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    Method and system for acquiring ultra-wide-bandwidth communications signals using average block searches
    32.
    发明授权
    Method and system for acquiring ultra-wide-bandwidth communications signals using average block searches 失效
    使用平均块搜索获取超宽带通信信号的方法和系统

    公开(公告)号：US07164720B2

    公开(公告)日：2007-01-16

    申请号：US10426576

    申请日：2003-04-30

    申请人： Andreas Molisch ,  Sinan Gezici ,  Hisashi Kobayashi ,  H. Vincent Poor

    发明人： Andreas Molisch ,  Sinan Gezici ,  Hisashi Kobayashi ,  H. Vincent Poor

    IPC分类号： H04L27/00

    CPC分类号： H04B1/7183

    摘要： A method and system acquire a received impulse radio signal by correlating a region, including a plurality of cells, of the received impulse radio signal using multiple time-shifted template signals, each template signal having a different delay to obtain a correlation value for each template signal. The correlation values are averages, and a particular delay associated with a particular template signal having a substantial increase in successive averages to locate a signal cell in the region.

    摘要翻译： 一种方法和系统通过使用多个时移模板信号将接收到的脉冲无线电信号的包括多个小区的区域相关联来获取接收到的脉冲无线电信号，每个模板信号具有不同的延迟以获得每个模板的相关值 信号。 相关值是平均值，以及与特定模板信号相关联的特定延迟，其具有连续平均值的显着增加以定位该区域中的信号单元。

    Linear receivers for time-hopping impulse radio systems
    34.
    发明申请
    Linear receivers for time-hopping impulse radio systems 失效
    用于跳时脉冲无线电系统的线性接收机

    公开(公告)号：US20060146915A1

    公开(公告)日：2006-07-06

    申请号：US10847072

    申请日：2004-05-17

    申请人： Sinan Gezici ,  Andreas Molisch ,  Hisashi Kobayashi ,  H. Poor

    发明人： Sinan Gezici ,  Andreas Molisch ,  Hisashi Kobayashi ,  H. Poor

    IPC分类号： H04B1/69

    CPC分类号： H04B1/71637 ,  H04B2001/6908

    摘要： In a time-hopped impulse radio system, each symbol is transmitted over a channel having different multipath components as a set of Nf frames. Each frame includes one pulse. All frames of a received signal corresponding to the symbol are sampled to generate Nfa×L samples, where L is the number of samples for each frame. Then, the Nfa×L samples are combined according to a minimum mean square error criterion to obtain a decision variable corresponding to the symbol.

    摘要翻译： 在时间跳跃的无线电系统中，每个符号通过具有不同多路径分量的信道作为一组N帧帧发送。 每帧包括一个脉冲。 对与该符号相对应的接收信号的所有帧进行采样以产生N×L×L个采样，其中L是每帧的样本数。 然后，根据最小均方误差准则组合N个样本，以获得对应于该符号的判定变量。

    System and method for shaping ultra wide bandwidth signal spectrum
    35.
    发明授权
    System and method for shaping ultra wide bandwidth signal spectrum 有权
    用于整形超宽带宽信号频谱的系统和方法

    公开(公告)号：US07324604B2

    公开(公告)日：2008-01-29

    申请号：US10602743

    申请日：2003-06-24

    申请人： Andreas Molisch ,  Yunnan Wu ,  Sun Y. Kung

    发明人： Andreas Molisch ,  Yunnan Wu ,  Sun Y. Kung

    IPC分类号： H04K1/02

    CPC分类号： H04B1/7172

    摘要： A method and system shapes a spectrum of an impulse radio signal, such as an UWB signal. First, basis pulses at various frequencies and pseudo-random delays are generated. The generated set of basis pulses are then weighted and delayed, and combined linearly to conform the spectrum of the transmitted basis pulses to a spectral mask. The spectral mask can be predetermined, or the conforming can be adaptive. Furthermore, the basis pulses can be frequency-shifted before the combining.

    摘要翻译： 一种方法和系统对诸如UWB信号的脉冲无线电信号的频谱进行整形。 首先，生成各种频率的基本脉冲和伪随机延迟。 所生成的基准脉冲集合然后被加权和延迟，并且线性地组合以使所发送的基本脉冲的频谱符合频谱掩模。 光谱掩模可以是预定的，或者符合可以是自适应的。 此外，基准脉冲可以在组合之前进行频移。

    OFDM receiver for detecting FSK modulated signals
    36.
    发明授权
    OFDM receiver for detecting FSK modulated signals 失效
    用于检测FSK调制信号的OFDM接收机

    公开(公告)号：US07154956B2

    公开(公告)日：2006-12-26

    申请号：US10624771

    申请日：2003-07-22

    申请人： Andreas Molisch ,  Yves-Paul Nakache

    发明人： Andreas Molisch ,  Yves-Paul Nakache

    IPC分类号： H04K1/10 ,  H04L27/14

    CPC分类号： H04L27/261 ,  H04L27/2647

    摘要： An OFDM receiver detects FSK symbols in a communications network. An FFT has an input connected to receive temporal samples of a received, frequency-hopped FSK signal. Outputs of the FFT represent the FSK signal in a frequency domain. The outputs are grouped according to predetermined frequencies assigned by a transmitter of the FSK signal. An energy for each group of outputs is determined, and the energies of each group are then compared to recover a data stream from the FSK signal.

