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1. 发明授权

US07366517B2 Cellular radio network reusing frequencies 有权
标题翻译：蜂窝无线网络重用频率
公开(公告)号：US07366517B2
公开(公告)日：2008-04-29
申请号：US11492916
申请日：2006-07-26
申请人： Ralf Keller , Ralf Tonjes , Wolfgang Stahl , Jörn Thielecke , Jörg Huschke , Udo Wachsmann
发明人： Ralf Keller , Ralf Tonjes , Wolfgang Stahl , Jörn Thielecke , Jörg Huschke , Udo Wachsmann
IPC分类号： H04Q7/20
CPC分类号： H04W16/14 , H04W16/02 , H04W16/32
摘要： Method of arranging a cellular radio network in a geographical area which is already covered by an existing cellular radio network, wherein cell clusters of the cellular radio network to be introduced and using a specific transmission frequency are located in areas determined by connecting at least two cells of the existing cellular radio network using the specific transmission frequency, and wherein the cell clusters are arranged such that they do not overlap with the cells of the existing cellular radio network. The cell clusters of the introduced cellular radio network may be adjusted by reducing the cell size of cell clusters of the introduced cellular radio network, and by introducing new cells into cell clusters of the introduced cellular radio network. The invention allows to reuse frequencies of an existing cellular radio network by an introduced cellular radio network in the same geographical area.
摘要翻译：在已经被现有的蜂窝无线电网络覆盖的地理区域中布置蜂窝无线电网络的方法，其中要引入并使用特定传输频率的蜂窝无线电网络的小区集群位于通过连接至少两个小区使用特定传输频率的现有蜂窝无线电网络，并且其中小区群集被布置为使得它们不与现有蜂窝无线电网络的小区重叠。引入的蜂窝无线电网络的小区群可以通过减小引入的蜂窝无线电网络的小区簇的小区大小，并且通过将新小区引入到所引入的蜂窝无线电网络的小区簇中来进行调整。本发明允许在相同地理区域中由引入的蜂窝无线电网络重用现有蜂窝无线电网络的频率。

2. 发明授权

US07120199B2 Link adaptation for MIMO transmission schemes 有权
公开(公告)号：US07120199B2
公开(公告)日：2006-10-10
申请号：US10137701
申请日：2002-05-03
申请人： Jörn Thielecke , Udo Wachsmann
发明人： Jörn Thielecke , Udo Wachsmann
IPC分类号： H04B7/02
CPC分类号： H04W52/42 , H04B7/0417 , H04B7/0443 , H04B7/0613 , H04B7/0632 , H04B7/0837 , H04L1/0003 , H04L1/0009 , H04L1/0656 , H04L1/12 , H04L5/0046 , H04L25/0208 , H04L25/0248 , H04W24/00 , H04W28/06 , H04W28/18
摘要： MIMO transmission methods are applied to communicaiton systems in which a transmitter has more than one transmit antenna and a receiver has more than one receive antenna. Information to be transmitted is divided into a plurality of subsignals according to the number of used transmit antennas and each subsignal is processed separately before it is emitted by the respective transmit antenna. In the receiver the different receive signals are processed thus that subsignals are detected and decoded and the contribution of each detected and decoded subsignal is subtracted from the receive signals and whereby a feedback channel from receiver to transmitter is used to send control information to the transmitter depending on the receive situation. In order to optimize the usage of the MIMO channel the invention proposes the in the receiver the link quality of each subsignal is determined and information of each subsignal is transmitted to the receiver via the feedback channel and that in the transmitter properties of the subsignals are controlled by the link quality information.

