公开(公告)号：US20080268887A1

公开(公告)日：2008-10-30

申请号：US12072638

申请日：2008-02-26

申请人： Kaj Jansen ,  Markku J. Heikkila ,  Ulo Parts ,  Juha Heiskala ,  Zoltan Safar

发明人： Kaj Jansen ,  Markku J. Heikkila ,  Ulo Parts ,  Juha Heiskala ,  Zoltan Safar

IPC分类号： H04B7/26 ,  H04B7/005

CPC分类号： H04B7/022

摘要： A semi-single frequency network (SFN) concept is presented. According to the SFN concept, the same data signal is transmitted from multiple base stations to a mobile terminal simultaneously on the same frequency band. Accordingly, the transmitted signals are combined in the radio channel and the mobile terminal experiences the transmitted signals as one signal propagated through a multipath channel. Additionally, each base station transmits a base station specific pilot signal. The mobile terminal carries out a channel estimation procedure for each received pilot signal and combines the channel estimates to obtain information how to equalize the received data signal. Then, the mobile terminal calculates equalization weights from the combined channel estimates and equalizes the received data signal.

摘要翻译： 提出了一种半单频网络（SFN）概念。 根据SFN概念，相同的数据信号在同一频带上同时从多个基站发送到移动终端。 因此，所发送的信号在无线电信道中组合，并且移动终端经历作为通过多径信道传播的一个信号的发送信号。 另外，每个基站发送基站专用导频信号。 移动终端对每个接收到的导频信号执行信道估计过程，并组合信道估计以获得如何均衡接收的数据信号的信息。 然后，移动终端从组合信道估计中计算均衡权重，并对接收到的数据信号进行均衡。

公开(公告)号：US08908611B2

公开(公告)日：2014-12-09

申请号：US12072638

申请日：2008-02-26

申请人： Kaj Jansen ,  Markku J. Heikkilä ,  Ulo Parts ,  Juha Heiskala ,  Zoltan Safar

发明人： Kaj Jansen ,  Markku J. Heikkilä ,  Ulo Parts ,  Juha Heiskala ,  Zoltan Safar

IPC分类号： H04B7/26 ,  H04B7/02

CPC分类号： H04B7/022

摘要： A semi-single frequency network (SFN) concept is presented. According to the SFN concept, the same data signal is transmitted from multiple base stations to a mobile terminal simultaneously on the same frequency band. Accordingly, the transmitted signals are combined in the radio channel and the mobile terminal experiences the transmitted signals as one signal propagated through a multipath channel. Additionally, each base station transmits a base station specific pilot signal. The mobile terminal carries out a channel estimation procedure for each received pilot signal and combines the channel estimates to obtain information how to equalize the received data signal. Then, the mobile terminal calculates equalization weights from the combined channel estimates and equalizes the received data signal.

摘要翻译： 提出了一种半单频网络（SFN）概念。 根据SFN概念，相同的数据信号在同一频带上同时从多个基站发送到移动终端。 因此，所发送的信号在无线电信道中组合，并且移动终端经历作为通过多径信道传播的一个信号的发送信号。 另外，每个基站发送基站专用导频信号。 移动终端对每个接收到的导频信号执行信道估计过程，并组合信道估计以获得如何均衡接收的数据信号的信息。 然后，移动终端从组合信道估计中计算均衡权重，并对接收到的数据信号进行均衡。

公开(公告)号：US20090046571A1

公开(公告)日：2009-02-19

申请号：US11893249

申请日：2007-08-15

申请人： Zoltan Safar

发明人： Zoltan Safar

IPC分类号： H04J11/00 ,  H04L27/28

CPC分类号： H04L27/2662 ,  H04L27/2626 ,  H04L27/2646 ,  H04L27/2655 ,  H04W56/0005

摘要： A timing adjustment value is received, and from the received timing adjustment value is determined an integer portion and a fractional portion. In the frequency domain, the determined fractional portion is applied by rotating a signal. Optionally, a phase shift may also be imposed with the rotation. In the time domain, the determined integer portion is applied by one of inserting samples in the rotated signal or removing samples from the rotated signal in an amount corresponding to the determined integer portion. After the signal rotation to apply the fractional portion, the active sub-carriers are mapped, and the transition from frequency domain to time domain occurs by means of an inverse Fourier transform. A cyclic prefix CP may be added after the Fourier transform, separately or functionally combined with the integer portion shift by modifying the size of the CP to impose the determined integer portion. After other conventional processing known in the art, the rotated signal as advanced/delayed by the sample removal/addition is then transmitted.

