Preamble for a TFI-OFDM communications system
    2.
    发明授权
    Preamble for a TFI-OFDM communications system 有权
    用于TFI-OFDM通信系统的前缀

    公开(公告)号:US07634020B2

    公开(公告)日:2009-12-15

    申请号:US10782095

    申请日:2004-02-19

    IPC分类号: H04L27/00

    摘要: System and method for simplifying preamble detection and reducing power consumption in receivers. A preferred embodiment comprises a preamble made up of two sequences, a first sequence that is specified in the time domain and a second sequence that is specified in the frequency domain. The first sequence which comprises multiple copies of a time domain code sequence can allow easy detection of the preamble while the second sequence comprises multiple copies of a frequency domain code sequence and allows easy determination of the frequency response of the communications channel. A hierarchical sequence can be used to allow multi-stage correlation. This can result in a less complex correlator, hence lower power consumption. Piconets can use different code sequences to allow rapid determination of the source of a transmission without requiring the receiver to decode the entire transmission.

    摘要翻译: 用于简化前导码检测并降低接收机功耗的系统和方法。 优选实施例包括由两个序列组成的前导码,在时域中指定的第一序列和在频域中指定的第二序列。 包括时域码序列的多个副本的第一序列可以容易地检测前置码,而第二序列包括频域码序列的多个副本,并且允许容易地确定通信信道的频率响应。 可以使用分级序列来允许多级相关。 这可能导致较不复杂的相关器,从而降低功耗。 微微网可以使用不同的码序列来快速确定传输源,而不需要接收机对整个传输进行解码。

    Technique for generating carrier frequencies with fast hopping capability
    5.
    发明授权
    Technique for generating carrier frequencies with fast hopping capability 有权
    用于产生具有快速跳变能力的载波频率的技术

    公开(公告)号:US06876262B2

    公开(公告)日:2005-04-05

    申请号:US10626924

    申请日:2003-07-25

    摘要: A technique for generating carrier frequencies with fast hopping capability associated with multiband systems for ultra wideband applications. The technique employs a single VCO 20 that is locked in a PLL 30. The output of this VCO 20 is divided in the frequency domain. The divided frequencies thus obtained are combined in a single-sideband manner to obtain various other frequencies. The single-sideband combination requires open loop operations such as multiplication and addition or subtraction to implement, and hence is very fast. The VCO center frequency is not disturbed in the process. Since the required frequencies are generated in an open-loop fashion, instead of inside a PLL, the speed is increased by orders of magnitude.

    摘要翻译: 用于产生具有与用于超宽带应用的多频带系统相关联的具有快速跳变能力的载波频率的技术。 该技术采用锁定在PLL 30中的单个VCO 20。该VCO 20的输出在频域中被划分。 这样获得的划分频率以单边带方式组合以获得各种其它频率。 单边带组合需要开环操作,例如乘法和加法或减法来实现,因此非常快。 VCO中心频率在此过程中不受干扰。 由于所需的频率是以开环方式产生的,而不是在PLL内部,速度增加了数量级。

    Multi-Band OFDM Communications System
    6.
    发明申请
    Multi-Band OFDM Communications System 有权
    多频带OFDM通信系统

    公开(公告)号:US20100020684A1

    公开(公告)日:2010-01-28

    申请号:US12571735

    申请日:2009-10-01

    IPC分类号: H04W4/00 H04L12/26

    CPC分类号: H04L5/023

    摘要: System and method for providing multiple access in a multi-band, orthogonal frequency division multiplexed (multi-band-OFDM) communications system. A preferred embodiment comprises determining a transmission bandwidth to support a performance requirement and configuring transmission bands in the multi-band-OFDM communications system based upon the transmission bandwidth, wherein the transmission bands may be made up of smaller transmission bands bonded together. Further comprising initializing communications with the configured transmission bands. The use of bonded transmission bands can provide increased data rates and/or increased range performance.

    摘要翻译: 用于在多频带正交频分复用(多频带OFDM)通信系统中提供多址的系统和方法。 优选实施例包括确定传输带宽以支持性能要求,并且基于传输带宽来配置多频带OFDM通信系统中的传输频带,其中传输频带可由较小的传输频带组合在一起。 还包括初始化与配置的传输频带的通信。 使用粘合的传输带可以提供增加的数据速率和/或增加的范围性能。

    Mapping data tones onto guard tones for a multi-band OFDM system
    7.
    发明授权
    Mapping data tones onto guard tones for a multi-band OFDM system 有权
    将数据音调映射到多频带OFDM系统的保护音

    公开(公告)号:US07532565B2

    公开(公告)日:2009-05-12

    申请号:US11021053

    申请日:2004-12-22

    IPC分类号: H04J11/00

    CPC分类号: H04L27/2605 H04B1/7163

    摘要: A device (104, 106, 108) is provided for wireless communication. The device (104, 106, 108) includes a transmitter (200) operable to transmit an orthogonal frequency division multiplex symbol. The orthogonal frequency division multiplex symbol has a first set of copied tones adjacent a first end of the orthogonal frequency division multiplex symbol, a second set of copied tones adjacent a second end of the orthogonal frequency division multiplex symbol, and a plurality of data tones provided between the first and second sets of copied tones. The first and second sets of copied tones include copies of at least some of the plurality of data tones.

