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1. 发明申请

US20070178927A1 Centralized medium access control algorithm for CDMA reverse link 失效
标题翻译： CDMA反向链路的集中式媒体接入控制算法
公开(公告)号：US20070178927A1
公开(公告)日：2007-08-02
申请号：US11441651
申请日：2006-05-25
申请人： Ivan Fernandez-Corbaton , Ahmad Jalali , Jordi Pinos Pont
发明人： Ivan Fernandez-Corbaton , Ahmad Jalali , Jordi Pinos Pont
IPC分类号： H04B7/00 , H04Q7/20
CPC分类号： H04W52/343 , H04W52/367
摘要： A novel MAC algorithm is disclosed having various features for a modern CDMA interference-shared reverse link, including (a) link quality assurance, (b) individual congestion control, (c) variable data rate transition policy, and/or (d) reverse link partitioning. Link quality assurance is provided by monitoring transmission feedback information (ACK/NACK) to indirectly determine the quality of a communication link. Wireless devices are individually targeted to perform congestion control of the reverse link. Variable data transmission rates and discontinuous transmissions are achieved by individual wireless devices that autonomously adjust their transmission rate and transmit power. The reverse link can also be partitioned among the different wireless devices by individually controlling the transmit power of the wireless devices operating on the reverse link.
摘要翻译：公开了一种新颖的MAC算法，其具有用于现代CDMA干扰共享反向链路的各种特征，包括（a）链路质量保证，（b）个体拥塞控制，（c）可变数据速率转换策略和/或（d）反向链接分区。通过监视传输反馈信息（ACK / NACK）来间接地确定通信链路的质量来提供链路质量保证。无线设备被单独定向以执行反向链路的拥塞控制。可变数据传输速率和不连续传输通过自主调整其传输速率和传输功率的各个无线设备实现。也可以通过单独控制在反向链路上操作的无线设备的发射功率，在不同的无线设备之间对反向链路进行分区。

2. 发明申请

US20060223587A1 Antenna array pattern distortion mitigation 有权
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.

3. 发明申请

US20050201335A1 Access channel with constrained arrival times 失效
标题翻译：访问频道具有约束到达时间
公开(公告)号：US20050201335A1
公开(公告)日：2005-09-15
申请号：US10952970
申请日：2004-09-28
申请人： Ivan Fernandez-Corbaton , Franklin Antonio , Leonard Schiff , Ahmad Jalali
发明人： Ivan Fernandez-Corbaton , Franklin Antonio , Leonard Schiff , Ahmad Jalali
IPC分类号： H04W74/04 , H04B1/707 , H04Q7/00 , H04B7/216
CPC分类号： H04W56/0005 , H04J13/16
摘要： Systems, methods and apparatus for configuring and accessing a random access channel in a CDMA communication system are disclosed. The number of users supported by a random access channel can be optimized by assigning a distinct time of arrival to each of a plurality of users. Each of the users can be time synchronized and can transmit data at a time that compensates for a propagation delay to allow the data to arrive at the destination receiver at the assigned time. In a CDMA system, each of the users can transmit data that is spread with the same spreading code, provided the cross correlation properties of the code are sufficient to allow identification of a source that is time offset relative to another user. The time of arrival can be determined based on the number of active users, and can be assigned as often as each transmission by each user.
摘要翻译：公开了用于在CDMA通信系统中配置和访问随机接入信道的系统，方法和装置。可以通过向多个用户中的每一个分配不同的到达时间来优化随机接入信道支持的用户数量。每个用户可以是时间同步的，并且可以在补偿传播延迟的时间发送数据，以允许数据在分配的时间到达目的地接收机。在CDMA系统中，如果代码的互相关属性足以允许识别相对于另一个用户的时间偏移的源，那么每个用户可以发送用相同的扩展码扩展的数据。可以基于活动用户的数量来确定到达时间，并且可以分配给每个用户每次发送的频率。

4. 发明申请

US20060274823A1 Parameter estimator with dynamically variable integration time 有权
公开(公告)号：US20060274823A1
公开(公告)日：2006-12-07
申请号：US11501451
申请日：2006-08-08
申请人： Jeremy Stein , Ivan Fernandez-Corbaton , Roland Rick , Borislav Ristic , Ashok Bhatia , Messay Amerga
发明人： Jeremy Stein , Ivan Fernandez-Corbaton , Roland Rick , Borislav Ristic , Ashok Bhatia , Messay Amerga
IPC分类号： H04B1/00 , H04L27/06
CPC分类号： G01S19/24 , G01S5/0215 , G01S5/0221 , G01S19/21 , G01S19/31 , G01S19/46
摘要： A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.

