公开(公告)号：US07706830B2

公开(公告)日：2010-04-27

申请号：US12116263

申请日：2008-05-07

Applicant: Fatih M. Ozluturk ,  Gary R. Lomp

Inventor： Fatih M. Ozluturk ,  Gary R. Lomp

IPC: H04B7/216 ,  H04B7/00 ,  H04B1/00

CPC classification number: H04W52/36 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B7/2628 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/7071 ,  H04W52/367 ,  H04W52/50 ,  H04W52/60

Abstract: A base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.

Abstract translation: 在建立通信信道期间用于控制发送功率的基站在初始功率提升期间利用短码的接收。 短代码是用于基站检测的序列，其具有比常规访问码短得多的周期。 斜坡上升从低于基站检测所需功率电平的功率电平开始。 短码的功率快速增加，直到基站检测到信号。 一旦基站检测到短码，它就会发送一个指示已经检测到短码。

公开(公告)号：US20090268644A1

公开(公告)日：2009-10-29

申请号：US12499918

申请日：2009-07-09

Applicant: Nadir Sezgin ,  Fatih M. Ozluturk

Inventor： Nadir Sezgin ,  Fatih M. Ozluturk

IPC: H04B1/44

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70752 ,  H04B1/7093 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04L27/2053 ,  H04W56/00 ,  H04W74/04 ,  H04W88/08

Abstract: A time division duplex (TDD) user equipment (UE) is configured to synchronize to a TDD base station. The UE includes an antenna, a primary synchronization code matched filter, a first plurality of secondary synchronization code matched filters, a second plurality of secondary synchronization code matched filters, and a processor in communication with the first and second plurality of secondary synchronization code matched filters. The first plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a first carrier and the second plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a second carrier. The processor is configured to determine a code group assignment and selected timeslot based upon an analysis of the secondary synchronization codes sent on the first and second carriers.

Abstract translation: 时分双工（TDD）用户设备（UE）被配置为与TDD基站同步。 UE包括天线，主同步码匹配滤波器，第一多个次同步码匹配滤波器，第二多个次同步码匹配滤波器，以及与第一和第二多个次同步码匹配滤波器通信的处理器 。 第一多个次同步码匹配滤波器确定在第一载波上发送的次同步码，并且第二多个次同步码匹配滤波器确定在第二载波上发送的辅同步码。 处理器被配置为基于在第一和第二载波上发送的辅助同步码的分析来确定码组分配和选择的时隙。

公开(公告)号：US07603123B2

公开(公告)日：2009-10-13

申请号：US11749068

申请日：2007-05-15

Applicant: Joseph P. Odenwalder

Inventor： Joseph P. Odenwalder

IPC: H04W36/00 ,  H04B7/00

CPC classification number: H04W36/0072 ,  H04B2201/70702 ,  H04W36/0088 ,  H04W36/06 ,  H04W52/12

Abstract: A method for minimizing search time and disruption of current service on an originating frequency during a frequency search excursion to a target frequency as part of an inter-frequency hard handoff between cells on different RF CDMA channels. Disruption of service on the current frequency during the frequency search excursion to the target frequency is minimized by increasing the amount of power allocated to other symbols of two consecutive frames impacted by the search excursion as a function of the search excursion time. The mobile station tunes to a target frequency and collects chip samples, which are stored in a memory buffer. The mobile station returns to the originating frequency to process the collected samples.