3. 发明授权

US07146132B2 Cellular radio network reusing frequencies 有权
标题翻译：蜂窝无线网络重用频率
公开(公告)号：US07146132B2
公开(公告)日：2006-12-05
申请号：US10415983
申请日：2001-06-26
申请人： Ralf Keller , Ralf Tonjes , Wolfgang Stahl , Jörn Thielecke , Jörg Huschke , Udo Wachsmann
发明人： Ralf Keller , Ralf Tonjes , Wolfgang Stahl , Jörn Thielecke , Jörg Huschke , Udo Wachsmann
IPC分类号： H04B1/00 , H04B15/00
CPC分类号： H04W16/14 , H04W16/02 , H04W16/32
摘要： Method of arranging a cellular radio network in a geographical area which is already covered by an existing cellular radio network, wherein cell clusters of the cellular radio network to be introduced and using a specific transmission frequency are located in areas determined by connecting at least two cells of the existing cellular radio network using the specific transmission frequency, and wherein the cell clusters are arranged such that they do not overlap with the cells of the existing cellular radio network. The cell clusters of the introduced cellular radio network may be adjusted by reducing the cell size of cell clusters of the introduced cellular radio network, and by introducing new cells into cell clusters of the introduced cellular radio network. The invention allows to reuse frequencies of an existing cellular radio network by an introduced cellular radio network in the same geographical area.
摘要翻译：在已经被现有的蜂窝无线电网络覆盖的地理区域中布置蜂窝无线电网络的方法，其中要引入并使用特定传输频率的蜂窝无线电网络的小区集群位于通过连接至少两个小区使用特定传输频率的现有蜂窝无线电网络，并且其中小区群集被布置为使得它们不与现有蜂窝无线电网络的小区重叠。引入的蜂窝无线电网络的小区群可以通过减小引入的蜂窝无线电网络的小区簇的小区大小，并且通过将新小区引入到所引入的蜂窝无线电网络的小区簇中来进行调整。本发明允许在相同地理区域中由引入的蜂窝无线电网络重用现有蜂窝无线电网络的频率。

4. 发明授权

US06807154B1 Link and radio cell adaptation in TDD systems 有权
标题翻译： TDD系统中的链路和无线电小区适配
公开(公告)号：US06807154B1
公开(公告)日：2004-10-19
申请号：US09415705
申请日：1999-10-11
申请人： Göran Malmgren , Jamshid Khun-Jush , Hui Li , Uwe Dettmar , Peter Schramm , Jörn Thielecke , Udo Wachsmann
发明人： Göran Malmgren , Jamshid Khun-Jush , Hui Li , Uwe Dettmar , Peter Schramm , Jörn Thielecke , Udo Wachsmann
IPC分类号： H04B7212
CPC分类号： H04L1/0001 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04W8/245 , H04W48/12
摘要： A TDMA/TDD link adaptation method determines radio link quality at a base station. The radio link quality is used to update and broadcast a physical layer parameter indicator (10-16) from the base station on a broadcast control channel having a common physical layer parameter indicator for all uplink and downlink channels.
摘要翻译： TDMA / TDD链路自适应方法确定基站处的无线电链路质量。无线电链路质量用于在具有用于所有上行链路和下行链路信道的公共物理层参数指示符的广播控制信道上从基站更新和广播物理层参数指示符（10-16）。

5. 发明授权

US08787493B2 Precoding technique 有权
标题翻译：预编码技术
公开(公告)号：US08787493B2
公开(公告)日：2014-07-22
申请号：US13817604
申请日：2011-08-12
申请人： Eckhard Ohlmer , Udo Wachsmann
发明人： Eckhard Ohlmer , Udo Wachsmann
IPC分类号： H04L25/49
CPC分类号： H04L1/0042 , H04B7/0417 , H04B7/0465 , H04B7/063 , H04B7/0634
摘要： A technique for precoding a signal to be transmitted over a physical channel from a sender to a receiver is provided. A method includes receiving precoding information and applying precoding matrix at the sender based on the precoding information. The precoding information is received via a feedback mechanism from the receiver. The application of the precoding matrix results in a precoded signal for transmission over the physical channel. The precoding matrix enhances mutual information at the receiver.
摘要翻译：提供了一种用于对通过物理信道从发送方发送到接收方的信号进行预编码的技术。一种方法包括基于预编码信息接收预编码信息并在发送方应用预编码矩阵。经由来自接收机的反馈机制接收预编码信息。预编码矩阵的应用导致用于在物理信道上传输的预编码信号。预编码矩阵增强了接收机的互信息。