5. 发明授权

US06697417B2 System and method of estimating earliest arrival of CDMA forward and reverse link signals 有权
标题翻译：估计CDMA前向和反向链路信号的最早到达的系统和方法
公开(公告)号：US06697417B2
公开(公告)日：2004-02-24
申请号：US09919626
申请日：2001-07-27
申请人： Ivan Fernandez-Corbaton , Nadav Levanon
发明人： Ivan Fernandez-Corbaton , Nadav Levanon
IPC分类号： H04B1707
CPC分类号： H04B1/7115 , H04B1/7113 , H04B1/7117
摘要： A method for estimating the earliest signal arrival in a wireless communication system is presented. The system includes a base station that transmits a plurality of pilot signals and a mobile station configured to receive a plurality of signals corresponding to the pilot signals. The mobile station includes a receiver containing a searcher correlation mechanism and at least one finger correlation mechanism. The mobile station receiver detects the arrival times and energy levels of the received signals and constructs a searcher histogram and a finger histogram associated with each pilot signal. Each of the searcher and finger histograms represents an arrival time distribution of samples corresponding to the received signals. The mobile station receiver processes samples contained within each of the searcher histograms and the finger histograms to generate a plurality of estimated early signal arrivals. The earliest signal arrival is determined from the plurality of estimated early signal arrivals.
摘要翻译：提出了一种估计无线通信系统中最早信号到达的方法。该系统包括发送多个导频信号的基站和被配置为接收对应于导频信号的多个信号的移动台。该移动站包括一个包含搜索器相关机制和至少一个手指相关机构的接收机。移动站接收机检测接收到的信号的到达时间和能级，并且构建与每个导频信号相关联的搜索器直方图和手指直方图。搜索器和手指直方图中的每一个表示对应于接收信号的采样的到达时间分布。移动站接收机处理包含在每个搜索器直方图和手指直方图中的样本以产生多个估计的早期信号到达。从多个估计的早期信号到达确定最早的信号到达。

6. 发明授权

US07729412B2 Parameter estimator with dynamically variable integration time 有权
标题翻译：具有动态变量积分时间的参数估计器
公开(公告)号：US07729412B2
公开(公告)日：2010-06-01
申请号：US10057689
申请日：2002-01-24
申请人： Jeremy M. Stein , Ivan Fernandez-Corbaton , Roland R. Rick , Borislav Ristic , Ashok Bhatia , Messay Amerga
发明人： Jeremy M. Stein , Ivan Fernandez-Corbaton , Roland R. Rick , Borislav Ristic , Ashok Bhatia , Messay Amerga
IPC分类号： H04B1/69 , H04L27/06
CPC分类号： G01S19/24 , G01S5/0215 , G01S5/0221 , G01S19/21 , G01S19/31 , G01S19/46
摘要： A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.
摘要翻译：描述了用于使用动态变化的积分时间从从信号导出的相关函数中估计一个或多个参数的参数估计器。可以在用户台中使用参数估计器来估计无线通信系统中的一个或多个基站或扇区导频信号的到达时间。该信息可以用于用于估计用户台的位置的总体高级前向链路三边测量（AFLT）过程。

7. 发明授权

US07558534B2 Reliability metrics for parameter estimates which account for cumulative error 失效
标题翻译：考虑到累积误差的参数估计的可靠性指标
公开(公告)号：US07558534B2
公开(公告)日：2009-07-07
申请号：US10125182
申请日：2002-04-17
申请人： Jeremy Stein , Ivan Fernandez-Corbaton , Roland R. Rick , Messay Amerga
发明人： Jeremy Stein , Ivan Fernandez-Corbaton , Roland R. Rick , Messay Amerga
IPC分类号： H04B17/00 , H04M1/00
CPC分类号： H04W64/00 , G01S5/0205 , G01S5/0215
摘要： A method of producing a reliability metric for a parameter estimate derived from a signal using correlation analysis is described. The method begins by obtaining an indication of whether a non line of sight signal condition is present or likely and/or obtaining an indication of whether a multi-path signal condition is present or likely. Responsive to one or both of these indications, the method derives a reliability metric for the parameter estimate. In one embodiment, the parameter estimate is an estimate of time of arrival (TOA) of the signal, and the reliability metric is root mean square error (RMSE) of the time of arrival estimate. This embodiment obtains an indication of whether a non line of sight signal condition is present or likely based on a measure of the strength of the correlation function at the peak thereof. The measure of the strength of the correlation function at the peak thereof may be energy per chip divided by total received power (Ec/I0) or may simply be the raw energy of the correlation function at the peak. The RMSE metric which is computed in this embodiment varies inversely with the peak strength of the correlation function.
摘要翻译：描述了使用相关性分析来生成从信号导出的参数估计的可靠性度量的方法。该方法通过获得视线信号条件是否存在或可能存在和/或获得多径信号状况是否存在或可能的指示开始。响应于这些指示中的一个或两个，该方法导出参数估计的可靠性度量。在一个实施例中，参数估计是信号的到达时间（TOA）的估计，可靠性度量是到达时间估计的均方根误差（RMSE）。该实施例基于在其峰值处的相关函数的强度的度量来获得是否存在非线视觉信号条件或可能的指示。峰值处的相关函数的强度的度量可以是每个芯片的能量除以总接收功率（Ec / I0），或者可以简单地是峰值处的相关函数的原始能量。在本实施例中计算的RMSE度量与相关函数的峰值强度成反比变化。

