公开(公告)号：WO2007036866A2

公开(公告)日：2007-04-05

申请号：PCT/IB2006/053475

申请日：2006-09-25

申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  DEMAJ, Pierre

发明人： DEMAJ, Pierre

IPC分类号： H04B7/26 ,  H04L27/00

CPC分类号： H04L27/0014 ,  H04B7/01 ,  H04B17/309 ,  H04L2027/0016 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0065

摘要： A method of estimating a Doppler maximum frequency ƒ d and/or a local oscillator frequency offset ƒ 0 , the method comprising the steps of: - computing (in 76) a power density spectrum of a received radio signal over a whole frequency range, - scanning (in 80) the computed power density spectrum to determine a frequency sub-range [ ƒ min ; ƒ max ] which is not necessarily centered on 0 Hz, the signal power over the sub-range [ ƒ min ; ƒ max ] being equal to a predetermined percentage of the signal power over the whole frequency range, and - estimating (in 82) frequency ƒ d and/or offset ƒ 0 from frequencies ƒ min and ƒ max .

摘要翻译： 一种估计多普勒最大频率的方法

公开(公告)号：WO2007015828A2

公开(公告)日：2007-02-08

申请号：PCT/US2006/027759

申请日：2006-07-19

申请人： QUALCOMM FLARION TECHNOLOGIES, INC. ,  LANE, Frank, A. ,  LAROIA, Rajiv ,  LI, Junyi

发明人： LANE, Frank, A. ,  LAROIA, Rajiv ,  LI, Junyi

IPC分类号： H04B7/26

CPC分类号： H04W4/02 ,  H04B7/01 ,  H04W56/0025 ,  H04W56/0035 ,  H04W56/006 ,  H04W64/00 ,  H04W88/005 ,  H04W92/10

摘要： A wireless terminal receives base station position over an airlink, determines its relative position with respect to the base station and determines a timing adjustment correction. The wireless terminal applies the determined timing correction to control uplink signaling timing and achieve synchronization at the base station's receiver. The wireless terminal determines its relative velocity with respect to the base station and determines a Doppler shift adjustment which it adds to the uplink carrier frequency or to its baseband signal. A wireless terminal determines the position of a moving base station and determines timing and/or frequency corrections. Base station position is determined from the current time and stored information correlating the base station position with time, e.g. , for a geo-synchronous satellite. Base station position information is determined from broadcast information, e.g. , GPS base station position, for an aircraft base station. Wireless terminals may be mobile and include a GPS receiver for WIRELESS TERMINAL position determination.

摘要翻译： 无线终端通过空中链路接收基站位置，确定其相对于基站的相对位置，并确定定时调整校正。 无线终端应用所确定的定时校正以控制上行链路信令定时，并在基站的接收机处实现同步。 无线终端确定其相对于基站的相对速度，并确定其添加到上行链路载波频率或其基带信号的多普勒频移调整。 无线终端确定移动基站的位置并确定定时和/或频率校正。 基站位置是从当前时间确定的，并存储与基站位置和时间相关的信息，例如用于地理同步卫星。 从飞机基站的广播信息（例如，GPS基站位置）确定基站位置信息。 无线终端可以是移动的，并且包括用于WIRELESS TERMINAL位置确定的GPS接收器。

公开(公告)号：WO2007003715A1

公开(公告)日：2007-01-11

申请号：PCT/FI2006/050309

申请日：2006-07-03

申请人： NOKIA CORPORATION ,  SUNDARALINGAM, Sathiaseelan ,  HASAN, Khairul ,  JONES, Eric ,  SÄILY, Mikko

发明人： SUNDARALINGAM, Sathiaseelan ,  HASAN, Khairul ,  JONES, Eric ,  SÄILY, Mikko

IPC分类号： H04B17/00 ,  G01S11/10

CPC分类号： H04B7/01 ,  G01S11/10

摘要： A speed detection method in a communications system, a receiver, a network element, and a processor, the processor comprising, for example, means for determining a predetermined number of frequency estimates, means for determining an average of the frequency estimates for obtaining an averaged frequency offset (300), means for unbiasing received samples and/or impulse response values using the averaged frequency offset (300), means for calculating Doppler frequency estimates using the unbiased received samples and/or impulse response values (302) and means for calculating selected second order statistics of the Doppler frequency estimates over a predetermined period (304).