6. 发明申请

US20130188751A1 Precoding Technique 有权
标题翻译：预编码技术
公开(公告)号：US20130188751A1
公开(公告)日：2013-07-25
申请号：US13817604
申请日：2011-08-12
申请人： Eckhard Ohlmer , Udo Wachsmann
发明人： Eckhard Ohlmer , Udo Wachsmann
IPC分类号： H04L1/00
CPC分类号： H04L1/0042 , H04B7/0417 , H04B7/0465 , H04B7/063 , H04B7/0634
摘要： A technique for precoding a signal to be transmitted over a physical channel (102; 206) from a sender to a receiver is provided. As to a method aspect, a method (100) comprises the steps of receiving (104) precoding information and applying (108) a precoding matrix (W) at the sender based on the precoding information. The precoding information is received via a feedback mechanism from the receiver. The application results in a precoded signal (216, 218) for transmission over the physical channel (102; 206). The precoding matrix (W) enhances mutual information (I) at the receiver.
摘要翻译：提供了一种用于对通过物理信道（102; 206）从发送方发送到接收方的信号进行预编码的技术。对于方法方面，方法（100）包括以下步骤：基于预编码信息接收（104）预编码信息并在发送器处应用（108）预编码矩阵（W）。经由来自接收机的反馈机制接收预编码信息。应用程序产生用于通过物理信道（102; 206）传输的预编码信号（216,218）。预编码矩阵（W）增强了接收机处的互信息（I）。

7. 发明申请

US20100309810A1 Technique For Soft Bit Scaling 有权
标题翻译：软比例缩放技术
公开(公告)号：US20100309810A1
公开(公告)日：2010-12-09
申请号：US12867249
申请日：2009-02-09
申请人： Udo Wachsmann
发明人： Udo Wachsmann
IPC分类号： H04J3/14 , H04L1/18 , G06F11/14
CPC分类号： H04L25/067 , H04L1/0045 , H04L1/0066 , H04L1/1812
摘要： A technique for determining in a fading channel environment a scaling factor for soft bit quantization is proposed. In a method realisation, the technique includes repeatedly determining an SNR value for the fading channel, calculating a weighted average based on a plurality of the SNR values, wherein weighting is performed such that contributions of extremal SNR values are attenuated, and determining the scaling factor for soft bit quantization dependent on the weighted average.
摘要翻译：提出了一种用于在衰落信道环境中确定用于软比特量化的缩放因子的技术。在方法实现中，该技术包括重复地确定衰落信道的SNR值，基于多个SNR值来计算加权平均值，其中执行加权，使得极值SNR值的贡献被衰减，并且确定缩放因子用于取决于加权平均值的软位量化。

8. 发明授权

US07826342B2 Correlation method for channel estimation for OFDM 有权
标题翻译： OFDM信道估计的相关方法
公开(公告)号：US07826342B2
公开(公告)日：2010-11-02
申请号：US10541790
申请日：2003-01-15
申请人： Stefan Mueller-Weinfurtner , Peter Schramm , Udo Wachsmann
发明人： Stefan Mueller-Weinfurtner , Peter Schramm , Udo Wachsmann
IPC分类号： H04J11/00
CPC分类号： H04L27/2647 , H04L1/0003 , H04L1/0009 , H04L25/0204 , H04L25/022
摘要： The present invention concerns a method for estimating the time-dispersion of a channel comprising D subchannels, wherein one computes from a received signal a set of estimated Channel Transfer Factors (CTF's) Ĥ[ν], where ν(0≦ν≦D) is the subchannel number, said method comprising a step of calculating, for a predetermined strictly positive integer d, a correlation factor Cd representing the correlations, both in amplitude and in phase, between pairs Ĥ[ν] and Ĥ[ν+d] of said computed CTF estimates. By an appropriate choice of d, the time-dispersion resolution can be adapted to most prevalent channels. The correlation is optionally corrected according to the mean channel estimation signal-to-noise ratio. This method can be used for many applications where knowing the time-dispersion characteristics of a channel is required, and is, for example, particularly suitable for designing a channel estimation filter, and for link adaptation. Application to devices and apparatus implementing these methods.
摘要翻译：本发明涉及一种用于估计包括D个子信道的信道的时间分散的方法，其中一个从接收信号计算一组估计的信道传送因子（CTF's）Ĥ[＆ngr]，其中＆ngr;（0＆nlE;＆ngr; ＆lt; nlE; D）是子信道号，所述方法包括以下步骤：对于预定的严格正整数d，表示对之间的相关性的相关因子Cd（在幅度和相位上），Λ[＆ngr]和Ĥ[ ＆ngr; + d]。通过d的适当选择，时间 - 分散度分辨率可以适应于最流行的频道。可以根据平均信道估计信噪比来校正相关性。该方法可以用于需要知道信道的时间 - 色散特性的许多应用，并且例如特别适用于设计信道估计滤波器和用于链路自适应。应用于实现这些方法的设备和设备。