8. 发明申请

US20070104150A1 Transmission structure supporting multi-user scheduling and MIMO transmission 有权
标题翻译：支持多用户调度和MIMO传输的传输结构
公开(公告)号：US20070104150A1
公开(公告)日：2007-05-10
申请号：US11502882
申请日：2006-08-10
申请人： Ivan Fernandez-Corbaton , Josef Blanz , Wolfgang Granzow
发明人： Ivan Fernandez-Corbaton , Josef Blanz , Wolfgang Granzow
IPC分类号： H04B7/216
CPC分类号： H04J11/003 , H04B1/7107 , H04B1/7176 , H04B7/2618 , H04B2201/70703 , H04J13/00 , H04J13/16 , H04L5/0023 , H04W72/12
摘要： Techniques for transmitting data in a manner to support multi-user scheduling, multiple-input multiple-output (MIMO) transmission, and interference cancellation are described. A base station assigns multiple time segments of a transmission time interval (TTI) to at least one terminal, maps data for each terminal to at least one time segment assigned to the terminal, and spreads the data in each time segment with at least one channelization code used in the TTI. A terminal receives an assignment of at least one time segment from among multiple time segments of the TTI, obtains input samples for the at least one time segment, and despreads the input samples with the at least one channelization code used in the TTI.
摘要翻译：描述了以支持多用户调度，多输入多输出（MIMO）传输和干扰消除的方式发送数据的技术。基站向至少一个终端分配传输时间间隔（TTI）的多个时间段，将每个终端的数据映射到分配给终端的至少一个时间段，并且在每个时间段中传播具有至少一个信道化的数据 TTI中使用的代码。终端从TTI的多个时间段中接收至少一个时间段的分配，获得至少一个时间段的输入采样，并且用TTI中使用的至少一个信道化码解扩输入的采样。

9. 发明申请

US20060239238A1 Techniques for facilitating communication handoffs 有权
标题翻译：促进沟通切换的技术
公开(公告)号：US20060239238A1
公开(公告)日：2006-10-26
申请号：US11394062
申请日：2006-03-29
申请人： Ivan Fernandez-Corbaton , Jordi de los Pinos , Leonard Schiff , Sherman Gregory
发明人： Ivan Fernandez-Corbaton , Jordi de los Pinos , Leonard Schiff , Sherman Gregory
IPC分类号： H04B7/216
CPC分类号： H04W36/32 , H04B7/01 , H04B7/18506 , H04W16/28 , H04W52/0206 , H04W52/267 , H04W52/325 , H04W52/367 , H04W52/40 , H04W52/50 , Y02D70/164 , Y02D70/44 , Y02D70/446
摘要： Various schemes are provided that facilitate a communication handoff from a current base station to a target base station. One feature provides for reducing the search space that a base station searches by providing it with the position/location and/or velocity of an access terminal with which it attempts to communicate. Having the position and/or velocity of the access terminal, a current or target base station is able to reduce its search space (e.g., direction, frequency range, and/or time window) for the access terminal. Another feature provides for selectively and gradually increasing the power of a pilot signal originating from the access terminal during the handoff acquisition period to a target base station. By increasing the pilot signal power, the base station has a better chance of acquiring the signal and do so more quickly.
摘要翻译：提供了有助于从当前基站到目标基站的通信切换的各种方案。一个特征提供了通过向基站提供与其尝试通信的接入终端的位置/位置和/或速度来减少基站搜索的搜索空间。具有接入终端的位置和/或速度，当前或目标基站能够减少接入终端的搜索空间（例如方向，频率范围和/或时间窗）。另一个特征提供了在切换获取周期期间将源自接入终端的导频信号的功率选择性地逐渐增加到目标基站。通过增加导频信号功率，基站有更好的获取信号的机会并且更快地进行。

10. 发明授权

US07877100B2 Position determination system that uses A cellular communication system 有权
标题翻译：使用蜂窝通信系统的位置确定系统
公开(公告)号：US07877100B2
公开(公告)日：2011-01-25
申请号：US12482299
申请日：2009-06-10
申请人： Roland R. Rick , Ivan Fernandez-Corbaton , Jeremy M. Stein , Messay Amerga , Borislav Ristic , Ashok Bhatia
发明人： Roland R. Rick , Ivan Fernandez-Corbaton , Jeremy M. Stein , Messay Amerga , Borislav Ristic , Ashok Bhatia
IPC分类号： H04W24/00
CPC分类号： H04W64/00 , G01S5/0257 , G01S19/48
摘要： A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.
摘要翻译：用于利用蜂窝基站的网络来确定移动站的位置的位置确定系统和装置包括对来自基站的导频信号进行多个统计上独立的数据测量。每个数据测量包括最早的到达时间，为每个导频信号提供多个独立测量。对于每个蜂窝基站，响应于使用AFLT算法和/或结合GPS算法来确定移动站的位置的独立测量来计算代表性测量。在一些实施例中，每个导频信号的数据测量还包括对于每个到达时间的RMSE估计和测量时间以及针对所有可解析路径的能量测量。如果移动站包括蜂窝电话，小区搜索列表和GPS搜索列表可以由小区基站提供。

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