Channel estimation with effective co-channel interference suppression
    1.
    发明授权
    Channel estimation with effective co-channel interference suppression 失效
    信道估计与有效的同信道干扰抑制

    公开(公告)号:US08787499B2

    公开(公告)日:2014-07-22

    申请号:US12055745

    申请日:2008-03-26

    摘要: A method for a wireless communication system is provided. The method includes isolating a set of pilot signals, where the pilot signals are associated with multiple base stations or multiple sectors of a single base station. This includes nulling a subset of the pilot signals to mitigate co-channel interference and to perform channel estimation in accordance with at least one of the pilot signals.

    摘要翻译: 提供了一种用于无线通信系统的方法。 该方法包括隔离一组导频信号,其中导频信号与单个基站的多个基站或多个扇区相关联。 这包括使导频信号的子集归零以减轻同信道干扰并根据导频信号中的至少一个执行信道估计。

    CHANNEL ESTIMATION WITH EFFECTIVE CO-CHANNEL INTERFERENCE SUPPRESSION
    2.
    发明申请
    CHANNEL ESTIMATION WITH EFFECTIVE CO-CHANNEL INTERFERENCE SUPPRESSION 失效
    具有有效的共通道干扰抑制的信道估计

    公开(公告)号:US20080240314A1

    公开(公告)日:2008-10-02

    申请号:US12055745

    申请日:2008-03-26

    IPC分类号: H04B1/10

    摘要: A method for a wireless communication system is provided. The method includes isolating a set of pilot signals, where the pilot signals are associated with multiple base stations or multiple sectors of a single base station. This includes nulling a subset of the pilot signals to mitigate co-channel interference and to perform channel estimation in accordance with at least one of the pilot signals.

    摘要翻译: 提供了一种用于无线通信系统的方法。 该方法包括隔离一组导频信号,其中导频信号与单个基站的多个基站或多个扇区相关联。 这包括使导频信号的子集归零以减轻同信道干扰并根据导频信号中的至少一个执行信道估计。

    Method and apparatus for computing and reporting channel quality indication (CQI)
    4.
    发明授权
    Method and apparatus for computing and reporting channel quality indication (CQI) 有权
    用于计算和报告信道质量指示(CQI)的方法和装置

    公开(公告)号:US08432873B2

    公开(公告)日:2013-04-30

    申请号:US12652605

    申请日:2010-01-05

    IPC分类号: H04B7/216

    摘要: Techniques for computing and reporting channel quality indication (CQI) are described. In an aspect, a plurality of CQI computation methods may be supported, and each CQI computation method may indicate how CQI should be computed. One CQI computation method may be selected for use. CQI may then be computed and reported in accordance with the selected CQI computation method. In an exemplary design, a user equipment (UE) may obtain a selected method for computing CQI, which may be chosen based on the UE capability and/or other factors. The selected method may specify (i) CQI computation for a specific codeword among a plurality of codewords or (ii) CQI computation by averaging signal quality across a plurality of layers used for transmission. The UE may compute CQI in accordance with the selected method, send the CQI to a base station, and receive data sent by the base station based on the CQI.

    摘要翻译: 描述了用于计算和报告信道质量指示(CQI)的技术。 在一个方面,可以支持多个CQI计算方法,并且每个CQI计算方法可以指示如何计算CQI。 可以选择一种CQI计算方法来使用。 然后可以根据所选择的CQI计算方法来计算和报告CQI。 在示例性设计中,用户设备(UE)可以获得用于计算CQI的所选择的方法,其可以基于UE能力和/或其他因素来选择。 所选择的方法可以指定(i)针对多个码字中的特定码字的CQI计算,或者(ii)通过用于传输的多个层平均信号质量的CQI计算。 UE可以根据所选择的方法计算CQI,向基站发送CQI,并且基于CQI接收由基站发送的数据。

    METHOD AND APPARATUS FOR COMPUTING AND REPORTING CHANNEL QUALITY INDICATION (CQI)
    6.
    发明申请
    METHOD AND APPARATUS FOR COMPUTING AND REPORTING CHANNEL QUALITY INDICATION (CQI) 有权
    计算和报告信道质量指示(CQI)的方法和装置

    公开(公告)号:US20100177653A1

    公开(公告)日:2010-07-15

    申请号:US12652605

    申请日:2010-01-05

    IPC分类号: H04L12/26

    摘要: Techniques for computing and reporting channel quality indication (CQI) are described. In an aspect, a plurality of CQI computation methods may be supported, and each CQI computation method may indicate how CQI should be computed. One CQI computation method may be selected for use. CQI may then be computed and reported in accordance with the selected CQI computation method. In an exemplary design, a user equipment (UE) may obtain a selected method for computing CQI, which may be chosen based on the UE capability and/or other factors. The selected method may specify (i) CQI computation for a specific codeword among a plurality of codewords or (ii) CQI computation by averaging signal quality across a plurality of layers used for transmission. The UE may compute CQI in accordance with the selected method, send the CQI to a base station, and receive data sent by the base station based on the CQI.

    摘要翻译: 描述了用于计算和报告信道质量指示(CQI)的技术。 在一个方面,可以支持多个CQI计算方法,并且每个CQI计算方法可以指示如何计算CQI。 可以选择一种CQI计算方法来使用。 然后可以根据所选择的CQI计算方法来计算和报告CQI。 在示例性设计中,用户设备(UE)可以获得用于计算CQI的所选择的方法,其可以基于UE能力和/或其他因素来选择。 所选择的方法可以指定(i)针对多个码字中的特定码字的CQI计算,或者(ii)通过用于传输的多个层平均信号质量的CQI计算。 UE可以根据所选择的方法计算CQI,向基站发送CQI,并且基于CQI接收由基站发送的数据。

    Efficient zadoff-chu sequence generation
    7.
    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
    8.
    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
    9.
    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
    10.
    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。