公开(公告)号：EP1529350B1

公开(公告)日：2008-01-16

申请号：EP03810340.4

申请日：2003-11-07

申请人： Dspace Pty Ltd

发明人： PEAKE, Michael Robert ,  RICE, Mark

IPC分类号： H04B1/76 ,  H04B1/10 ,  H04L25/02

CPC分类号： H04B1/76 ,  H04L25/0226 ,  H04L2027/0097

摘要： This invention relates to signal processing in telecommunications, particularly but not exclusively for use in wireless TDMA systems. In particular, the invention concerns methods for use in communication systems making use of pilot symbols. The invention provides a method of placing pilot symbols in a data stream for telecommunication systems, wherein the pilot symbols are spaced in time using a range of different intervals between symbols. The intervals between the pilot symbols are substantially fractal in nature, the distribution of pilot symbols involving repetitions of irregular groupings of pilot symbols in the data stream. Preferably, the irregular groupings of pilot symbols are irregularly spaced in the data stream. The invention also provides a method and means for acquiring the time and frequency offset of a packet of data by using pilot symbols distributed within the packet as defined above.

公开(公告)号：EP1243113A1

公开(公告)日：2002-09-25

申请号：EP00993675.8

申请日：2000-12-15

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)

发明人： ATARIUS, Roozbeh ,  RAMESH, Rajaram

IPC分类号： H04L27/233 ,  H04L27/227

CPC分类号： H04L27/0014 ,  H04L2027/0065 ,  H04L2027/0097

摘要： A method and apparatus estimate an offset between a carrier frequency of a transmitter and a local reference frequency of a receiver. A received signal is separated into frequency synchronization signals and data, and a determination is made whether the frequency synchronization signals are adequate for estimating the frequency offset. This determination may be made based on, e.g., an estimated Doppler spread, an estimated signal to noise ratio, and/or an available amount of frequency offset estimation time. The frequency offset is estimated based on the determination results. If the frequency synchronization signals are adequate for estimating the frequency offset, the frequency synchronization signals are used for determining the frequency offset. Otherwise, the rate of the frequency synchronization signals is increased, e.g., by using the data as frequency synchronization signals, in which case the data is combined with the frequency synchronization signals to determine the frequency offset.

公开(公告)号：EP3142278A4

公开(公告)日：2017-05-17

申请号：EP14891460

申请日：2014-09-01

申请人： ZTE CORP

发明人： CHEN ZEWEI ,  DAI BO ,  LI YU NGOK ,  ZUO ZHISONG ,  XU JUN ,  XIA SHUQIANG

IPC分类号： H04L1/00

CPC分类号： H04L27/36 ,  H03C7/02 ,  H04L1/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/003 ,  H04L25/03866 ,  H04L29/0651 ,  H04L29/08108 ,  H04L2001/0092 ,  H04L2027/0097

摘要： The present invention provides a modulation processing method and apparatus for high-order coding, a base station and a terminal, herein the method includes: a base station selecting a Modulation and Coding Scheme (MCS) table according to a transmission type and predefined information, herein the MCS table includes a MCS table supporting a M-order modulation and a MCS table not supporting a M-order modulation, herein M>64; and the base station transmitting downlink control signaling to a terminal, the downlink control signaling including a modulation and coding scheme field I MCS , herein the I MCS is based on the MCS table supporting or not supporting a M-order modulation selected by the base station. With the above technical solutions according to the present invention, the technical problem in the related art that the conventional table cannot support a higher-order modulation is solved, thereby achieving transmission between the base station and the terminal based on the higher-order modulation.

摘要翻译： 本发明提供了一种高阶编码的调制处理方法和装置，基站和终端，该方法包括：基站根据传输类型和预定义信息选择调制编码方式（MCS，Modulation and Coding Scheme）表， 这里MCS表格包括支持M阶调制的MCS表格和不支持M阶调制的MCS表格，这里M> 64; 基站向终端发送下​​行控制信令，该下行控制信令包括调制编码方式字段I MCS，这里的I MCS是基于支持或不支持基站选择的M阶调制的MCS表格 。 采用本发明上述技术方案，解决了现有技术中无法支持高阶调制的现有技术存在的技术问题，从而实现了基站与终端之间基于高阶调制的传输。

