ADAPTIVE TWO-DIMENSIONAL CHANNEL INTERPOLATION
    71.
    发明申请
    ADAPTIVE TWO-DIMENSIONAL CHANNEL INTERPOLATION 有权
    自适应二维通道插值

    公开(公告)号:US20090213948A1

    公开(公告)日:2009-08-27

    申请号:US12064566

    申请日:2006-08-22

    IPC分类号: H04J11/00 H04L27/00 H04L27/28

    摘要: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).

    摘要翻译: 一种用于改善OFDM通信系统内的信道估计的方法和装置。 OFDM中的信道估计通常借助于导频符号来执行。 导频符号通常在时间和频率上间隔开。 将导频符号插入的频率和时间的集合称为导频模式。 在一些情况下,导频图案是对角线形格子,规则的或不规则的。 该方法首先在较大相干性(时间或频率)的方向内插。 使用这些测量,导频符号在更快变化方向上的密度将增加,从而改善信道估计而不增加开销。 因此,第一内插步骤的结果然后可以用于辅助尺寸较小的相干性(时间或频率)的内插。

    Method and system for combining OFDM and transformed OFDM
    73.
    发明授权
    Method and system for combining OFDM and transformed OFDM 有权
    用于组合OFDM和变换OFDM的方法和系统

    公开(公告)号:US08724445B2

    公开(公告)日:2014-05-13

    申请号:US13047291

    申请日:2011-03-14

    IPC分类号: H04J9/00

    摘要: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.

    摘要翻译: 提供了使OFDM发射机能够用于传输常规OFDM或变换OFDM形式的方法和系统。 提供了一种用于在IFFT之前变换样本的编码和调制序列的技术,其使得能够使用常规OFDM或变换OFDM来发送变换的样本序列。 用于变换样本的编码和调制序列的变换函数的选择可以基于优化发射机和接收机之间的特定操作条件的变换函数。 在本发明的一些实施例中,OFDM和时变OFDM在传输帧中以时间和/或频率被复用。 在本发明的一些实施例中,提供了导频模式,其中使用OFDM发送导频,并且使用OFDM和/或经变换的OFDM发送数据。

    METHOD AND SYSTEM USING RELAYS WITH AGGREGATED SPECTRUM
    74.
    发明申请
    METHOD AND SYSTEM USING RELAYS WITH AGGREGATED SPECTRUM 有权
    使用集成光谱的继电器的方法和系统

    公开(公告)号:US20110158156A1

    公开(公告)日:2011-06-30

    申请号:US12996189

    申请日:2009-06-12

    IPC分类号: H04W72/04 H04W88/04

    摘要: International Mobile Telecommunications (IMT) Advanced technology, also known as 4th Generation (4G) targets to support up to 100 MHz BW. LTE currently supports single carrier bandwidths of up to 20 MHz. The present application describes a multi-carrier approach in which some embodiments of the invention provide a simple solution of aggregating multiple single carrier bandwidths to obtain a wider bandwidth (>20 MHz). Such an approach may extend Long Term Evolution (LTE) bandwidth to greater than that provided by a single carrier, yet maintain full backward compatibility with technologies that predate 4G technology and utilize smaller, single carrier bandwidths. More generally, embodiments of the invention can apply to other communication standards than only LTE.

    摘要翻译: 国际移动电信(IMT)先进技术,也被称为第四代(4G)目标,以支持高达100 MHz的BW。 LTE目前支持高达20 MHz的单载波带宽。 本申请描述了多载波方法,其中本发明的一些实施例提供聚合多个单载波带宽以获得更宽带宽(> 20MHz)的简单解决方案。 这种方法可以将长期演进(LTE)带宽扩展到大于由单个载波提供的带宽,但仍然保持与早于4G技术并利用更小的单载波带宽的技术的完全向后兼容性。 更一般地,本发明的实施例可以应用于仅比LTE的其他通信标准。

    Methods of radio communication involving multiple radio channels, and radio signal repeater and mobile station apparatuses implementing same
    75.
    发明申请
    Methods of radio communication involving multiple radio channels, and radio signal repeater and mobile station apparatuses implementing same 审中-公开
    涉及多个无线信道的无线通信方法,实现无线信道的无线信号中继器和移动台装置

    公开(公告)号:US20110134772A1

    公开(公告)日:2011-06-09

    申请号:US12923519

    申请日:2010-09-24

    IPC分类号: H04W40/00 H04J4/00 H04W24/00

    摘要: A method of facilitating radio communications involves receiving a first message from a first remote radio station on a first radio channel, transmitting the first message to a second remote radio station on a second radio channel, receiving a second message from the second remote radio station on a third radio channel, and transmitting the second message to the first remote radio station on a fourth radio channel. A method of radio communication involves receiving a first radio signal from a first remote radio station on a first radio channel, transmitting a second radio signal to the first remote radio station on a second radio channel, receiving a third radio signal from a second remote radio station on a third radio channel, and transmitting a fourth radio signal to the second remote radio station on a fourth radio channel. Radio signal repeater and mobile station apparatuses are also disclosed.