Abstract translation: 一种用于在频率搜索偏移到目标频率的过程中将搜索时间最小化的当前服务的最小化和当前服务中断的方法，作为不同RF CDMA信道上的小区之间的频间硬切换的一部分。 作为搜索偏移时间的函数，通过增加分配给由搜索偏移影响的两个连续帧的其他符号的功率的量来最小化在频率搜索偏移到目标频率期间对当前频率上的当前频率的服务中断。 移动台调谐到目标频率并收集存储在存储器缓冲器中的芯片样本。 移动台返回始发频率以处理收集的样本。

公开(公告)号：US07602840B2

公开(公告)日：2009-10-13

申请号：US10873431

申请日：2004-06-21

Applicant: Abhay A. Joshi ,  Arthur James Neufeld

Inventor： Abhay A. Joshi ,  Arthur James Neufeld

IPC: H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC classification number: H04B1/70751 ,  H04B1/70735 ,  H04B1/7077 ,  H04B1/709 ,  H04B2201/70701 ,  H04B2201/70702

Abstract: Systems and techniques to acquire a gated pilot signal by searching for a first gated pilot signal, deriving timing information from the search for the first gated pilot signal, and searching for a second gated pilot signal using the timing information. This can be implemented in a variety of fashions including a receiver with a searcher configured to generate a bit sequence, a correlator configured to correlate a received signal with the bit sequence, and a processor configured to detect a first gated pilot signal as a function of the correlation, derive timing information from the first gated pilot signal, and detect a second gated pilot signal by using the timing information to control the bit sequence generated by the searcher.

Abstract translation: 通过搜索第一门控导频信号来获取门控导频信号的系统和技术，从搜索第一门控导频信号导出定时信息，以及使用定时信息搜索第二门控导频信号。 这可以以各种方式实现，包括具有被配置为生成比特序列的搜索器的接收机，被配置为将接收到的信号与比特序列相关联的相关器，以及被配置为检测第一门控导频信号作为 相关性，从第一门控导频信号导出定时信息，并通过使用定时信息来检测第二门控导频信号，以控制由搜索者产生的比特序列。

公开(公告)号：US07564891B2

公开(公告)日：2009-07-21

申请号：US11124601

申请日：2005-05-05

Applicant: Feng Li

Inventor： Feng Li

IPC: H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC classification number: H04B1/7105 ,  H04B2201/70702 ,  H04B2201/70706 ,  H04B2201/70707 ,  H04J13/004 ,  H04J13/18

Abstract: The invention discloses a method of applying a long cell-code in a joint detection system. At transmitters, multiples of the spreading code (spreading factor) is taken as the length of the long cell-code to scramble the signal, and at receivers, the method still takes the multiuser detection to process the received signal. The method includes that: for every antenna unit, making channel estimation to obtain a channel estimation result of each antenna unit; generating a first mid-matrix of the received data of each antenna unit that relates to selected length of said long cell-code and the channel estimation result; based on the first mid-matrix, generating a second mid-matrix and its associate matrix, and then based on said generated second mid-matrix and its associate matrix, generating a third mid-matrix; making Cholesky decomposition of said third mid-matrix, wherein the number of decomposition order relates to the length of said long cell-code; making demodulation processing based on said Cholesky decomposition result and said received signals of all antenna units having been matching filtered. The whole computation loads of the method are acceptable.

Abstract translation: 本发明公开了一种在联合检测系统中应用长细胞码的方法。 在发射机处，将扩展码的倍数（扩频因子）作为长小区码的长度来加扰信号，在接收机处，该方法仍然采用多用户检测处理接收到的信号。 该方法包括：对于每个天线单元，进行信道估计以获得每个天线单元的信道估计结果; 产生与所述长小区码的选定长度和信道估计结果相关的每个天线单元的接收数据的第一中矩阵; 基于所述第一中矩阵，生成第二中矩阵及其相关矩阵，然后基于所述生成的第二中矩阵及其相关矩阵，生成第三中矩阵; 对所述第三中矩阵进行Cholesky分解，其中分解次数与所述长小区码的长度有关; 基于所述Cholesky分解结果和已经匹配滤波的所有天线单元的所述接收信号进行解调处理。 该方法的整个计算负荷是可以接受的。

公开(公告)号：US20090129488A1

公开(公告)日：2009-05-21

申请号：US11944197

申请日：2007-11-21

Applicant: Rajiv Laroia ,  Sundeep Rangan ,  Junyi Li ,  Thomas Richardson ,  Saurabh Tavildar