公开(公告)号：EP3142278A1

公开(公告)日：2017-03-15

申请号：EP14891460.9

申请日：2014-09-01

申请人： ZTE Corporation

发明人： CHEN, Zewei ,  DAI, Bo ,  LI, Yu Ngok ,  ZUO, Zhisong ,  XU, Jun ,  XIA, Shuqiang

IPC分类号： H04L1/00

CPC分类号： H04L27/36 ,  H03C7/02 ,  H04L1/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/003 ,  H04L25/03866 ,  H04L29/0651 ,  H04L29/08108 ,  H04L67/04 ,  H04L2001/0092 ,  H04L2027/0097 ,  H04W72/042

摘要： The present invention provides a modulation processing method and apparatus for high-order coding, a base station and a terminal, herein the method includes: a base station selecting a Modulation and Coding Scheme (MCS) table according to a transmission type and predefined information, herein the MCS table includes a MCS table supporting a M-order modulation and a MCS table not supporting a M-order modulation, herein M>64; and the base station transmitting downlink control signaling to a terminal, the downlink control signaling including a modulation and coding scheme field I MCS , herein the I MCS is based on the MCS table supporting or not supporting a M-order modulation selected by the base station. With the above technical solutions according to the present invention, the technical problem in the related art that the conventional table cannot support a higher-order modulation is solved, thereby achieving transmission between the base station and the terminal based on the higher-order modulation.

摘要翻译： 本发明提供了一种调制处理方法和装置用于高次编码，在基站和一个终端，在该方法包括：基站选择调制和编码方案（MCS）表雅丁到透射型和预定义的信息， 在MCS表包括MCS表支持M阶调制和MCS表不支持M阶调制，在M> 64; 和基站发送下行链路控制信令给终端，在下行控制信令包括调制和编码方案字段I MCS，在I MCS是基于所述MCS表支持或不支持由所述基站选择的M阶调制 ， 与雅丁到本发明的上述技术方案，在相关技术中的技术问题，DASS死常规表不能支持更高阶的调制被解决，从而基于高阶调制实现在基站与终端之间的传输。

公开(公告)号：EP1889372A2

公开(公告)日：2008-02-20

申请号：EP06760450.4

申请日：2006-05-24

申请人： QUALCOMM INCORPORATED

发明人： WALTON, Jay Rodney ,  WALLACE, Mark S.

IPC分类号： H04B1/00

CPC分类号： H04L1/0072 ,  H04B1/7073 ,  H04B1/7075 ,  H04L1/0045 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/0228 ,  H04L27/0006 ,  H04L27/0014 ,  H04L2027/0038 ,  H04L2027/0065 ,  H04L2027/0097

摘要： Techniques for detecting and demodulating a signal/transmission are described. Signal detection is performed in multiple stages using different types of signal processing, e.g., using time-domain correlation for a first stage, frequency-domain processing for a second stage, and time-domain processing for a third stage. For the first stage, products of symbols are generated for at least two different delays, correlation between the products for each delay and known values is performed, and correlation results for all delays are combined and used to declare the presence of a signal. For demodulation, the timing of input samples is adjusted to obtain timing-adjusted samples. A frequency offset is estimated and removed from the timing-adjusted samples to obtain frequency-corrected samples, which are processed with a channel estimate to obtain detected symbols. The phases of the detected symbols are corrected to obtain phase-corrected symbols, which are demodulated, deinterleaved, and decoded.

摘要翻译： 描述用于检测和解调信号/传输的技术。 使用不同类型的信号处理，例如使用第一级的时域相关性，第二级的频域处理和第三级的时域处理，来进行信号检测。 对于第一阶段，产生符号的产品至少两个不同的延迟，对于每个延迟和已知值执行产品之间的相关性，并且将所有延迟的相关结果组合并用于声明信号的存在。 为了进行解调，调整输入样本的定时以获得经时间调整的样本。 从定时调整样本估计和去除频率偏移，以获得频率校正的采样，其采用信道估计来处理以获得检测到的符号。 对检测到的符号的相位进行校正，以获得解调，解交织和解码的相位校正符号。

公开(公告)号：EP2582056B1

公开(公告)日：2016-03-23

申请号：EP12006154.4

申请日：2006-05-24

申请人： QUALCOMM INCORPORATED

发明人： Walton, Jay Rodney ,  Wallace, Mark S.

