：US07349481B2

公开(公告)日：2008-03-25

申请号：US10356425

申请日：2003-01-30

申请人： Jack Steentra ,  Ahmad Jalali

发明人： Jack Steentra ,  Ahmad Jalali

IPC分类号： H04K1/00

CPC分类号： H04L27/2602 ,  H04L27/2626 ,  H04L27/2647

摘要： An apparatus and method for communication using sound waves is disclosed. More particularly, orthogonal frequency division multiplexing scheme is used to transmit and receive digital data on sound waves. In one embodiment, the sound waves are used to exchange information. In another aspect, the sound waves are used to authenticate an individual or device.

摘要翻译： 公开了一种使用声波进行通信的装置和方法。 更具体地，正交频分复用方案用于在声波上发送和接收数字数据。 在一个实施例中，声波用于交换信息。 在另一方面，声波用于认证个人或设备。

公开(公告)号：US20060256009A1

公开(公告)日：2006-11-16

申请号：US11165281

申请日：2005-06-22

申请人： Michael Wengler ,  Ahmad Jalali

发明人： Michael Wengler ,  Ahmad Jalali

IPC分类号： G01S3/16 ,  G01S3/02

CPC分类号： G01S19/21 ,  G01S5/0215 ,  G01S19/36 ,  G01S2013/466 ,  H04B7/0854

摘要： A method for detecting a plurality of navigation beacon signals by using either two antennas or a synthetic aperture antenna for receiving a plurality of distinct measurements, and combining the plurality of distinct measurements using a plurality of antenna weight components to form an interference cancellation beam. In one embodiment, the plurality of antenna weight components is determined by eigenvalue processing. In another embodiment, the plurality of antenna weight components is determined by simplified processing. In another aspect, a single antenna is used for receiving an originally received measurement. A copy of the originally received measurement is made and processed to achieve the proper time delay to emulate spatial diversity. The originally received measurement and the processed copy are combined to form an interference cancellation beam.

摘要翻译： 一种用于通过使用两个天线或合成孔径天线来接收多个不同测量来检测多个导航信标信号的方法，以及使用多个天线权重分量组合所述多个不同测量以形成干扰消除波束。 在一个实施例中，多个天线权重分量由特征值处理确定。 在另一个实施例中，通过简化的处理来确定多个天线权重分量。 在另一方面，单个天线用于接收原始接收的测量。 进行原始接收的测量的副本并进行处理以实现适当的时间延迟来模拟空间分集。 原始接收的测量和处理的拷贝被组合以形成干扰消除波束。

公开(公告)号：US20060223587A1

公开(公告)日：2006-10-05

申请号：US11182236

申请日：2005-07-15

申请人： Ivan Fernandez-Corbaton ,  Ahmad Jalali ,  Ernest Ozaki ,  Harris Simon ,  Sherman Gregory

发明人： Ivan Fernandez-Corbaton ,  Ahmad Jalali ,  Ernest Ozaki ,  Harris Simon ,  Sherman Gregory

IPC分类号： H04M1/00

CPC分类号： H01Q25/00

摘要： At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver. In another implementation, a first signal is transmitted to a first receiver and is also transmitted to a second receiver with a time delay.

公开(公告)号：US20060223573A1

公开(公告)日：2006-10-05

申请号：US11182295

申请日：2005-07-15

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04M1/00

CPC分类号： H04W36/0055 ,  H04W16/24 ,  H04W16/28 ,  H04W36/0083 ,  H04W84/06 ,  H04W88/02

摘要： One implementation provides a novel station-to-station handoff using an adaptive or directional antenna. The directional antenna generates a plurality of directional search beams to search for pilot signals from new base stations. The search beams are scanned one beam at a time to obtain the relative direction of all new base stations detected. From the detected base stations, a new base station with the strongest signal strength is selected and compared to the currently used base station. If the new base station has stronger signal strength than the current base station, then a communication handoff from the current base station to the new base station is initiated. In one feature of the present invention, two directional beams are used to communicate with the current and new base stations. Once a communication link is established with the new base station, the directional beam to the current base station is terminated.

摘要翻译： 一种实现方式提供使用自适应或定向天线的新颖的站间站切换。 定向天线产生多个方向搜索波束以搜索来自新基站的导频信号。 搜索光束一次扫描一个光束，以获得检测到的所有新基站的相对方向。 从检测到的基站，选择具有最强信号强度的新基站，并将其与当前使用的基站进行比较。 如果新基站具有比当前基站更强的信号强度，则从当前基站到新基站的通信切换开始。 在本发明的一个特征中，使用两个定向波束与当前和新的基站进行通信。 一旦与新基站建立通信链路，终止对当前基站的定向波束。

公开(公告)号：US20060088007A1

公开(公告)日：2006-04-27

申请号：US11297244

申请日：2005-12-07

申请人： Ahmad Jalali ,  Jay Walton ,  Mark Wallace

发明人： Ahmad Jalali ,  Jay Walton ,  Mark Wallace

IPC分类号： H04Q7/00

CPC分类号： H04L5/023

摘要： Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).

摘要翻译： 发射机和接收机单元，用于OFDM通信系统并可配置为支持多种类型的业务。 发射机单元包括一个或多个编码器，符号映射元件和调制器。 每个编码器接收和编码相应的信道数据流以生成对应的编码数据流。 符号映射元件接收并映射来自编码数据流的数据以产生调制符号向量，其中每个调制符号向量包括用于调制一组音调以生成OFDM符号的一组数据值。 调制器调制调制符号向量以提供适于传输的调制信号。 来自每个编码数据流的数据被映射到一个或多个“电路”的相应集合。 每个电路可以被定义为包括来自多个OFDM符号的多个音调，来自单个OFDM符号的多个音调，来自一个或多个OFDM符号的所有音调，或一些其它音调组合。 电路可以具有相同的尺寸或不同的尺寸。 不同的电路可以用于全速率数据（例如，活动语音）和低速率数据（例如，静默时段）。

公开(公告)号：US20060087972A1

公开(公告)日：2006-04-27

申请号：US11297853

申请日：2005-12-08

申请人： Ahmad Jalali ,  Ivan Corbaton

发明人： Ahmad Jalali ,  Ivan Corbaton

IPC分类号： H04L12/26

CPC分类号： H04L5/006 ,  H04L1/0002 ,  H04L1/0021 ,  H04L1/0023 ,  H04L1/1819 ,  H04L5/0007 ,  H04L5/0046 ,  Y02D50/10

摘要： Techniques to determine the rate for a data transmission in an OFDM system. The maximum data rate that may be reliably transmitted over a given multipath (non-flat) channel by the OFDM system is determined based on a metric for an equivalent (flat) channel. For the given multipath channel and a particular rate (which may be indicative of a particular data rate, modulation scheme, and coding rate), the metric is initially derived from an equivalent data rate and the particular modulation scheme. A threshold SNR needed to reliably transmit the particular data rate using the particular modulation scheme and coding rate is then determined. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR. Incremental transmission is used to account for errors in the determined data rate.