公开(公告)号：US07397844B2

公开(公告)日：2008-07-08

申请号：US11267070

申请日：2005-11-03

Applicant: John E. Smee ,  Ahmad Jalali

Inventor： John E. Smee ,  Ahmad Jalali

IPC: H04B1/00

CPC classification number: H04B7/0854 ,  H04B1/7115 ,  H04L25/03019 ,  H04L2025/03617 ,  H04L2025/03662 ,  H04L2025/03777

Abstract: In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized within an equalizer to generate symbol estimates, which may be subsequently processed (e.g., despread and decovered) to provide a first stream of recovered symbols. Each sample stream is filtered with a set of coefficients and may be scaled with a scaling factor. The scaled samples for all streams are then combined to generate the symbol estimates. The sample stream(s) may also be processed by a second processing scheme with one or more rake receivers to provide a second stream of recovered symbols. The signal quality for each processing scheme can be estimated and used to select either the first or second processing scheme.

Abstract translation: 在用于实现更高S / N的方法中，接收和处理一个或多个信号以提供一个或多个采样流。 在第一处理方案中，在均衡器内均衡采样流以产生符号估计，其可以随后被处理（例如，解扩和解复用）以提供恢复符号的第一流。 用一组系数对每个采样流进行滤波，并可以用缩放因子进行缩放。 然后将所有流的缩放样本组合以生成符号估计。 样本流也可以由具有一个或多个耙式接收器的第二处理方案来处理，以提供第二回收符号流。 可以估计每个处理方案的信号质量并用于选择第一或第二处理方案。

公开(公告)号：US07379750B2

公开(公告)日：2008-05-27

申请号：US11182295

申请日：2005-07-15

Applicant: Ahmad Jalali

Inventor： Ahmad Jalali

IPC: H04M1/00 ,  H04Q7/20

CPC classification number: H04W36/0055 ,  H04W16/24 ,  H04W16/28 ,  H04W36/0083 ,  H04W84/06 ,  H04W88/02

Abstract: 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.

Abstract translation: 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：US20080107048A1

公开(公告)日：2008-05-08

申请号：US11963016

申请日：2007-12-21

Applicant: Ahmad Jalali ,  John Smee ,  Mark Wallace

Inventor： Ahmad Jalali ,  John Smee ,  Mark Wallace

IPC: H04J3/00

CPC classification number: H04L1/0032 ,  H04B7/0434 ,  H04B7/0626 ,  H04L1/0003 ,  H04L1/0013 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/06 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.

Abstract translation: 在时分双工（TDD）通信系统中处理用于传输的数据的技术。 在一个方面，基于来自终端的反向链路传输（例如，导频）在基站处估计前向链路的频率响应。 在前向链路上的数据传输之前，基站基于终端发送的导频来确定反向传递函数，使用校准函数“校准”反向传递函数来导出正向传递函数的估计，以及前提条件 基于从前向传递函数导出的权重的调制符号。 在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。 然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得所发送的数据能够以期望的性能水平由终端接收。

公开(公告)号：US07324836B2

公开(公告)日：2008-01-29

申请号：US10670078

申请日：2003-09-23

Applicant: Jack Steenstra ,  Paul E. Jacobs ,  Ahmad Jalali

Inventor： Jack Steenstra ,  Paul E. Jacobs ,  Ahmad Jalali

IPC: H04B1/38 ,  H04M1/00

CPC classification number: H04M1/72527 ,  H04B1/3805 ,  H04M1/6058

Abstract: Method and apparatus are disclosed to allow non-wireless transmission or reception of data from one device to at least another device. More particularly, in one embodiment, a jack of a first device is configured to receive incoming analog signals encoded with digital data from the second device and to transmit outgoing analog signals encoded with digital data to the second device. The first device may also comprise a first conversion unit configured to encode digital data into the outgoing analog signals and a second conversion unit configured to recover digital data from the incoming analog signals.

Abstract translation: 公开了允许从一个设备到至少另一个设备的数据的非无线传输或接收的方法和装置。 更具体地，在一个实施例中，第一设备的插座被配置为接收来自第二设备的以数字数据编码的输入模拟信号，并将输出的用数字数据编码的模拟信号发送到第二设备。 第一设备还可以包括被配置为将数字数据编码为输出模拟信号的第一转换单元和被配置为从输入的模拟信号中恢复数字数据的第二转换单元。

公开(公告)号：US20070168825A1

公开(公告)日：2007-07-19

申请号：US11518329

申请日：2006-09-07

Applicant: Ahmad Jalali ,  Eduardo Esteves ,  Nagabhushana Sindhushayana ,  Peter Black ,  Rashid Attar

Inventor： Ahmad Jalali ,  Eduardo Esteves ,  Nagabhushana Sindhushayana ,  Peter Black ,  Rashid Attar

IPC: H04L1/18 ,  G08C25/02

CPC classification number: H04L1/1887 ,  H04L1/1692 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/1877 ,  H04L1/188

Abstract: A method and an apparatus for quick retransmission of signals in a communication system are disclosed. A transmitting terminal, e.g., a base station, transmits signals in a form of packets to a receiving terminal, e.g., a subscriber station. The receiving terminal determines if the packet was intended for the receiving terminal, and if so, the receiving terminal demodulates the packet. The receiving terminal then computes a quality metric of the packet, and compares the computed quality metric with a quality metric contained in the packet. If the quality metrics match, the packet is declared correctly received, and is forwarded for further processing. If the quality metrics fail to match, the receiving terminal sends a request for retransmission of the packet. The transmitting terminal determines which packet needs to be retransmitted based on the request for retransmission. The transmitting terminal then schedules the packet for retransmission.

