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91. 发明申请

US20060227908A1 Advanced signal processors for interference cancellation in baseband receivers 有权
标题翻译：用于基带接收机干扰消除的高级信号处理器
公开(公告)号：US20060227908A1
公开(公告)日：2006-10-12
申请号：US11204606
申请日：2005-08-15
申请人： Louis Scharf , Vijay Nagarajan
发明人： Louis Scharf , Vijay Nagarajan
IPC分类号： H04B1/10
CPC分类号： H04B1/126 , H04B1/1027 , H04B1/1081 , H04B1/7105 , H04B1/7107 , H04B1/7117 , H04B1/712 , H04B7/0678 , H04B7/0891 , H04B2001/1045 , H04B2201/70719 , H04B2201/70979 , H04J13/0022 , H04J13/20
摘要： A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected subchannel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.
摘要翻译：多模式接收机包括用于将接收到的信号分离为多路径分量的信道分解模块（例如，Rake接收机），用于选择干扰路径和子信道的干扰选择器，用于合成来自所选子信道符号估计的干扰信号的合成器，以及干扰消除器，用于消除所接收信号中的选定干扰。信道分解模块，合成器和干扰消除器中的至少一个可配置用于处理多模信号。

92. 发明授权

US07113476B2 Interference cancellation method and receiver 失效
标题翻译：干扰消除方法和接收机
公开(公告)号：US07113476B2
公开(公告)日：2006-09-26
申请号：US09971770
申请日：2001-10-09
申请人： Antonia Maria Tulino
发明人： Antonia Maria Tulino
IPC分类号： H04J11/00 , H03K5/01
CPC分类号： H04B1/7101 , H04B1/1036 , H04B1/7107
摘要： The invention relates to an interference cancellation method and a receiver including interference canceller for suppressing a narrow-band interference signal from a received signal, converter for performing an orthonormal conversion of the signal into subspace components of a desired subspace, a decoder connected operationally to the output of the interference canceller, in which decoder an estimate for the received signal is obtained. The output of the decoder is operationally connected to the interference canceller, and the converter is arranged to determine an estimate for narrow-band interference properties, in which determination the estimate obtained from the output of the decoder is subtracted from the received signal before the orthonormal conversion is performed. By using the determined estimate, the interference canceller is arranged to reduce effect of the subspace components including narrow-band interference signals from the received signal.
摘要翻译：本发明涉及一种干扰消除方法和一种接收机，包括用于抑制来自接收信号的窄带干扰信号的干扰消除器，用于执行将信号正交转换为期望子空间的子空间分量的转换器，解码器可操作地连接到干扰消除器的输出，其中解码器获得对接收信号的估计。解码器的输出可操作地连接到干扰消除器，并且转换器被布置为确定窄带干扰特性的估计，其中确定从解码器的输出获得的估计在正交正交之前从接收信号中减去进行转换。通过使用所确定的估计，干扰消除器被布置为减少包括来自接收信号的窄带干扰信号的子空间分量的影响。

93. 发明授权

US07110439B2 System for decreasing processing time in an iterative multi-user detector system 有权
标题翻译：用于在迭代多用户检测器系统中减少处理时间的系统
公开(公告)号：US07110439B2
公开(公告)日：2006-09-19
申请号：US10105918
申请日：2002-03-25
申请人： Robert B. MacLeod
发明人： Robert B. MacLeod
IPC分类号： H04B1/707
CPC分类号： H04L25/03331 , H04B1/7107 , H04L1/0048 , H04L25/03171 , H04L25/03286 , H04L2025/03611
摘要： A system is provided for use with a multi-user detector MUD, which dramatically decreases the processing time for separating out interfering transmissions from a number of users by eliminating from each processing iteration consideration of those bit estimates for which the probability or estimate of their value exceeds a predetermined threshold and can therefore be declared “certain”. In a Turbo MUD environment in which the output of the MUD is coupled back to the MUD through an error correction system, the output of the error correction is thresholded such that those bit estimates having probabilities or estimates greater than a predetermined threshold are assigned a quantized value and are eliminated from further processing by the MUD. For certain low-complexity processing Turbo MUDs there can be as much of a reduction as one-third in processing time, whereas for full MUD processing, the reduction in processing time can be as much as 1/30th.
摘要翻译：提供了一种与多用户检测器MUD一起使用的系统，其大大减少了用于从多个用户分离干扰传输的处理时间，通过从每个处理迭代考虑那些其值的概率或估计值的位估计超过预定阈值，因此可以被声明为“一定”。在其中MUD的输出通过纠错系统耦合回MUD的Turbo MUD环境中，纠错的输出被阈值化，使得具有大于预定阈值的概率或估计的那些比特估计被分配给量化的价值，并被MUD的进一步处理所消除。对于某些低复杂度处理Turbo MUD，可以减少处理时间的三分之一，而对于完全的MUD处理，处理时间的缩短可以高达1/30。