摘要翻译： 接收定时调整值，并且从接收的定时调整值确定整数部分和小数部分。 在频域中，通过旋转信号来施加确定的分数部分。 可选地，也可以通过旋转施加相移。 在时域中，所确定的整数部分通过在旋转信号中插入采样之一或从对应于所确定的整数部分的量的旋转信号中移除样本之一来施加。 在信号旋转以应用小数部分之后，映射有源子载波，并且通过傅里叶逆变换发生从频域到时域的转变。 循环前缀CP可以在傅立叶变换之后，通过修改CP的大小来强制确定的整数部分，分开地或与整数部分移位相结合。 在本领域已知的其它常规处理之后，随后传送通过样品去除/添加进行推迟/延迟的旋转信号。

公开(公告)号：US07720168B2

公开(公告)日：2010-05-18

申请号：US11137589

申请日：2005-05-26

申请人： Weifeng Su ,  K. J. Ray Liu ,  Zoltan Safar

发明人： Weifeng Su ,  K. J. Ray Liu ,  Zoltan Safar

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04L1/0606 ,  H04B7/0667 ,  H04B7/068 ,  H04L1/0637

摘要： Maximum diversity in multiple antenna distributed frequency broadband systems such as MIMO-OFDM is achievable through space-frequency (SF) and space-time-frequency (STF) coding. Full-rate full-diversity coding is achieved through a combination of maximal minimum product distance symbol set design and formation of codeword blocks. Full-diversity codes are also achieved which have reduced symbol transmission rates, such as through mapping of space-time (ST) codes to SF codes. The reduction in symbol rate may be offset by the fact that any ST code may be mapped to a full-diversity SF code.

摘要翻译： 通过空间频率（SF）和空时频率（STF）编码可以实现多天线分布式频率宽带系统（如MIMO-OFDM）的最大分集。 通过最大最小乘积距离符号集设计和码字块的形成的组合来实现全速率全分集编码。 还实现了具有降低的符号传输速率的全分集码，例如通过将时空（ST）码映射到SF码。 符号率的降低可能被任何ST代码映射到全分集SF代码的事实所抵消。

公开(公告)号：US20060034383A1

公开(公告)日：2006-02-16

申请号：US11137589

申请日：2005-05-26

申请人： Weifeng Su ,  K.J. Liu ,  Zoltan Safar

发明人： Weifeng Su ,  K.J. Liu ,  Zoltan Safar

IPC分类号： H04B7/02 ,  H04K1/10

CPC分类号： H04L1/0606 ,  H04B7/0667 ,  H04B7/068 ,  H04L1/0637

摘要： Maximum diversity in multiple antenna distributed frequency broadband systems such as MIMO-OFDM is achievable through space-frequency (SF) and space-time-frequency (STF) coding. Full-rate full-diversity coding is achieved through a combination of maximal minimum product distance symbol set design and formation of codeword blocks. Full-diversity codes are also achieved which have reduced symbol transmission rates, such as through mapping of space-time (ST) codes to SF codes. The reduction in symbol rate may be offset by the fact that any ST code may be mapped to a full-diversity SF code.

摘要翻译： 通过空间频率（SF）和空时频率（STF）编码可以实现多天线分布式频率宽带系统（如MIMO-OFDM）的最大分集。 通过最大最小乘积距离符号集设计和码字块的形成的组合来实现全速率全分集编码。 还实现了具有降低的符号传输速率的全分集码，例如通过将时空（ST）码映射到SF码。 符号率的降低可能被任何ST代码映射到全分集SF代码的事实所抵消。

公开(公告)号：US08031586B2

公开(公告)日：2011-10-04

申请号：US11893249

申请日：2007-08-15

申请人： Zoltan Safar

发明人： Zoltan Safar

IPC分类号： H04J11/00

CPC分类号： H04L27/2662 ,  H04L27/2626 ,  H04L27/2646 ,  H04L27/2655 ,  H04W56/0005

摘要： A timing adjustment value is received, and from the received timing adjustment value is determined an integer portion and a fractional portion. In the frequency domain, the determined fractional portion is applied by rotating a signal. Optionally, a phase shift may also be imposed with the rotation. In the time domain, the determined integer portion is applied by one of inserting samples in the rotated signal or removing samples from the rotated signal in an amount corresponding to the determined integer portion. After the signal rotation to apply the fractional portion, the active sub-carriers are mapped, and the transition from frequency domain to time domain occurs by means of an inverse Fourier transform. A cyclic prefix CP may be added after the Fourier transform, separately or functionally combined with the integer portion shift by modifying the size of the CP to impose the determined integer portion. After other conventional processing known in the art, the rotated signal as advanced/delayed by the sample removal/addition is then transmitted.

摘要翻译： 接收定时调整值，并且从接收的定时调整值确定整数部分和小数部分。 在频域中，通过旋转信号来施加确定的分数部分。 可选地，也可以通过旋转施加相移。 在时域中，所确定的整数部分通过在旋转信号中插入采样之一或从对应于所确定的整数部分的量的旋转信号中移除样本之一来施加。 在信号旋转以应用小数部分之后，映射有源子载波，并且通过傅里叶逆变换发生从频域到时域的转变。 循环前缀CP可以在傅立叶变换之后，通过修改CP的大小来强制确定的整数部分，分开地或与整数部分移位相结合。 在本领域已知的其它常规处理之后，随后传送通过样品去除/添加进行推迟/延迟的旋转信号。