Efficient zadoff-chu sequence generation
    21.
    发明授权
    Efficient zadoff-chu sequence generation 有权
    高效的zadoff-chu序列生成

    公开(公告)号:US08374072B2

    公开(公告)日:2013-02-12

    申请号:US12755998

    申请日:2010-04-07

    IPC分类号: H04J11/00 H04W4/00

    CPC分类号: H04J13/0059 H04J13/14

    摘要: Efficient apparatus and method for Zadoff-Chu (“Chu”) sequence generation avoids additional processing and hardware complexity of conventional quadratic generating formula followed by Discrete Fourier Transform (DFT) with a reference signal generator that produces both a Zadoff-Chu sequence and its DFT. In the wireless communication system (e.g., Long Term Evolution (LTE) system), Chu sequences are extensively used, especially in the uplink (UL). Because of the single carrier operating mode, transmitting a Chu sequence in principle involves a succession of generating that sequence, performing a DFT operation and then an IFFT operation. Assuming that the sequence length is N, the initial sequence generation requires 2N multiplications and the DFT requires more than N log 2(N) multiplications. Given the frequent processing of Chu sequences, this would represent a complexity burden. The invention makes it possible to perform the sequence generation and DFT steps without any multiplication operation, except for possibly calculating certain initial parameters.

    摘要翻译: 用于Zadoff-Chu(Chu)序列生成的高效装置和方法避免了常规二次生成公式的附加处理和硬件复杂性,随后是具有产生Zadoff-Chu序列及其DFT的参考信号发生器的离散傅里叶变换(DFT)。 在无线通信系统(例如,长期演进(Long Term Evolution,LTE)系统)中,尤其在上行链路(UL)中广泛使用了Chu序列。 由于单载波操作模式,原则上发送Chu序列涉及一系列生成该序列,执行DFT操作,然后进行IFFT操作。 假设序列长度为N,则初始序列生成需要2N次乘法,并且DFT需要多于N个log 2(N)乘法。 鉴于Chu序列的频繁处理,这将代表一个复杂的负担。 除了可能计算某些初始参数之外,本发明使得可以执行没有任何乘法运算的序列生成和DFT步骤。

    Channel estimation
    22.
    发明授权
    Channel estimation 有权
    频道估计

    公开(公告)号:US08094760B2

    公开(公告)日:2012-01-10

    申请号:US12191427

    申请日:2008-08-14

    IPC分类号: H04B1/10

    摘要: Aspects describe channel estimation in an OFDM system. Baseline DFT-based channel estimation can be performed and scaling can be applied to mitigate distortion in the DFT-based estimations. In some aspects, baseline DFT-based channel estimation can be performed and tones for which DFT-based estimate is deemed unreliable can have MMSE based processing applied locally. If orthogonal sequence is deemed excessive, orthogonal sequence cancellation can be applied prior to the MMSE based processing.

    摘要翻译: 方面描述OFDM系统中的信道估计。 可以执行基于基于DFT的信道估计,并且可以应用缩放来减轻基于DFT的估计中的失真。 在一些方面,可以执行基于基于DFT的信道估计,并且基于DFT的估计被认为不可靠的音调可以在本地应用基于MMSE的处理。 如果认为正交序列过大,则可以在基于MMSE的处理之前应用正交序列消除。

    HSDPA SYSTEM WITH REDUCED INTER-USER INTERFERENCE
    23.
    发明申请
    HSDPA SYSTEM WITH REDUCED INTER-USER INTERFERENCE 失效
    HSDPA系统具有减少的用户间干扰

    公开(公告)号:US20100202414A1

    公开(公告)日:2010-08-12

    申请号:US12768492

    申请日:2010-04-27

    IPC分类号: H04W72/04 G06F11/08 H03M13/00

    摘要: In a wireless network (100) with HSDPA-enabled user equipment devices (130), the base transceiver station (120) transmits to each HSDPA-enabled UE information regarding allocation of HSDPA codes and associated modulation techniques for other HSDPA-enabled UEs. Using this additional control information, each UE configures decision feedback filter of its equalizer to reduce inter-user interference. The additional control information may be transmitted in a packet (300) that includes a CRC portion (310) with the packet's CRC masked by a common ID, which is known to the HSDPA-enabled UEs. To reduce the number of bits needed to transmit the additional control information, the HSDPA codes used with a particular modulation technique are allocated consecutively. For each modulation technique, only the beginning code and the total number of codes need be known to the UEs. The number of codes used with each modulation technique may be allowed to change once in several TTIs.