Inventor： Rajiv Laroia ,  Sundeep Rangan ,  Junyi Li ,  Thomas Richardson ,  Saurabh Tavildar

IPC: H04B1/10 ,  H04L27/28

CPC classification number: H04L27/2647 ,  H04B1/7103 ,  H04B7/0854 ,  H04B7/0857 ,  H04B2201/70702

Abstract: Various schemes for reducing effects of interference within communication systems are disclosed. A transmitter transmits a signal in a first time interval and a scrambled version of the signal in a second time interval, which does not overlap with the first time interval. A receiver receives a composite signal including a signal transmitted from the desired transmitter as well as signals from interferers in the first or the second time interval. The receiver determines a dominant interferer and obtains knowledge of signal scrambling done by the interferer as well as the desired transmitter by sensing an identification associated with the interferer or the desired transmitter. This knowledge is employed to determine coefficients for combining the received composite signals received in the first and the second time interval in order to recover the desired signal in a manner that maximizes the SNR associated with the desired signal or completely cancels the dominant interference.

Abstract translation: 公开了用于减少通信系统内的干扰影响的各种方案。 发射机以与第一时间间隔不重叠的第二时间间隔发送第一时间间隔中的信号和信号的加扰版本。 接收机在第一或第二时间间隔中接收包括从所需发射机发送的信号以及来自干扰源的信号的复合信号。 接收机确定主要干扰源，并且通过感测与干扰源或期望发射机相关联的标识来获得由干扰源以及所需发射机完成的信号加扰的知识。 该知识用于确定用于组合在第一和第二时间间隔中接收的接收的复合信号的系数，以便以最大化与期望信号相关联的SNR或完全抵消显性干扰的方式恢复期望信号。

公开(公告)号：US20090067477A1

公开(公告)日：2009-03-12

申请号：US12269011

申请日：2008-11-11

Applicant: Francesco Grilli ,  Serge Willenegger

Inventor： Francesco Grilli ,  Serge Willenegger

IPC: H04B1/00

CPC classification number: H04W64/00 ,  G01S5/10 ,  H04B1/7117 ,  H04B2201/70701 ,  H04B2201/70702

Abstract: Unassigned finger processors are used to process and measure the arrival times of transmissions from base stations not in the active set. A first set of one or more base stations in active communication with the remote terminal is identified and each base station in the first set is assigned at least one finger processor. A second set of one or more base stations not in active communication with the remote terminal is also identified and an available finger processor is assigned to each of at least one base station in the second set. A (signal arrival) time measurement is then performed for each base station, and outputs indicative of the measurements are provided for further processing.

Abstract translation: 未分配的手指处理器用于处理和测量来自不在主动集合中的基站的传输的到达时间。 识别与远程终端主动通信的第一组一个或多个基站，并且向第一组中的每个基站分配至少一个手指处理器。 还识别出与远程终端未主动通信的第二组一个或多个基站，并且将可用的手指处理器分配给第二组中的至少一个基站中的每一个。 然后对每个基站执行A（信号到达）时间测量，并且提供指示测量的输出用于进一步处理。

公开(公告)号：US20090054060A1

公开(公告)日：2009-02-26

申请号：US11596795

申请日：2005-05-10

Applicant: Alan Edward Jones

Inventor： Alan Edward Jones

IPC: H04W64/00

CPC classification number: H04B1/7107 ,  H04B1/7105 ,  H04B2201/70702

Abstract: A multi-user detector (200) and method (300) for use in a cellular CDMA system (100) based on: estimating (210) spare code resource available in a first cell of the system; selecting (220) at least a second cell neighbouring the first cell; selecting (230) from codes associated with the second cell at least one additional code; and performing (240) multi-user detection processing in the first cell with the at least one additional code. On the downlink, codes from other users in the same cell may be treated with the same level of priority as those of users from neighbour cells, codes allocated to the UE having the highest priority; on the uplink, codes of all users in the same cell may have the same priority which is higher than that of neighbour cell users. This provides the advantage(s) that multi-user detector capacity arising from operating under high interference conditions is employed to accommodate users from neighbour cells, with the result that both intracell and intercell interference may be mitigated.

