Method and system for multirate multiuser modulation

    公开(公告)号:US07139237B2

    公开(公告)日:2006-11-21

    申请号:US09961516

    申请日:2001-09-24

    IPC分类号: H04J13/02

    摘要: A multi-rate interleaved frequency division multiple access (IFDMA) modulation scheme permits users to transmit at different data rates or to vary their data rates while providing frequency diversity and preserving low peak-to-average power ratios and orthogonality between users at different data rates. The modulation scheme allows user-specific data block and repetition sizes, as well as user-specific modulation codes. Code assignment rules are provided for maintaining orthogonality between users having different data rates. Block and phase ramp modulation codes can be used. Asynchronous transmissions by users are supported by ensuring that the length of the cyclic extension is sufficiently long to tolerate worst case relative signal arrival delays between users and the channel pulse response duration over the communication medium. The modulation scheme can be employed in wireless communication systems, such as cellular or paging systems.

    Method and system for multirate multiuser modulation
    2.
    发明授权
    Method and system for multirate multiuser modulation 有权
    多速率多用户调制方法和系统

    公开(公告)号:US07701839B2

    公开(公告)日:2010-04-20

    申请号:US11561481

    申请日:2006-11-20

    摘要: A multi-rate interleaved frequency division multiple access (IFDMA) modulation scheme permits users to transmit at different data rates or to vary their data rates while providing frequency diversity and preserving low peak-to-average power ratios and orthogonality between user data rates. The modulation scheme allows user-specific data block and repetition sizes, as well as user-specific modulation codes. Code assignment rules are provided for maintaining orthogonality between the different user data rates. Block and phase ramp modulation codes can be used. Asynchronous transmissions by users are supported by ensuring that the length of the cyclic extension is sufficiently long to tolerate worst case relative signal arrival delays between users and the channel pulse response duration over the communication medium. The modulation scheme can be employed in wireless communication systems, such as cellular or paging systems.

    摘要翻译: 多速率交织的频分多址(IFDMA)调制方案允许用户以不同的数据速率进行传输或改变其数据速率,同时提供频率分集并保持低的峰值与平均功率比和用户数据速率之间的正交性。 调制方案允许用户特定的数据块和重复大小,以及用户特定的调制码。 提供代码分配规则用于维持不同用户数据速率之间的正交性。 可以使用块和相位斜坡调制码。 通过确保循环扩展的长度足够长以容忍用户之间的最差情况相对信号到达延迟和通信介质上的信道脉冲响应持续时间来支持用户的异步传输。 调制方案可用于诸如蜂窝或寻呼系统的无线通信系统中。

    Method and system for adaptive control of sub-carriers
    3.
    发明授权
    Method and system for adaptive control of sub-carriers 有权
    子载波的自适应控制方法和系统

    公开(公告)号:US07388923B2

    公开(公告)日:2008-06-17

    申请号:US11147092

    申请日:2005-06-07

    IPC分类号: H04K1/10 H04J11/00 H04B7/208

    摘要: A method and system for adaptive control of sub-carriers is useful for increasing frequency diversity gain to improve bit error rate performance in an Interleaved Frequency Division Multiple Access (IFDMA) system. The method includes selecting a combination of a Repetition Factor (RF) and a repetition block size (Q), from possible combinations of a RF and a Q, based on a number of users (Nu) (step 1405). A Spreading Factor (SF), Forward Error Correction (FEC) coding rate (R), or modulation order (M) based on the Nu is then determined (step 1410). Control signals are then provided based on the RF and Q, and based on the SF, R, or M (step 1415).

    摘要翻译: 用于子载波的自适应控制的方法和系统对于增加频率分集增益是有用的,以提高交错频分多址(IFDMA)系统中的误码率性能。 该方法包括从RF和Q的可能组合中,基于用户数量(N N)来选择重复因子(RF)和重复块大小(Q)的组合 步骤1405)。 然后确定基于N N的扩频因子(SF),前向纠错(FEC)编码率(R)或调制阶数(M)(步骤1410)。 然后基于RF和Q,并且基于SF,R或M(步骤1415)提供控制信号。

    Method and system of operation for a variable transmission mode multi-carrier communication system
    4.
    发明授权
    Method and system of operation for a variable transmission mode multi-carrier communication system 有权
    可变传输模式多载波通信系统的方法和操作系统

    公开(公告)号:US06754169B2

    公开(公告)日:2004-06-22

    申请号:US10022295

    申请日:2001-12-13

    IPC分类号: H04L2302

    CPC分类号: H04L27/2608 H04L1/0015

    摘要: The present invention provides a method of operation for a variable transmission mode multi-carrier communication system by receiving a signal, determining a link quality as a function of the received signal, and selecting a compound multi-carrier communication mode as a function of the link quality.