    摘要翻译: 在具有支持HSDPA的用户设备(130)的无线网络(100)中,基站收发器(120)向每个支持HSDPA的UE发送关于其他支持HSDPA的UE的HSDPA代码分配和相关调制技术的信息。 使用该附加控制信息,每个UE配置其均衡器的判决反馈滤波器以减少用户间干扰。 附加控制信息可以在包括CRC部分(310)的分组(300)中发送,其中分组的CRC被公共ID掩蔽,这是启用HSDPA的UE已知的。 为了减少发送附加控制信息所需的位数,连续分配与特定调制技术一起使用的HSDPA码。 对于每个调制技术,只有起始码和代码总数需要为UE所知。 可以允许每个调制技术使用的代码数量在几个TTI中改变一次。

    ORTHOGONAL REFERENCE SIGNAL PERMUTATION
    24.
    发明申请
    ORTHOGONAL REFERENCE SIGNAL PERMUTATION 失效
    正交参考信号传输

    公开(公告)号:US20080240281A1

    公开(公告)日:2008-10-02

    申请号:US12055827

    申请日:2008-03-26

    IPC分类号: H04B7/02

    摘要: A method for a wireless communication system is provided. The method includes analyzing a set of signal sources that are operably associated with a set of time domain windows. Often, the method periodically switches the association between the set of time domain windows and the set of signal sources in order to facilitate a determination of one or more signal paths generated by the signal sources.

    摘要翻译: 提供了一种用于无线通信系统的方法。 该方法包括分析与一组时域窗口可操作地相关联的一组信号源。 通常,该方法周期性地切换该组时间窗口和该组信号源之间的关联,以便于确定由信号源产生的一个或多个信号路径。

    Method and apparatus for facilitating sensing in cognitive radio communications
    27.
    发明授权
    Method and apparatus for facilitating sensing in cognitive radio communications 有权
    在认知无线电通信中促进感测的方法和装置

    公开(公告)号:US08804536B2

    公开(公告)日:2014-08-12

    申请号:US13210327

    申请日:2011-08-15

    IPC分类号: H04W24/00 H04W4/00

    CPC分类号: H04W16/14 H04W72/0426

    摘要: Techniques are provided for the suppression of reference signal transmissions to enable sensing in cognitive radio communications. In one example, there is provided a method, operable by a network entity (e.g., evolved Node B), that may involve communicating with another network entity to determine parameters of a quiet period, the parameters comprising at least one of when the quiet period occurs and duration of the quiet period. The method may involve transmitting a reference signal in a first channel exclusively during a first plurality of subframes of a first frame period, wherein the first frame period further includes a quiet period during which no signals are transmitted, and performing during the quiet period a sensing operation with respect to the first channel.

    摘要翻译: 提供技术用于抑制参考信号传输以使得能够在认知无线电通信中进行感测。 在一个示例中,提供了一种由网络实体(例如,演进节点B)操作的方法,其可以涉及与另一网络实体通信以确定安静时段的参数,所述参数包括以下中的至少一个:静默时段 发生和安静期的持续时间。 该方法可以包括在第一帧周期的第一多个子帧期间专门在第一信道中发送参考信号,其中第一帧周期还包括在其期间不发送信号的静默时段,以及在安静周期期间执行感测 相对于第一通道的操作。

    METHOD AND APPARATUS FOR SUPPORTING OPERATION ON DEPENDENT CARRIERS
    28.
    发明申请
    METHOD AND APPARATUS FOR SUPPORTING OPERATION ON DEPENDENT CARRIERS 审中-公开
    支持依托运营商运营的方法和装置

    公开(公告)号:US20130039296A1

    公开(公告)日:2013-02-14

    申请号:US13569083

    申请日:2012-08-07

    IPC分类号: H04W72/04

    摘要: Techniques for supporting communication on multiple carriers are disclosed. In one design, a user equipment (UE) is configured with a base carrier and a dependent carrier linked to the base carrier. Data transmission on the dependent carrier is scheduled via a scheduling carrier, which is different from the dependent carrier. The UE receives a scheduling grant on the scheduling carrier and determines whether the scheduling grant is for the base carrier and/or the dependent carrier. The UE communicates (e.g., sends or receives data) on the base carrier and/or the dependent carrier based on the scheduling grant. The scheduling grant may be (i) a separate grant carrying scheduling information for only one carrier, (ii) a common grant carrying scheduling information for both carriers, (iii) a joint grant carrying separate scheduling information for each carrier, or (iv) a composite grant that may be a separate grant, a common grant, or a joint grant.