Abstract translation: 一种用于在蜂窝CDMA系统（100）中使用的多用户检测器（200）和方法（300），其基于：估计（210）所述系统的第一小区中可用的备用码资源; 选择（220）与所述第一小区相邻的至少第二小区; 从与所述第二小区相关联的代码中选择（230）至少一个附加代码; 以及利用所述至少一个附加代码在所述第一小区中执行（240）多用户检测处理。 在下行链路中，来自相同小区中的来自其他用户的代码可以以与来自相邻小区的用户相同的优先级来处理，分配给具有最高优先级的UE的代码; 在上行链路上，相同小区中的所有用户的代码可能具有比邻居小区用户高的优先级。 这提供了用于在高干扰条件下操作产生的多用户检测器容量以适应来自相邻小区的用户的优点，从而可以减轻小区和小区间干扰。

公开(公告)号：US07496064B2

公开(公告)日：2009-02-24

申请号：US11043253

申请日：2005-01-25

Applicant: Yefim Kupershmidt

Inventor： Yefim Kupershmidt

IPC: H04B7/212

CPC classification number: H04W88/04 ,  H04B1/7163 ,  H04B7/2628 ,  H04B2201/70702 ,  H04L1/0041 ,  H04L1/1607 ,  H04L45/00 ,  H04L45/16 ,  H04L47/14 ,  H04W28/065 ,  H04W28/14 ,  H04W72/0446 ,  H04W72/1242 ,  H04W72/1263 ,  H04W74/08

Abstract: A method and device for ultra wide band wireless medium access control, the method includes: assigning a plurality of information frames to at least one DRP queue and to at least one PCA queues; determining whether to re-assign at least one information frame previously assigned to at least one DRP queue to a PCA queue; and re-assigning at least one information frame in response to the determination. A device and method for ultra wide band wireless medium access control, the method includes: assigning a plurality of information frames to at least one DRP queue and to at least one PCA queues; and scheduling a transmission of at least one information frame assigned to at least one DRP queue during at least one PCA transmission period.

Abstract translation: 一种用于超宽带无线介质访问控制的方法和装置，所述方法包括：将多个信息帧分配给至少一个DRP队列和至少一个PCA队列; 确定是否将先前分配给至少一个DRP队列的至少一个信息帧重新分配给PCA队列; 以及响应于所述确定重新分配至少一个信息帧。 一种用于超宽带无线介质访问控制的装置和方法，所述方法包括：将多个信息帧分配给至少一个DRP队列和至少一个PCA队列; 以及在至少一个PCA发送周期期间调度分配给至少一个DRP队列的至少一个信息帧的传输。

公开(公告)号：US20080310321A1

公开(公告)日：2008-12-18

申请号：US12196489

申请日：2008-08-22

Applicant: Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

Inventor： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

IPC: H04B7/26 ,  H04B7/216 ,  G08C15/00

CPC classification number: H04W56/002 ,  H04B7/2668 ,  H04B2201/70702 ,  H04W56/001 ,  H04W56/0015 ,  H04W56/0045 ,  H04W92/20

Abstract: Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).

Abstract translation: 将来自多个基站的传输时间对齐到终端的方案。 为了实现时间对准，确定在终端观察到的来自基站的传输的到达时间之间的差异，并将其提供给系统，并用于调整基站处的定时，使得终端专用无线帧到达 终端在特定的时间窗口内。 在一个方案中，两个基站之间的时差被划分为帧级时间差和码片级时间差。 无论何时请求执行和报告时差测量，终端测量每个候选基站相对于参考基站的芯片级定时。 此外，终端还测量帧级定时，并且仅在需要时在时差测量中包括该信息。 否则，终端将帧级部分设置为预定值（例如，零）。