IPC分类号： H04B1/00 ,  H04B1/7073 ,  H04B1/7075 ,  H04L25/02 ,  H04L1/00 ,  H04L27/00

CPC分类号： H04L1/0072 ,  H04B1/7073 ,  H04B1/7075 ,  H04L1/0045 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/0228 ,  H04L27/0006 ,  H04L27/0014 ,  H04L2027/0038 ,  H04L2027/0065 ,  H04L2027/0097

摘要： Techniques for detecting and demodulating a signal/transmission are described. Signal detection is performed in multiple stages using different types of signal processing, e.g., using time-domain correlation for a first stage, frequency-domain processing for a second stage, and time-domain processing for a third stage. For the first stage, products of symbols are generated for at least two different delays, correlation between the products for each delay and known values is performed, and correlation results for all delays are combined and used to declare the presence of a signal. For demodulation, the timing of input samples is adjusted to obtain timing-adjusted samples. A frequency offset is estimated and removed from the timing-adjusted samples to obtain frequency-corrected samples, which are processed with a channel estimate to obtain detected symbols. The phases of the detected symbols are corrected to obtain phase-corrected symbols, which are demodulated, deinterleaved, and decoded.

公开(公告)号：EP2582056A1

公开(公告)日：2013-04-17

申请号：EP12006154.4

申请日：2006-05-24

申请人： QUALCOMM INCORPORATED

发明人： Walton, Jay Rodney ,  Wallace, Mark S.

IPC分类号： H04B1/00 ,  H04B1/7073 ,  H04B1/7075 ,  H04L25/02 ,  H04L1/00 ,  H04L27/00

CPC分类号： H04L1/0072 ,  H04B1/7073 ,  H04B1/7075 ,  H04L1/0045 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/0228 ,  H04L27/0006 ,  H04L27/0014 ,  H04L2027/0038 ,  H04L2027/0065 ,  H04L2027/0097

摘要： Techniques for detecting and demodulating a signal/transmission are described. Signal detection is performed in multiple stages using different types of signal processing, e.g., using time-domain correlation for a first stage, frequency-domain processing for a second stage, and time-domain processing for a third stage. For the first stage, products of symbols are generated for at least two different delays, correlation between the products for each delay and known values is performed, and correlation results for all delays are combined and used to declare the presence of a signal. For demodulation, the timing of input samples is adjusted to obtain timing-adjusted samples. A frequency offset is estimated and removed from the timing-adjusted samples to obtain frequency-corrected samples, which are processed with a channel estimate to obtain detected symbols. The phases of the detected symbols are corrected to obtain phase-corrected symbols, which are demodulated, deinterleaved, and decoded.

摘要翻译： 描述了用于检测和解调信号/传输的技术。 使用不同类型的信号处理在多个阶段中执行信号检测，例如，对第一阶段使用时域相关，对第二阶段使用频域处理，以及对第三阶段使用时域处理。 对于第一阶段，为至少两个不同的延迟生成符号乘积，执行每个延迟的乘积与已知值之间的相关性，并将所有延迟的相关结果组合并用于声明存在信号。 对于解调，调整输入采样的时序以获得时序调整的采样。 估计频率偏移并从定时调整的样本中移除频率偏移以获得频率校正的样本，其用信道估计来处理以获得检测到的符号。 检测到的码元的相位被校正以获得经相位校正的码元，其被解调，解交织和解码。

公开(公告)号：EP1739907A1

公开(公告)日：2007-01-03

申请号：EP05291403.3

申请日：2005-06-29

申请人： Nortel Networks Limited

发明人： Ben Rached, Nidham ,  Lucidarme, Thierry

IPC分类号： H04L25/02 ,  H04L27/26

CPC分类号： H04L25/0226 ,  H04L5/1438 ,  H04L27/261 ,  H04L2027/0097

摘要： For communicating between a transmitter unit (1) and a receiver unit (2) over a communication channel using a predetermined modulation scheme, an amount of pilot symbols is selected depending on an indication of demodulator type available in the receiver unit to operate according to the predetermined modulation scheme. A set of digital symbols is modulated according to the predetermined modulation scheme to generate a modulated signal in the transmitter unit, the digital symbol set including information symbols and the selected amount of pilot symbols.

