公开(公告)号：US20070091866A1

公开(公告)日：2007-04-26

申请号：US11561481

申请日：2006-11-20

申请人： Vijay Nangia ,  Kevin Baum ,  Karthik Ramasubramanian

发明人： Vijay Nangia ,  Kevin Baum ,  Karthik Ramasubramanian

IPC分类号： H04J1/00 ,  H04B7/208

CPC分类号： H04J13/004 ,  H04B2201/70703 ,  H04J13/18 ,  H04L5/023

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。

公开(公告)号：US07139237B2

公开(公告)日：2006-11-21

申请号：US09961516

申请日：2001-09-24

申请人： Vijay Nangia ,  Kevin Lynn Baum ,  Karthik Ramasubramanian

发明人： Vijay Nangia ,  Kevin Lynn Baum ,  Karthik Ramasubramanian

IPC分类号： H04J13/02

CPC分类号： H04J13/004 ,  H04B2201/70703 ,  H04J13/18 ,  H04L5/023

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.

公开(公告)号：US07701839B2

公开(公告)日：2010-04-20

申请号：US11561481

申请日：2006-11-20

申请人： Vijay Nangia ,  Kevin Lynn Baum ,  Karthik Ramasubramanian

发明人： Vijay Nangia ,  Kevin Lynn Baum ,  Karthik Ramasubramanian

IPC分类号： H04L5/12 ,  H04J1/00 ,  H04B7/208 ,  H04J1/06

CPC分类号： H04J13/004 ,  H04B2201/70703 ,  H04J13/18 ,  H04L5/023

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。

公开(公告)号：US20070183374A1

公开(公告)日：2007-08-09

申请号：US11348208

申请日：2006-02-06

申请人： Brian Classon ,  Michael Kotzin ,  Ravi Kuchibhotla ,  Kevin Baum ,  Vijay Nangia ,  Philippe Sartori

发明人： Brian Classon ,  Michael Kotzin ,  Ravi Kuchibhotla ,  Kevin Baum ,  Vijay Nangia ,  Philippe Sartori

IPC分类号： H04Q7/24

CPC分类号： H04W36/0083 ,  H04W36/0055 ,  H04W36/36 ,  H04W88/04 ,  H04W88/06

摘要： A method is provided that comprises detecting, by a first user terminal of a wireless system, a second user terminal having wireless system information. The wireless system information has timely wireless system parameters. The timely wireless system parameters are collected from the second user terminal. The first user terminal communicates with a base station based on the wireless system parameters.

摘要翻译： 提供了一种方法，包括由无线系统的第一用户终端检测具有无线系统信息的第二用户终端。 无线系统信息具有及时的无线系统参数。 从第二用户终端收集及时的无线系统参数。 第一用户终端基于无线系统参数与基站进行通信。

公开(公告)号：US20070041311A1

公开(公告)日：2007-02-22

申请号：US11207457

申请日：2005-08-18

申请人： Kevin Baum ,  Brian Classon ,  Vijay Nangia

发明人： Kevin Baum ,  Brian Classon ,  Vijay Nangia

IPC分类号： H04J11/00

CPC分类号： H04L5/0048 ,  H04L5/0023 ,  H04L25/0226

摘要： A method and apparatus for pilot signal transmission is disclosed herein. In particular, a pilot transmission scheme is utilized where pilot sub-carrier bandwidth differs from data sub-carrier bandwidth. Because some user's data sub-carriers will no longer have the user's pilot sub-carriers adjacent to them, the set, or pattern of sub-carriers used by the pilot blocks changes at least once in a burst. Changing the pilot block pattern (the set of occupied pilot block sub-carriers) at least once in the burst serves to increase the frequency proximity of occupied data sub-carriers to occupied pilot sub-carriers in the burst.

摘要翻译： 本文公开了一种用于导频信号传输的方法和装置。 特别地，利用导频子载波带宽与数据副载波带宽不同的导频传输方案。 因为一些用户的数据子载波将不再具有与它们相邻的用户的导频子载波，导频块使用的子载波的集合或模式在突发中至少改变一次。 在突发中至少改变一次导频块模式（所占用的导频块子载波集合）用于将占用的数据子载波的频率接近度增加到突发中的占用导频子载波。

公开(公告)号：US20070036066A1

公开(公告)日：2007-02-15

申请号：US11419797

申请日：2006-05-23

申请人： Timothy Thomas ,  Kevin Baum ,  Brian Classon ,  Vijay Nangia

发明人： Timothy Thomas ,  Kevin Baum ,  Brian Classon ,  Vijay Nangia

IPC分类号： H04J11/00 ,  H04B3/10

CPC分类号： H04B7/0678 ,  H04L5/0023 ,  H04L5/0048

摘要： A pilot transmission scheme is presented where during a first OFDM symbol period a first pilot sequence is transmitted over a first multiple sub-carriers on a first group of antennas. During a second OFDM symbol period, a second pilot sequence is transmitted over a second multiple sub-carriers on a second group of antennas. The first and the second groups of antennas only transmit one pilot sequence every subframe of M OFDM symbol periods.