摘要翻译： 在通信系统，接收机，网络元件和处理器中的速度检测方法，所述处理器包括例如用于确定预定数量的频率估计的装置，用于确定用于获得平均值的频率估计的平均值的装置 频率偏移（300），用于使用平均频率偏移（300）对接收样本和/或脉冲响应值进行非偏置的装置，用于使用所述无偏差接收样本和/或脉冲响应值（302）计算多普勒频率估计的装置和用于计算 在预定时段内多普勒频率估计的选择的二阶统计（304）。

公开(公告)号：WO2006131250A1

公开(公告)日：2006-12-14

申请号：PCT/EP2006/005190

申请日：2006-05-31

申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  WILHELMSSON, Leif

发明人： WILHELMSSON, Leif

IPC分类号： H04B7/005 ,  H04L27/26

CPC分类号： H04W52/42 ,  H04B7/01 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0062 ,  H04L5/0066 ,  H04L5/0085 ,  H04L5/0096 ,  H04L27/2657 ,  H04W52/282 ,  H04W52/346

摘要： Digital data Symbols from a transceiver are transmitted to at least two remote transceivers in a wireless Communications System employing Orthogonal Frequency Division Multiplexing, wherein a number of available sub-carriers are shared between said remote transceivers. Information about magnitudes of Doppler effect experienced by the remote transceivers is provided; sub-carriers are allocated to each remote transceiver in dependence of the information about magnitudes of Doppler effect; and a power level transmitted to each of said remote transceivers is controlled in dependence of the Information about magnitudes of Doppler effect. In this way the reception of OFDM Signals for transceivers moving at high speed and thus experiencing a high Doppler effect is improved without degrading the reception quality for transceivers with low or no Doppler effect. Thus the Performance of a System based on OFDM and multiple access is improved.

摘要翻译： 数字数据来自收发器的符号在采用正交频分复用的无线通信系统中的至少两个远程收发机传输，其中在所述远程收发器之间共享多个可用子载波。 提供有关远程收发器所经历的多普勒效应的大小的信息; 根据关于多普勒效应的大小的信息，将子载波分配给每个远程收发器; 并且根据关于多普勒效应的幅度的信息来控制发送到每个所述远程收发器的功率电平。 以这种方式，改善了用于收发机高速移动并因此经历高多普勒效应的OFDM信号的接收，而不降低具有低或无多普勒效应的收发器的接收质量。 因此，提高了基于OFDM和多路访问的系统的性能。

公开(公告)号：WO2006026486A2

公开(公告)日：2006-03-09

申请号：PCT/US2005/030515

申请日：2005-08-25

申请人： L-3 INTEGRATED SYSTEMS COMPANY ,  COLLING, James F.

发明人： COLLING, James F.

IPC分类号： H04Q7/20

CPC分类号： H04B7/01 ,  H04B17/3912

摘要： Multiple cochannel AM signals received in an overloaded signal environment may be separated using RF data through a method of iterative projections.

摘要翻译： 在过载的信号环境中接收的多个信道AM信号可以使用RF数据通过迭代投影的方法来分离。

公开(公告)号：WO02063814A8

公开(公告)日：2005-02-17

申请号：PCT/US0202953

申请日：2002-01-31

申请人： WISCOM TECHNOLOGIES INC

发明人： KUO WEN-YI

IPC分类号： H04B1/707 ,  H04B7/01 ,  H04L25/02 ,  H04K1/00

CPC分类号： H04B7/01 ,  H04B1/70754 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/712 ,  H04B2201/70701 ,  H04L25/0228

公开(公告)号：WO2002078221A1

公开(公告)日：2002-10-03

申请号：PCT/JP2002/000965

申请日：2002-02-06

申请人： 三菱電機株式会社 ,  元吉 克幸

发明人： 元吉 克幸

IPC分类号： H04B17/00

CPC分类号： H04L25/0202 ,  G01S11/10 ,  H04B7/01 ,  H04B17/336

摘要： A propagation variation estimating device for estimating a variation of a radio propagation path characteristic due to Doppler shift fading by estimating a maximum Doppler frequency by Fourier transformation of a reference signal included in a reception signal, comprising, for example, a threshold judging section (104) for comparing the magnitude of a maximum past Doppler frequency estimate with a predetermined threshold and judging which is larger, an FFT point selection section (105) for reducing the sample frequency and the number of samples of the Fourier transform if the result of the comparison shows that the maximum Doppler frequency estimate is smaller than the threshold, and an FFT section (101).