摘要翻译： 用于使用预定的调制方案的发射器单元（1）和一个接收器单元（2）通过通信信道之间进行通信，在导频符号的量被选择DEPENDING ON解调器类型的指示，可以在接收机单元来操作雅丁到的 规定的调制方式。 一组数字码元被调制gemäß到预定的调制方案，以产生在发射器单元的调制信号，该数字符号集包括信息符号和导频符号的选定量。

公开(公告)号：EP0291947A2

公开(公告)日：1988-11-23

申请号：EP88107951.1

申请日：1988-05-18

申请人： NEC CORPORATION

发明人： Yoshihara, Masashi

IPC分类号： H04L27/22

CPC分类号： H04L27/2273 ,  H04L2027/003 ,  H04L2027/0097

摘要： The demodulator is basically constituted by mixers (2) and (3), low pass filters (LPFs) (4) and (5), A/D converters (6) and (7), a clock recovery circuit (8), a phase error detec­ting circuit (9), a digital-to-analog (D/A) converter (10), a loop filter (11), a voltage adder (12), a sweep controller (13′), a voltage controlled oscillator (VCO) (14), a 90° phase shifter (15), and an error correction/synchronization decision circuit (16). Connected between the sweep control­ler (13′) and the D/A converter (10) are a high pass filter (HPF) (101), a detector (102), and a comparator (103). The error correction/synchronization decision circuit (16) de­termines whether synchronization has been established, whereupon the sweep controller (13′) stops generating a sweep signal and holds its output at a predetermined level. In the event of false synchronization, a beat component is superposed on the output (error voltage) of the D/A conver­ter (10). The detector (102) detects the input beat compo­nent signal. Receiving an output of the detector (102), the comparator (103) compares the output of the detector (102) with a predetermined reference voltage. When the output of the detector (102) is higher than the reference voltage, the comparator (103) feeds the previously mentioned control sig­nal to the sweep controller (13′) . As a result, the sweep controller (13′) resumes the generation of a sweep signal, i.e., the false synchronization is cancelled.

摘要翻译： 解调器基本上由混频器（2）和（3），低通滤波器（LPF）（4）和（5），A / D转换器（6）和（7），时钟恢复电路（8）， 相位误差检测电路（9），数模（D / A）转换器（10），环路滤波器（11），电压加法器（12），扫描控制器（13分钟），压控振荡器 （VCO）（14），90°移相器（15）和纠错/同步判定电路（16）。 连接在扫描控制器（13分钟）和D / A转换器（10）之间的是高通滤波器（HPF）（101），检测器（102）和比较器（103）。 纠错/同步判定电路（16）确定是否已建立同步，于是扫描控制器（13分钟）停止产生扫描信号并将其输出保持在预定的水平。 在错误同步的情况下，在D / A转换器（10）的输出（误差电压）上叠加拍子分量。 检测器（102）检测输入拍子分量信号。 接收检测器（102）的输出，比较器（103）将检测器（102）的输出与预定参考电压进行比较。 当检测器（102）的输出高于参考电压时，比较器（103）将先前提到的控制信号馈送到扫描控制器（13分钟）。 结果，扫描控制器（13分钟）恢复扫描信号的产生，即取消了错误同步。

公开(公告)号：EP1889372B1

公开(公告)日：2015-04-15

申请号：EP06760450.4

申请日：2006-05-24

申请人： QUALCOMM INCORPORATED

发明人： WALTON, Jay Rodney ,  WALLACE, Mark S., c/o Qualcomm Incorporated

IPC分类号： H04B1/00 ,  H04B1/7073 ,  H04B1/7075 ,  H04L25/02 ,  H04L27/00 ,  H04L1/00

CPC分类号： H04L1/0072 ,  H04B1/7073 ,  H04B1/7075 ,  H04L1/0045 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/0228 ,  H04L27/0006 ,  H04L27/0014 ,  H04L2027/0038 ,  H04L2027/0065 ,  H04L2027/0097

摘要： Techniques for detecting and demodulating a signal/transmission are described. Signal detection is performed in multiple stages using different types of signal processing, e.g., using time-domain correlation for a first stage, frequency-domain processing for a second stage, and time-domain processing for a third stage. For the first stage, products of symbols are generated for at least two different delays, correlation between the products for each delay and known values is performed, and correlation results for all delays are combined and used to declare the presence of a signal. For demodulation, the timing of input samples is adjusted to obtain timing-adjusted samples. A frequency offset is estimated and removed from the timing-adjusted samples to obtain frequency-corrected samples, which are processed with a channel estimate to obtain detected symbols. The phases of the detected symbols are corrected to obtain phase-corrected symbols, which are demodulated, deinterleaved, and decoded.