    摘要翻译: 公开了用于支持多个载波上的通信的技术。 在一种设计中,用户设备(UE)被配置有与基站运营商链接的基站载波和从属载波。 通过与从属载波不同的调度载波来调度依赖载波上的数据传输。 UE在调度载波上接收调度许可,并确定调度授权是否用于基本载波和/或从属载波。 UE基于调度授权在基站和/或从属载波上进行通信(例如,发送或接收数据)。 调度授权可以是(i)承载仅一个载波的调度信息的单独授权,(ii)承载两个载波的调度信息的公共授权,(iii)携带每个载波的分散调度信息的联合授权,或者(iv) 复合补助金可以是单独的补助金,共同补助金或联合补助金。

    METHOD AND APPARATUS FOR USE OF LICENSED SPECTRUM FOR CONTROL CHANNELS IN COGNITIVE RADIO COMMUNICATIONS
    29.
    发明申请
    METHOD AND APPARATUS FOR USE OF LICENSED SPECTRUM FOR CONTROL CHANNELS IN COGNITIVE RADIO COMMUNICATIONS 有权
    在认证无线电通信中使用许可光谱控制信道的方法和装置

    公开(公告)号:US20120039284A1

    公开(公告)日:2012-02-16

    申请号:US13210341

    申请日:2011-08-15

    IPC分类号: H04W72/04

    摘要: Techniques are provided for control signaling and channel selection in cognitive Long Term Evolution (LTE). In one example, there is provided a method, operable by a mobile entity, that involves receiving, on a licensed channel, broadcasted channel usage information regarding at least one unlicensed channel used by one or more network nodes. The method further involves: performing a cell search procedure based at least in part on the channel usage information to select a given network node among the one or more network nodes; determining at least one random access parameter to be used in establishing wireless communication with the given network node, the at least one random access parameter being associated with a characteristic of the user device and determining a preferred downlink channel.

    摘要翻译: 提供技术用于认知长期演进(LTE)中的控制信令和信道选择。 在一个示例中,提供了一种由移动实体操作的方法,其涉及在许可频道上接收关于由一个或多个网络节点使用的至少一个非许可信道的广播信道使用信息。 所述方法还包括:至少部分地基于所述信道使用信息来执行小区搜索过程,以选择所述一个或多个网络节点中的给定网络节点; 确定要用于建立与所述给定网络节点的无线通信中的至少一个随机接入参数,所述至少一个随机接入参数与所述用户设备的特性相关联并且确定优选下行链路信道。

    EFFICIENT ZADOFF-CHU SEQUENCE GENERATION
    30.
    发明申请
    EFFICIENT ZADOFF-CHU SEQUENCE GENERATION 有权
    有效的ZADOFF-CHU序列生成

    公开(公告)号:US20110249548A1

    公开(公告)日:2011-10-13

    申请号:US12755998

    申请日:2010-04-07

    IPC分类号: H04J11/00 H04L27/28

    CPC分类号: H04J13/0059 H04J13/14

    摘要: Efficient apparatus and method for Zadoff-Chu (“Chu”) sequence generation avoids additional processing and hardware complexity of conventional quadratic generating formula followed by Discrete Fourier Transform (DFT) with a reference signal generator that produces both a Zadoff-Chu sequence and its DFT. In the wireless communication system (e.g., Long Term Evolution (LTE) system), Chu sequences are extensively used, especially in the uplink (UL). Because of the single carrier operating mode, transmitting a Chu sequence in principle involves a succession of generating that sequence, performing a DFT operation and then an IFFT operation. Assuming that the sequence length is N, the initial sequence generation requires 2N multiplications and the DFT requires more than N log 2(N) multiplications. Given the frequent processing of Chu sequences, this would represent a complexity burden. The invention makes it possible to perform the sequence generation and DFT steps without any multiplication operation, except for possibly calculating certain initial parameters.

    摘要翻译: 用于Zadoff-Chu(“Chu”)序列生成的高效装置和方法避免了传统二次生成公式的附加处理和硬件复杂性,随后是具有产生Zadoff-Chu序列及其DFT的参考信号发生器的离散傅里叶变换(DFT) 。 在无线通信系统(例如,长期演进(Long Term Evolution,LTE)系统)中,尤其在上行链路(UL)中广泛使用了Chu序列。 由于单载波操作模式,原则上发送Chu序列涉及一系列生成该序列,执行DFT操作,然后进行IFFT操作。 假设序列长度为N,则初始序列生成需要2N次乘法,并且DFT需要多于N个log 2(N)乘法。 鉴于Chu序列的频繁处理,这将代表一个复杂的负担。 除了可能计算某些初始参数之外,本发明使得可以执行没有任何乘法运算的序列生成和DFT步骤。