    摘要翻译: 本发明提供了一种通过接收信号,确定作为接收信号的函数的链路质量来确定可变传输模式多载波通信系统的操作方法,并且选择作为链路的函数的复合多载波通信模式 质量。

    Method and System for Multirate Multiuser Modulation
    5.
    发明申请
    Method and System for Multirate Multiuser Modulation 有权
    多速率多用户调制方法与系统

    公开(公告)号:US20070091866A1

    公开(公告)日:2007-04-26

    申请号:US11561481

    申请日:2006-11-20

    IPC分类号: H04J1/00 H04B7/208

    摘要: A multi-rate interleaved frequency division multiple access (IFDMA) modulation scheme permits users to transmit at different data rates or to vary their data rates while providing frequency diversity and preserving low peak-to-average power ratios and orthogonality between user data rates. The modulation scheme allows user-specific data block and repetition sizes, as well as user-specific modulation codes. Code assignment rules are provided for maintaining orthogonality between the different user data rates. Block and phase ramp modulation codes can be used. Asynchronous transmissions by users are supported by ensuring that the length of the cyclic extension is sufficiently long to tolerate worst case relative signal arrival delays between users and the channel pulse response duration over the communication medium. The modulation scheme can be employed in wireless communication systems, such as cellular or paging systems.

    摘要翻译: 多速率交织的频分多址(IFDMA)调制方案允许用户以不同的数据速率进行传输或改变其数据速率,同时提供频率分集并保持低的峰值与平均功率比和用户数据速率之间的正交性。 调制方案允许用户特定的数据块和重复大小,以及用户特定的调制码。 提供代码分配规则用于维持不同用户数据速率之间的正交性。 可以使用块和相位斜坡调制码。 通过确保循环扩展的长度足够长以容忍用户之间的最差情况相对信号到达延迟和通信介质上的信道脉冲响应持续时间来支持用户的异步传输。 调制方案可用于诸如蜂窝或寻呼系统的无线通信系统中。

    Physical layer acknowledgement signaling resource allocation in wireless communication systems
    8.
    发明授权
    Physical layer acknowledgement signaling resource allocation in wireless communication systems 有权
    无线通信系统中的物理层确认信令资源分配

    公开(公告)号:US09450727B2

    公开(公告)日:2016-09-20

    申请号:US12364992

    申请日:2009-02-03

    摘要: A downlink subframe on a single downlink carrier supports physical layer acknowledgment signaling for multiple physical uplink shared channel (PUSCH) transmissions. The physical layer acknowledgement signaling may take the form of physical hybrid ARQ indicator channel (PHICH) signaling. A base unit reserves resource elements groups (REGs) for default PHICH signaling of default PUSCH transmissions. The base unit reserves control channel elements (CCEs) for physical downlink control channel (PDCCH) signaling. A CCE contains multiple interleaved REGs. The base unit takes any unreserved CCEs and maps those CCEs for physical layer acknowledgement signaling of additional PUSCH transmissions.

    摘要翻译: 单个下行链路载波上的下行链路子帧支持用于多个物理上行链路共享信道(PUSCH)传输的物理层确认信令。 物理层确认信令可以采取物理混合ARQ指示符信道(PHICH)信令的形式。 基站单元为缺省PUSCH传输的默认PHICH信令保留资源单元组(REG)。 基站单元保留用于物理下行链路控制信道(PDCCH)信令的控制信道单元(CCE)。 CCE包含多个交错REG。 基站单元接收任何未保留的CCE,并映射这些CCE用于附加PUSCH传输的物理层确认信令。

    Reference signal for a control channel in wireless communication network
    10.
    发明授权
    Reference signal for a control channel in wireless communication network 有权
    无线通信网络中控制信道的参考信号

    公开(公告)号:US08665811B2

    公开(公告)日:2014-03-04

    申请号:US13210317

    申请日:2011-08-15

    IPC分类号: H04W4/00

    CPC分类号: H04L25/0228 H04L5/0048

    摘要: A wireless communication terminal receives a first set of pilot signal resource elements and control information in spatial layers in a first resource block in a subframe and a second set of pilot signal resource elements and data in spatial layers in a second resource block in the subframe, wherein the first and second resource blocks span a set of time symbols in a sub-frame, the first resource blocks span a first set of frequency carriers in the sub-frame, and the second resource blocks span a second set of frequency carriers in the sub-frame. The terminal decodes the spatial layers in which the control information is received using the first set of pilot signal resource elements. The terminal also decodes the spatial layers in which the data are received in the second resource block using the second set of pilot signal resource elements.

    摘要翻译: 无线通信终端在子帧中的第一资源块中的空间层中接收第一组导频信号资源元素和控制信息,并且在子帧中的第二资源块中接收第二组导频信号资源元素和空间层中的数据, 其中所述第一和第二资源块跨越子帧中的一组时间符号,所述第一资源块跨越所述子帧中的第一组频率载波,并且所述第二资源块跨越所述子帧中的第二组频率载波 子框架 终端使用第一组导频信号资源元素解码接收了控制信息的空间层。 终端还使用第二组导频信号资源元素对在第二资源块中接收数据的空间层进行解码。