    摘要翻译: 提供用于无线通信的设备(104,106,108)。 设备(104,106,108)包括可操作以发送正交频分复用符号的发射机(200)。 正交频分复用符号具有与正交频分多路复用符号的第一端相邻的第一组复制音调,与正交频分复用符号的第二端相邻的第二组复制音和提供的多个数据音 在第一组和第二组复制音之间。 第一和第二组复制音调包括多个数据音调中的至少一些的副本。

    Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing
    8.
    发明申请
    Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing 审中-公开
    在正交频分复用中双载波变换的多功能系统

    公开(公告)号:US20080310538A1

    公开(公告)日:2008-12-18

    申请号:US12198630

    申请日:2008-08-26

    IPC分类号: H04L27/28

    CPC分类号: H04L27/2602 H04B1/7176

    摘要: The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system (200), particularly an ultra-wideband (UWB) system. The present invention provides a data input (202), which passes data to a randomizer (204). The data then passes to a convolutional code function (206), the output of which is punctured by puncturing function (208). An interleaver function (210) receives the punctured code data, and cooperatively operates with a mapper element (218) to prepare the coded data for pre-transmission conversion by an IFFT (220). The mapper element (218) comprises a dual carrier modulation function (216), which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.

    摘要翻译: 本发明提供了一种通用系统,用于在正交频分复用(OFDM)系统(200),特别是超宽带(UWB)系统内的多个载波路径上选择性地扩展载波数据。 本发明提供一种将数据传递给随机发生器(204)的数据输入(202)。 数据然后传递到卷积码功能(206),其输出被穿孔功能(208)打孔。 交织器功能(210)接收穿孔码数据,并与映射器元件(218)协作操作,以通过IFFT(220)准备用于预传输转换的编码数据。 映射器元件(218)包括双载波调制功能(216),其将两个穿孔码数据元素相关联并变换为用于在两个分离的信号音调上传输的格式。

    Versatile system for optimizing data fragmentation in digital communications
    9.
    发明申请
    Versatile system for optimizing data fragmentation in digital communications 有权
    用于优化数字通信中数据碎片的通用系统

    公开(公告)号:US20060034333A1

    公开(公告)日:2006-02-16

    申请号:US11191738

    申请日:2005-07-28

    IPC分类号: H04J3/24

    CPC分类号: H04L27/2608

    摘要: The present invention provides a versatile system for optimizing data fragmentation in a digital communications—particularly OFDM communications—system. A digital transmission system (100) is provided, having a PHY-level constraint. An array (104, 112) of data transmission parameters (106-110, 114-116), relating to the digital transmission system, is provided. A fragmentation construct (102) is provided, and adapted to determine a number of symbols required to transmit a given data transmission payload. The fragmentation construct calculates (118), based on the number symbols required, and on certain parameter information from the array, a number of bytes of data that must be transmitted in the given data transmission payload in order to minimize pad bits added to the data transmission payload.

    摘要翻译: 本发明提供了一种用于优化数字通信(特别是OFDM通信系统)中的数据分段的通用系统。 提供具有PHY级约束的数字传输系统(100)。 提供了与数字传输系统相关的数据传输参数(106-110,114-116)的阵列(104,112)。 提供分段结构(102),并且适于确定发送给定数据传输有效载荷所需的符号数量。 碎片结构基于所需的数字符号计算(118),并根据阵列的某些参数信息计算必须在给定数据传输有效载荷中传输的数据字节数,以便最小化添加到数据中的填充位 传输有效载荷。

    System and method for channelization and data multiplexing in a wireless communication network
    10.
    发明申请
    System and method for channelization and data multiplexing in a wireless communication network 审中-公开
    用于无线通信网络中的信道化和数据复用的系统和方法

    公开(公告)号:US20050180375A1

    公开(公告)日:2005-08-18

    申请号:US11032402

    申请日:2005-01-10

    CPC分类号: H04B1/71632 H04J13/0022

    摘要: A system and method for channelization and data multiplexing in ultra-wideband (UWB) wireless communication system is described. The spectrum allocated for UWB in a multi-band OFDM (orthogonal frequency division multiplex) system is subdivided into various bands. A set of time frequency codes (TFC's) is defined, wherein each code specifies one of a plurality of unique band versus time sequences for a particular band group, for sequential data symbols of a given piconet. The separation of data words from multiple devices or multiple simultaneously operating piconets (SOP's) is provided by a combination of FDMA and TFC's. The combination of FDMA and TFC's provides a simplified interface between the MAC and PHY.

    摘要翻译: 描述了在超宽带(UWB)无线通信系统中的信道化和数据复用的系统和方法。 在多频带OFDM(正交频分复用)系统中为UWB分配的频谱被细分成各种频带。 定义一组时间频率码(TFC),其中每个码指定给定微微网的顺序数据符号的特定频带组的多个唯一频带对时间序列中的一个。 数据字从多个设备或多个同时操作的微微网(SOP)的分离由FDMA和TFC的组合提供。 FDMA和TFC的组合提供了MAC和PHY之间的简化接口。