9. 发明授权

US07106709B2 Timing drift compensation in wireless packet-based systems 有权
标题翻译：无线分组系统中的定时漂移补偿
公开(公告)号：US07106709B2
公开(公告)日：2006-09-12
申请号：US09994944
申请日：2001-11-28
申请人： Stefan Davidsson , Mathias Pauli , Peter Schramm , Fabian Wenger , Udo Wachsmann , Roger Walther
发明人： Stefan Davidsson , Mathias Pauli , Peter Schramm , Fabian Wenger , Udo Wachsmann , Roger Walther
IPC分类号： H04Q7/00 , H04J3/06
CPC分类号： H04L27/2657 , H04L7/027 , H04L7/04 , H04L27/2602 , H04L27/2662 , H04L27/2675 , H04L27/2679 , H04L27/2695 , H04L2027/0028 , H04L2027/0095
摘要： A radio receiver system (30) comprises a radio receiver (41), a receiver sample clock (60), which is used for sampling a modulated base-band signal; and a timing correction unit (100). The timing correction unit (100) performs, in the frequency domain, a timing drift compensation between a transmitter sample clock (66) and the receiver sample clock (60). In one example context of implementation, the plural modulated radio frequency carriers have been modulated using Orthogonal Frequency Division Multiplexing (OFDM).
摘要翻译：无线电接收机系统（30）包括无线电接收机（41），接收机采样时钟（60），用于对已调制的基带信号进行采样; 和定时校正单元（100）。定时校正单元（100）在频域中执行发射机采样时钟（66）和接收机采样时钟（60）之间的定时漂移补偿。在一个实施例的上下文中，已经使用正交频分复用（OFDM）调制了多个调制的射频载波。

10. 发明授权

US08553546B2 Technique for soft bit scaling 有权
标题翻译：软比特缩放技术
公开(公告)号：US08553546B2
公开(公告)日：2013-10-08
申请号：US12867249
申请日：2009-02-09
申请人： Udo Wachsmann
发明人： Udo Wachsmann
IPC分类号： H04J1/16
CPC分类号： H04L25/067 , H04L1/0045 , H04L1/0066 , H04L1/1812
摘要： A technique for determining in a fading channel environment a scaling factor for soft bit quantization is proposed. In a method realisation, the technique includes repeatedly determining an SNR value for the fading channel, calculating a weighted average based on a plurality of the SNR values, wherein weighting is performed such that contributions of extremal SNR values are attenuated, and determining the scaling factor for soft bit quantization dependent on the weighted average.
摘要翻译：提出了一种用于在衰落信道环境中确定用于软比特量化的缩放因子的技术。在方法实现中，该技术包括重复地确定衰落信道的SNR值，基于多个SNR值来计算加权平均值，其中执行加权，使得极值SNR值的贡献被衰减，并且确定缩放因子用于取决于加权平均值的软位量化。

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