    摘要翻译: 一种促进无线电通信的方法涉及在第一无线电信道上从第一远程无线电站接收第一消息,在第二无线电信道上将第一消息发送到第二远程无线电台,从第二远程无线电台接收第二消息, 第三无线电信道,并且在第四无线电信道上将所述第二消息发送到所述第一远程无线电台。 无线电通信的方法涉及在第一无线电信道上从第一远程无线电站接收第一无线电信号,在第二无线电信道上向第一远程无线电台发送第二无线电信号,从第二无线电信道接收第三无线电信号 并且在第四无线电信道上向第二远程无线电台发送第四无线电信号。 还公开了无线电信号中继器和移动站装置。

    MULTIMEDIA BROADCAST MULTICAST SERVICE (MBMS) UTILIZING SPATIAL MULTIPLEXING
    76.
    发明申请
    MULTIMEDIA BROADCAST MULTICAST SERVICE (MBMS) UTILIZING SPATIAL MULTIPLEXING 有权
    多媒体广播多媒体服务(MBMS)利用空间多路复用

    公开(公告)号:US20110019605A1

    公开(公告)日:2011-01-27

    申请号:US12933740

    申请日:2009-03-20

    IPC分类号: H04H20/71 H04W72/04 H04B7/14

    摘要: Systems and methods are disclosed herein for an enhanced Multimedia Broadcast Multicast Service (MBMS) in a wireless communications network. In one embodiment, a number of base stations in a MBMS zone, or broadcast region, accommodate both Spatial Multiplexing (SM) enabled user elements and non-SM enabled user elements. In another embodiment, a number of base stations form a MBMS zone, or broadcast region, where the MBMS zone is sub-divided into an SM zone and a non-SM zone. In another embodiment, the wireless communications network includes multiple MBMS zones. For each MBMS zone, base stations serving the MBMS zone transmit an MBMS zone identifier (ID) for the MBMS zone. The MBMS zone ID may be used by a user element for decoding and/or to determine when to perform a handoff from one MBMS zone to another.

    摘要翻译: 这里公开了用于无线通信网络中的增强型多媒体广播多播服务(MBMS)的系统和方法。 在一个实施例中,MBMS区域或广播区域中的多个基站适应启用的空间复用(SM)用户元件和不启用SM的用户元件。 在另一个实施例中,多个基站形成MB​​MS区域或广播区域,其中MBMS区域被划分为SM区域和非SM区域。 在另一个实施例中,无线通信网络包括多个MBMS区域。 对于每个MBMS区域,服务于MBMS区域的基站发送MBMS区域的MBMS区域标识符(ID)。 MBMS区域ID可以由用户单元用于解码和/或确定何时执行从一个MBMS区域到另一个MBMS区域的切换。

    Adaptive two-dimensional channel interpolation
    78.
    发明授权
    Adaptive two-dimensional channel interpolation 有权
    自适应二维信道插值

    公开(公告)号:US08331465B2

    公开(公告)日:2012-12-11

    申请号:US12064566

    申请日:2006-08-22

    IPC分类号: H04K1/10

    摘要: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).

    摘要翻译: 一种用于改善OFDM通信系统内的信道估计的方法和装置。 OFDM中的信道估计通常借助于导频符号来执行。 导频符号通常在时间和频率上间隔开。 将导频符号插入的频率和时间的集合称为导频模式。 在一些情况下,导频图案是对角线形格子,规则的或不规则的。 该方法首先在较大相干性(时间或频率)的方向内插。 使用这些测量,导频符号在更快变化方向上的密度将增加,从而改善信道估计而不增加开销。 因此,第一内插步骤的结果然后可以用于辅助尺寸较小的相干性(时间或频率)的内插。

    Methods and systems for transmission of orthogonal frequency division multiplexed symbols
    80.
    发明授权
    Methods and systems for transmission of orthogonal frequency division multiplexed symbols 有权
    用于传输正交频分复用符号的方法和系统

    公开(公告)号:US07813261B2

    公开(公告)日:2010-10-12

    申请号:US11887115

    申请日:2006-03-30

    摘要: In some embodiments of the present invention there is provided a frame structure for transmitting an integer number of OFDM symbols in which some of the OFDM symbols are to be transmitted in a unicast format and some of the OFDM symbols are to be transmitted in a broadcast format. The frame structure includes partitioning of a frame into at least two portions to accommodate both unicast and broadcast modes in the frame. The frame structure is used for transmitting multiple frames in a serial manner from at least one transmitter. The unicast mode supports transmission of OFDM symbols from a single transmitter to a single receiver. The broadcast mode supports transmission of OFDM symbols from multiple transmitters to all receivers within range of the multiple transmitters. The multicast mode supports transmission of OFDM symbols from multiple transmitters to multiple receivers within range of the multiple transmitters.

    摘要翻译: 在本发明的一些实施例中,提供了一种用于发送整数个OFDM符号的帧结构,其中一些OFDM符号将以单播格式发送,并且一些OFDM符号将以广播格式发送 。 帧结构包括将帧划分成至少两个部分以适应帧中的单播和广播模式。 帧结构用于从至少一个发射机以串行方式发送多个帧。 单播模式支持将OFDM符号从单个发射机传输到单个接收机。 广播模式支持从多个发射机向多个发射机的范围内的所有接收机传输OFDM符号。 组播模式支持将多个发射机的OFDM符号从多个发射机的范围内传输到多个接收机。