摘要翻译： 一种传播变化估计装置，用于通过对包括在接收信号中的参考信号进行傅里叶变换来估计最大多普勒频率来估计由于多普勒频移衰落引起的无线电传播路径特性的变化，包括例如阈值判定部分 ），用于将最大过去多普勒频率估计的幅度与预定阈值进行比较，并且判断哪个较大者;如果比较结果，则用于减少采样频率和傅里叶变换的样本数量的FFT点选择部分（105） 示出了最大多普勒频率估计小于阈值，以及FFT部分（101）。

公开(公告)号：WO0241518A3

公开(公告)日：2002-07-25

申请号：PCT/SE0102524

申请日：2001-11-13

申请人： ERICSSON TELEFON AB L M

发明人： LINDBOM LARS ,  ZANGI KAMIBZ

IPC分类号： H04B7/01 ,  H04L27/00

CPC分类号： H04L27/0014 ,  H04B7/01 ,  H04L2027/003 ,  H04L2027/0042 ,  H04L2027/0055

摘要： The present invention is directed toward an automatic frequency control system for compensating for frequency offset of received data signals in a radio frequency communication system. A reference sample index for the data to be compensated is first determined as a function of the transmission channel and known training data. A scaled phase error estimate is calculated along with a time-varying filter parameter. From the scaled phase error estimate and the filter parameter, a frequency offset estimate and a phase drift estimate are calculated. The system proceeds through the time-indexed, received data signals until the entire received batch of data signals has been processed, and the corresponding compensated soft data has been output.

摘要翻译： 本发明涉及一种用于补偿射频通信系统中接收到的数据信号的频率偏移的自动频率控制系统。 首先根据传输信道和已知的训练数据确定待补偿数据的参考样本索引。 缩放的相位误差估计与时变滤波器参数一起计算。 根据缩放的相位误差估计和滤波器参数，计算频率偏移估计和相位漂移估计。 系统通过时间索引的接收数据信号进行处理，直到整个接收到的一批数据信号已经被处理，并且相应的补偿软数据已经被输出。

公开(公告)号：WO0223765A3

公开(公告)日：2002-06-27

申请号：PCT/DE0103506

申请日：2001-09-12

申请人： SIEMENS AG ,  HAARDT MARTIN

发明人： HAARDT MARTIN

IPC分类号： H04B7/01 ,  H04B7/04

CPC分类号： H04B7/01 ,  H04B7/0408

摘要： The invention relates to a method for transmitting signals inside a radio communications system according to which signals are transmitted from a base station (BS) by means of a first adaptive antenna device. The signals transmitted from the base station (BS) are received by a transmitting/receiving device (MT1, MT2) by means of a second adaptive antenna device. Discrete Doppler shifts for the signals received by means of the second adaptive antenna device are determined inside a signal processing device (DSP1, DSP2). Original signals associated with the signals received by means of the second adaptive antenna device are reconstructed based on the determined discrete Doppler shifts. The reconstructed original signals are transmitted from the signal processing device (DSP1, DSP2) to at least one subscriber station (UE1-UE4) via a wireless and/or wire-bound interface (IF1, IF2).

摘要翻译： 本发明涉及一种用于在无线电通信系统中信号发送的方法被传输，其中从基站（BS）通过第一自适应天线装置的信号的装置。 从基站（BS）发送的信号由发送接收/第二自适应天线装置的装置接收装置（MT1，MT2）。 在信号处理装置（DSP1，DSP2）离散多普勒频移对所接收的由所述第二自适应天线装置信号的装置检测到。 通过相关联的Originärsignale多普勒频移所述第二自适应天线设备的信号的装置所接收到的是基于所确定的离散的重建。 重构Originärsignale通过从信号处理装置（DSP1，DSP2）的无线和/或有线接口（IF1，IF2）被发送到至少一个用户站（UE1-UE4）。

公开(公告)号：WO02037136A1

公开(公告)日：2002-05-10

申请号：PCT/CN2000/000355

申请日：2000-10-23

IPC分类号： H04B7/01 ,  G01S13/50 ,  H04B7/26 ,  H04Q7/34

CPC分类号： H04B7/01

摘要： The invention discloses a method of measuring the Doppler frequency-shifts which is applied to digital mobile communication system and the device which accomplishes the method. The channel estimating information is filtered by the method, the filtered information is then calculated to get the absolute value of its first derivative. During the time, add up the above calculated results and get its average value, then combine the maximum ratio by the Doppler frequency-shifts determined by the every branch of the RAKE receiver and determine the end measuring value of the Doppler frequency-shifts. The method can be accomplished simply and can be applied widely. It also can be used for the technology used in CDMA mobile communication system such as channel estimate, power control, and switch. It can improve the performance of the receiver and capacity of the system.