    摘要翻译： OFDM接收机检测通信网络中的FSK符号。 FFT具有连接的输入以接收接收的跳频FSK信号的时间采样。 FFT的输出表示频域中的FSK信号。 输出根据由FSK信号的发射机分配的预定频率进行分组。 确定每组输出的能量，然后比较每组的能量以从FSK信号中恢复数据流。

    Training frames for MIMO stations
    37.
    发明申请
    Training frames for MIMO stations 失效
    MIMO站的训练帧

    公开(公告)号：US20060274847A1

    公开(公告)日：2006-12-07

    申请号：US11127006

    申请日：2005-05-11

    申请人： Andreas Molisch ,  Jianxuan Du ,  Daqing Gu

    发明人： Andreas Molisch ,  Jianxuan Du ,  Daqing Gu

    IPC分类号： H04L1/02

    CPC分类号： H04B7/0691 ,  H04B7/02 ,  H04B7/0874

    摘要： A method transmits transmitting training frames in a MIMO system. A long sequence of training frames is transmitted from a station B to a station A via a channel of the MIMO system, in which the station A includes NA antennas and N—SS RF chains and the station B includes NB antennas and NB—SS RF chains, and a number of frames in the long sequence of training frames is at least equal to A short sequence of training frames is transmitted from the station A to the station B via the channel in response to receiving the long sequence of training frames. A number of frames in the short training sequence is at least equal to

    摘要翻译： 一种在MIMO系统中发送训练帧的方法。 训练帧的长序列经由MIMO系统的信道从站B发送到站A，其中，站A包括NA天线，并且N - SUB> SS RF链，并且站B包括N个B个天线和N B个天线，并且N B个< SUB> SS RF链，并且训练帧的长序列中的多个帧至少等于A响应于接收，经由信道从站A向站B发送短序列的训练帧 训练框架的长序列。 短训练序列中的多个帧至少等于

    Method for estimating time of arrival of received signals for ultra wide band impulse radio systems
    38.
    发明申请
    Method for estimating time of arrival of received signals for ultra wide band impulse radio systems 失效
    用于估计超宽带脉冲无线电系统的接收信号的到达时间的方法

    公开(公告)号：US20060104387A1

    公开(公告)日：2006-05-18

    申请号：US10988764

    申请日：2004-11-15

    申请人： Zafer Sahinoglu ,  Sinan Gezici ,  Andreas Molisch

    发明人： Zafer Sahinoglu ,  Sinan Gezici ,  Andreas Molisch

    IPC分类号： H04L27/06

    CPC分类号： H04B1/7183

    摘要： A method estimates a time of arrival of a signal received in a wireless communication system. An energy in a frame of a received signal is measured to determine a block in the frame, the block representing a coarse time of arrival of the received signal. Multiple time-delayed versions of a template signal are combined with the block of the received signal to select a particular template signal. The particular template signal identifies a particular chip representing a fine time of arrival of the received signal.

    摘要翻译： 方法估计在无线通信系统中接收的信号的到达时间。 测量接收信号的帧中的能量以确定帧中的块，该块表示接收信号的粗略到达时间。 模板信号的多个时间延迟版本与接收信号的块组合以选择特定的模板信号。 特定模板信号识别表示接收信号的精确到达时间的特定芯片。

    CHANNEL ESTIMATION IN AN OFDM TRANSMISSION SYSTEM
    40.
    发明申请
    CHANNEL ESTIMATION IN AN OFDM TRANSMISSION SYSTEM 审中-公开
    OFDM传输系统中的信道估计

    公开(公告)号：US20120140835A1

    公开(公告)日：2012-06-07

    申请号：US13294555

    申请日：2011-11-11

    申请人： Nicolai Czink ,  Thomas Zemen ,  Laura Bernadó ,  Andreas Molisch

    发明人： Nicolai Czink ,  Thomas Zemen ,  Laura Bernadó ,  Andreas Molisch

    IPC分类号： H04B15/00 ,  H04L27/28

    CPC分类号： H04L25/0226 ,  H04L25/0222 ,  H04L25/0234 ,  H04L27/2605

    摘要： A method of channel estimation in an OFDM transmission system having a transmitter and a receiver according to standard IEEE 802.11x. The method includes: in the transmitter, setting an identifier in a reserved bits section of the header following the preamble in a physical layer frame; attaching a postamble at the end of said frame without altering the length information in the header; transmitting said frame over the channel, in the receiver, receiving a frame over the channel and checking a reserved bits section in the header of the received frame for the presence of the identifier; and if the identifier is detected, using the postamble and the preamble of the received frame to estimate the channel.

    摘要翻译： 一种具有根据标准IEEE 802.11x的发射机和接收机的OFDM传输系统中的信道估计方法。 该方法包括：在发射机中，在物理层帧中的前同步码之后的标题的保留比特部分中设置标识符; 在所述帧的末尾附加后同步码，而不改变报头中的长度信息; 在所述接收机中通过所述信道发送所述帧，在所述信道上接收帧，并且检查所述接收帧的报头中的保留位部分以存在所述标识符; 并且如果检测到标识符，则使用后同步码和所接收的帧的前导码来估计信道。