Abstract translation: 公开了一种在通信系统中快速重发信号的方法和装置。 发送终端（例如基站）以分组的形式向接收终端（例如，用户台）发送信号。 接收终端确定分组是否用于接收终端，如果是，则接收终端解调分组。 接收终端然后计算分组的质量度量，并将计算的质量度量与分组中包含的质量度量进行比较。 如果质量度量匹配，则报文被正确地接收，并被转发用于进一步的处理。 如果质量度量不匹配，则接收终端发送分组请求。 发送终端根据重传请求确定哪个分组需要重传。 然后，发送终端调度分组进行重传。

公开(公告)号：US07099384B1

公开(公告)日：2006-08-29

申请号：US09654177

申请日：2000-09-01

Applicant: Ahmad Jalali ,  John Smee ,  Parag Agashe

Inventor： Ahmad Jalali ,  John Smee ,  Parag Agashe

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04W52/343 ,  H04B7/005 ,  H04B7/0617 ,  H04W52/40

Abstract: In a CDMA data communication system capable of variable rate data transmission, a time-division power assignment cyclically reduces the carrier power level to at least one sector to reduce interference in neighboring sectors. The base station determines a time-division power assignment for each sector and generates signals according to the power assignment. The mobile unit generates filter coefficients corresponding to each power level. The mobile unit estimates Carrier Signal-to-Interference (C/I) to determine a data rate for each power level. Previous iterations of the equalizer are stored and used to refine future estimates.

Abstract translation: 在能够进行可变速率数据传输的CDMA数据通信系统中，时分功率分配循环地将载波功率电平降低到至少一个扇区，以减少相邻扇区的干扰。 基站确定每个扇区的时分功率分配，并根据功率分配产生信号。 移动单元产生对应于每个功率电平的滤波器系数。 移动单元估计载波信号到干扰（C / I）以确定每个功率电平的数据速率。 均衡器的先前迭代被存储并用于改进未来的估计。

公开(公告)号：US06694469B1

公开(公告)日：2004-02-17

申请号：US09549017

申请日：2000-04-14

Applicant: Ahmad Jalali ,  Eduardo A. S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

Inventor： Ahmad Jalali ,  Eduardo A. S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

IPC: G08C2502

CPC classification number: H04L1/1887 ,  H04L1/1692 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/1877 ,  H04L1/188

Abstract: A method and an apparatus for quick retransmission of signals in a communication system are disclosed. A transmitting terminal, e.g., a base station, transmits signals in a form of packets to a receiving terminal, e.g., a subscriber station. The receiving terminal determines if the packet was intended for the receiving terminal, and if so, the receiving terminal demodulates the packet. The receiving terminal then computes a quality metric of the packet, e.g., a cyclic redundancy check, and compares the computed quality metric with a quality metric contained in the packet. If the quality metrics match, the packet is declared correctly received, and is forwarded for further processing. If the quality metrics fail to match, the receiving terminal sends a request for retransmission of the packet. The transmitting terminal determines which packet needs to be retransmitted based on the request for retransmission. The transmitting terminal then schedules the packet for retransmission. If delivery of the packet in accordance with the aforementioned description fails, retransmission in accordance with conventional sequence-number-based schemes, e.g., radio link protocol, is attempted.

Abstract translation: 公开了一种在通信系统中快速重发信号的方法和装置。 发送终端（例如基站）以分组的形式向接收终端（例如，用户台）发送信号。 接收终端确定分组是否用于接收终端，如果是，则接收终端解调分组。 接收终端然后计算分组的质量度量，例如循环冗余校验，并将计算的质量度量与分组中包含的质量度量进行比较。 如果质量度量匹配，则报文被正确地接收，并被转发用于进一步的处理。 如果质量度量不匹配，则接收终端发送分组请求。 发送终端根据重传请求确定哪个分组需要重传。 然后，发送终端调度分组进行重传。 如果根据上述描述的分组的传送失败，则尝试根据常规的基于序列号的方案，例如无线电链路协议进行重传。