94. 发明授权

US07106781B2 Highly bandwidth-efficient communications 有权
公开(公告)号：US07106781B2
公开(公告)日：2006-09-12
申请号：US09920903
申请日：2001-08-03
申请人： Brian G. Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Timothy Golden , Minnie Ho , Elliott Hoole , Mary Jesse , Robert Lee Maxwell , Robert G. Mechaley, Jr. , Robert Ray Naish , David J. Nix , David James Ryan , David Stephenson
发明人： Brian G. Agee , Matthew Bromberg , Derek Gerlach , David Gibbons , James Timothy Golden , Minnie Ho , Elliott Hoole , Mary Jesse , Robert Lee Maxwell , Robert G. Mechaley, Jr. , Robert Ray Naish , David J. Nix , David James Ryan , David Stephenson
IPC分类号： H04B1/69 , H04B7/216
CPC分类号： H04B1/69 , H04B1/692 , H04B1/707 , H04B1/7107 , H04B7/04 , H04B2201/70702 , H04L5/0021 , H04L5/0026 , H04L5/0048 , H04L5/026 , H04L25/0228 , H04L25/03019 , H04L27/186 , H04L27/3416 , H04L2025/03414 , H04L2025/03426 , H04W16/14 , H04W88/08
摘要： A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms. In a specific embodiment the spectral and spatial components of the adaptive weights are calculated in a unified operation based on the mathematical analogy between the spectral and spatial descriptions of the airlink.

95. 发明授权

US07092430B2 Method for using a non-orthogonal pilot signal with data channel interference cancellation 有权
公开(公告)号：US07092430B2
公开(公告)日：2006-08-15
申请号：US11178767
申请日：2005-07-11
申请人： Antoine J. Rouphael , John E. Hoffmann , George Rodney Nelson, Jr. , James A. Proctor, Jr.
发明人： Antoine J. Rouphael , John E. Hoffmann , George Rodney Nelson, Jr. , James A. Proctor, Jr.
IPC分类号： H04B1/707
CPC分类号： H04B1/7107 , H04B2201/70701
摘要： A system and method for encoding/decoding data channels in a CDMA system having data channel interference cancellation, wherein data channel interference cancellation is used to remove unwanted non-orthogonal pilot signal components which are present within a demodulated data signal. This is accomplished by regenerating interference terms with respect to the non-orthogonal pilot signal and subtracting them from the demodulated data signal.

96. 发明授权

US07079607B2 Multi-user detection method 失效
标题翻译：多用户检测方法
公开(公告)号：US07079607B2
公开(公告)日：2006-07-18
申请号：US09918477
申请日：2001-08-01
申请人： Loic Brunel
发明人： Loic Brunel
IPC分类号： H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10
CPC分类号： H04B7/086 , H04B1/7103 , H04B1/7107 , H04B1/7117
摘要： A multi-user detection method eliminating interference between users transmitting modulated data of symbols on a transmission channel, each transmission channel including at least one propagation path arriving at an array of reception antennas in a direction of arrival. Each user (a) estimates the signal transmitted by the user from the antenna signals, effecting estimation of the direction of arrival and characteristics of propagation of each path of the transmission channel from the signals; (b) estimates the data transmitted by the user from the estimation of the signal transmitted; (c) estimates the contribution of the user to the signals received by the different antennas from the estimated data and the estimated direction of arrival and propagation characteristics; and (d) subtracts from the antenna signals the contribution estimated at (c) to obtain cleaned antenna signals, supplied by at least a first sequence, used as antenna signals by at least a second sequence.
摘要翻译：一种多用户检测方法，消除了在传输信道上发送符号调制数据的用户之间的干扰，每个传输信道包括到达一个到达方向的接收天线阵列的至少一个传播路径。每个用户（a）估计用户从天线信号发射的信号，从信号中实现传输信道的每个路径的到达方向和传播特性的估计; （b）从所传送的信号的估计估计用户发送的数据; （c）估计用户对由不同天线接收的信号与估计数据和估计的到达方向和传播特性的贡献; 以及（d）从天线信号中减去由（c）估计的贡献，以通过至少第二序列用作天线信号的由至少第一序列提供的净化的天线信号。