摘要翻译： 提出了一种导频传输方案，其中在第一OFDM符号周期期间，在第一组天线上的第一多个子载波上发送第一导频序列。 在第二OFDM符号周期期间，在第二组天线上的第二多个子载波上发送第二导频序列。 第一组和第二组天线只在M个OFDM符号周期的每个子帧上发送一个导频序列。

公开(公告)号：US20050084000A1

公开(公告)日：2005-04-21

申请号：US10945692

申请日：2004-09-21

申请人： Thomas Krauss ,  Kevin Baum ,  Vijay Nangia

发明人： Thomas Krauss ,  Kevin Baum ,  Vijay Nangia

IPC分类号： H04L5/02 ,  H04L27/26 ,  H04B1/707 ,  H04L27/06

CPC分类号： H04L5/0021 ,  H04B7/068 ,  H04L5/0026 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0232 ,  H04L27/2613

摘要： In an OFDM system the same Walsh code is used at the same time for a plurality of transmitters. The multiple transmitters can be from the same, or different devices (e.g., different base stations on the downlink, different terminals on the uplink). Each subcarrier/antenna combination will share a similar pilot Walsh code, except for the fact that the scrambled spread pilot signals will be phase shifted on some subcarriers of some antennas, based on the subcarrier/antenna combination.

摘要翻译： 在OFDM系统中，相同的沃尔什码同时用于多个发射机。 多个发射机可以来自相同或不同的设备（例如，下行链路上的不同基站，上行链路上的不同终端）。 每个子载波/天线组合将共享类似的导频沃尔什码，除了基于副载波/天线组合，扰频扩频导频信号将在一些天线的某些子载波上相移的事实。

公开(公告)号：US20070183307A1

公开(公告)日：2007-08-09

申请号：US11351306

申请日：2006-02-08

申请人： Hidenori Akita ,  Kevin Baum ,  Brian Classon ,  Masaya Fukuta ,  Hiroshi Hayashi ,  Vijay Nangia ,  Robert Love ,  Kenneth Stewart

发明人： Hidenori Akita ,  Kevin Baum ,  Brian Classon ,  Masaya Fukuta ,  Hiroshi Hayashi ,  Vijay Nangia ,  Robert Love ,  Kenneth Stewart

IPC分类号： H04J3/06 ,  H04J11/00

CPC分类号： H04W48/16 ,  H04J11/0073 ,  H04L5/0007 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/266 ,  H04L27/2663

摘要： A method and apparatus is provided for transmitting an orthogonal frequency domain multiple access (OFDMA) signal including a synchronization channel signal transmitted within a localized portion of a bandwidth of the OFDMA signal (818), the synchronization channel signal having predetermined time domain symmetry within the localized portion of the bandwidth (816) and including information for providing at least partial cell identification information (812). The synchronization channel signal enables an initial acquisition and cell search method with low computational load which provides OFDMA symbol timing detection and frequency error detection (1112) and frame boundary detection and cell specific information detection (1114) in an OFDMA system supporting multiple system bandwidths, both synchronized and un-synchronized systems, a large cell index and an OFDMA symbol structure with both short and long cyclic prefix length.

摘要翻译： 提供了一种用于发送包括在OFDMA信号（818）的带宽的局部部分内发送的同步信道信号的正交频域多址（OFDMA）信号的方法和装置，所述同步信道信号具有在 带宽的局部部分（816）并且包括用于提供至少部分小区识别信息的信息（812）。 同步信道信号支持在支持多个系统带宽的OFDMA系统中提供OFDMA符号定时检测和频率误差检测（1112）和帧边界检测和小区特定信息检测（1114）的具有低计算负荷的初始采集和小区搜索方法， 同步和非同步的系统，大的信元索引和具有短和长循环前缀长度的OFDMA符号结构。

公开(公告)号：US20060274839A1

公开(公告)日：2006-12-07

申请号：US11147092

申请日：2005-06-07

申请人： Masaya Fukuta ,  Hiroshi Hayashi ,  Kevin Baum ,  Vijay Nangia

发明人： Masaya Fukuta ,  Hiroshi Hayashi ,  Kevin Baum ,  Vijay Nangia

IPC分类号： H04K1/10

CPC分类号： H04L5/0007 ,  H04L5/0016 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0064 ,  H04L5/008 ,  H04L5/0087

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。