公开(公告)号：US06515975B1

公开(公告)日：2003-02-04

申请号：US09296974

申请日：1999-04-22

Applicant: Ashvin Chheda ,  Ahmad Jalali

Inventor： Ashvin Chheda ,  Ahmad Jalali

IPC: H04Q700

CPC classification number: H04W52/40 ,  H04W24/10 ,  H04W28/18 ,  H04W36/18

Abstract: Disclosed is an apparatus for and method of increasing the stability of a CDMA cellular system using fast forward power control. This is accomplished by improving the relative power level synchronization of all the BTSs communicating with an MS in a handoff mode through the use of at least one of 1) setting the power levels of any BTS other than the BTS having the best measured Eb/No (bit energy to noise density) of reverse link FPC (forward power control) bit stream transmissions from said MS, hereinafter BTS(x), to a power level which is a function of the power level of BTS(x), 2) adjusting at least one of lower and upper limits of traffic channel gain of a BTS as a function of whether or not said given MS is in a handoff mode and 3) adjusting at least one of the incremental FPC (forward power control) and RPC (reverse power control) parameters as a function of the number of BTSs in a soft handoff mode with respect to said MS.

Abstract translation: 公开了一种使用快进功率控制来增加CDMA蜂窝系统的稳定性的装置和方法。 这是通过使用以下中的至少一种来改善与MS在切换模式中通信的所有BTS的相对功率电平同步：1）设置除了具有最佳测量的Eb / No的BTS之外的任何BTS的功率电平 来自所述MS（以下称为BTS（x））的反向链路FPC（正向功率控制）比特流传输（作为BTS（x）的功率电平的函数）的功率电平的（位能量与噪声密度）2）调整 作为所述给定MS是否处于切换模式的功能的BTS的业务信道增益的下限和上限中的至少一个，以及3）调整增量FPC（正向功率控制）和RPC（反向）中的至少一个 功率控制）参数作为关于所述MS的软切换模式中的BTS的数量的函数。

公开(公告)号：US06473467B1

公开(公告)日：2002-10-29

申请号：US09539224

申请日：2000-03-30

Applicant: Mark Wallace ,  Jay R. Walton ,  Ahmad Jalali

Inventor： Mark Wallace ,  Jay R. Walton ,  Ahmad Jalali

IPC: H04B702

CPC classification number: H04B7/0417 ,  H04B7/043 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0673 ,  H04B7/08 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/0029 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0091 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/08 ,  H04W52/42

Abstract: Channel state information (CSI) can be used by a communications system to precondition transmissions between transmitter units and receiver units. In one aspect of the invention, disjoint sub-channel sets are assigned to transmit antennas located at a transmitter unit. Pilot symbols are generated and transmitted on a subset of the disjoint sub-channels. Upon receipt of the transmitted pilot symbols, the receiver units determine the CSI for the disjoint sub-channels that carried pilot symbols. These CSI values are reported to the transmitter unit, which will use these CSI values to generate CSI estimates for the disjoint sub-channels that did not carry pilot symbols. The amount of information necessary to report CSI on the reverse link can be further minimized through compression techniques and resource allocation techniques.

Abstract translation: 信道状态信息（CSI）可以被通信系统用于预处理发射机单元和接收机单元之间的传输。 在本发明的一个方面，将不相交的子信道集分配给位于发射机单元的发射天线。 导频符号在不相交的子信道的子集上生成和发送。 在接收到所发送的导频符号之后，接收机单元确定携带导频符号的不相交子信道的CSI。 这些CSI值被报告给发射机单元，其将使用这些CSI值来生成不携带导频符号的不相交子信道的CSI估计。 可以通过压缩技术和资源分配技术进一步最小化反向链路上报告CSI所需的信息量。

公开(公告)号：US06181738B2

公开(公告)日：2001-01-30

申请号：US09023849

申请日：1998-02-13

Applicant: Ashvin Chheda ,  Ahmad Jalali

Inventor： Ashvin Chheda ,  Ahmad Jalali

IPC: H04B346

CPC classification number: H04W52/267 ,  H04B2201/70703 ,  H04W52/24

Abstract: When the frame rate changes from eighth rate to full rate, the power control process increases the Eb/No target by &Dgr;1. If the frame rate changes from full rate to eighth rate, the power control process decreases the Eb/No target by &Dgr;2. In both cases, a decision threshold for a Frame Quality Metric is determined. If the Frame Quality Metric is less than the threshold, normal power control is resumed. If the Frame Quality Metric is greater than or equal to the threshold, the newly set target Eb/No is decreased by A3. The target Eb/No is continually decreased by A until the frame rate changes or the target reaches the required Eb/No, indicated by a bad frame or lower frame quality metric (i.e., lower than the frame quality threshold).

Abstract translation: 当帧速率从第八速率变为全速时，功率控制过程通过DELTA1增加Eb / No目标。 如果帧速率从全速率变化到第八速率，则功率控制过程通过DELTA2降低Eb / No目标。 在这两种情况下，确定帧质量度量的判定阈值。 如果帧质量度量值小于阈值，则恢复正常的功率控制。 如果帧质量度量值大于或等于阈值，新设定的目标Eb / No将减少A3。 目标Eb / No连续减少A，直到帧速率变化或目标达到所需的Eb / No，由不良帧或较低帧质量度量（即低于帧质量阈值）指示。