97. 发明授权

US07065055B1 Zero delay interference cancellation 失效
标题翻译：零延迟干扰消除
公开(公告)号：US07065055B1
公开(公告)日：2006-06-20
申请号：US09665200
申请日：2000-09-18
申请人： Jonas Karlsson , Riaz Esmailzadeh
发明人： Jonas Karlsson , Riaz Esmailzadeh
IPC分类号： H04B1/44
CPC分类号： H04B1/7103 , H04B1/7107 , H04B2201/70705 , H04B2201/70707
摘要： Method and apparatus for minimizing the processing delay incurred by an IC receiver over conventional receivers in a CDMA cellular system are disclosed. The method and apparatus involve operating the conventional receiver and the IC receiver in parallel to each other. Data from the conventional receiver are then used to supplement data from the IC receiver in order to minimize the delays incurred by the IC receiver.
摘要翻译：公开了一种用于最小化IC接收机在CDMA蜂窝系统中的常规接收机所引起的处理延迟的方法和装置。所述方法和装置包括相互并行地操作常规接收器和IC接收器。然后使用来自常规接收机的数据来补充来自IC接收机的数据，以便最小化由IC接收器引起的延迟。

98. 发明授权

US07016436B1 Selective joint demodulation systems and methods for receiving a signal in the presence of noise and interference 有权
公开(公告)号：US07016436B1
公开(公告)日：2006-03-21
申请号：US09464830
申请日：1999-12-17
申请人： Karl J. Molnar
发明人： Karl J. Molnar
IPC分类号： H04B1/69 , H03D1/04
CPC分类号： H04B1/7105 , H04B1/7107
摘要： A signal is received in the presence of noise and interference by demodulating the signal when a relationship between the signal and the noise and the interference meets a criterion, and by jointly demodulating the signal when the relationship between the signal and the noise and the interference does not meet the criterion. Moreover, the signal may be demodulated if a relationship between the noise and the interference meets a second criterion and may be jointly demodulated if the relationship between the noise and the interference does not meet the second criterion. More specifically, demodulation may be performed when the signal-to-noise-and-interference ratio exceeds a first threshold and joint demodulation may be performed when the signal-to-noise-and-interference ratio is less than the first threshold. Moreover, the signal may be jointly demodulated if the interference-to-noise ratio exceeds a second threshold, and the signal may be demodulated if the interference-to-noise ratio is less than the second threshold. Thus, if the desired signal power is high relative to noise and interference, joint demodulation may be skipped and demodulation may be performed. Moreover, if the desired signal power is not large compared to interference-and-noise, joint demodulation may be used only when the interference power is high relative to the noise power. Finally, an interfering signal's synchronization word may be found in the received signal, and the power of the interfering signal relative to the noise power may be determined from the located interfering signal synchronization word, to thereby determine the interference-to-noise ratio. Moreover, the interfering signal's synchronization word that is detected can provide improved estimation of the interfering signal's channel estimate, which can be estimated in terms of the interfering signal's medium response compared to the composite channel response.

99. 发明申请

US20050207477A1 Technique for adaptive multiuser equalization in code division multiple access systems 失效
标题翻译：用于码分多址系统中自适应多用户均衡的技术
公开(公告)号：US20050207477A1
公开(公告)日：2005-09-22
申请号：US11082621
申请日：2005-03-16
申请人： Peter Monsen
发明人： Peter Monsen
IPC分类号： H04B1/707 , H04B7/08
CPC分类号： H04B1/7105 , H04B1/7107 , H04B7/08 , H04B2201/70702
摘要： A radio communication method and system for transmitting multiple-user digital data information in a Code Division Multiple Access (CDMA) format over multipath and mutual-interfering channels to a receiving terminal with diversity antennas and equalization signal processing. At the receiving terminal, diversity antenna signals are grouped into time blocks and replicas are generated of the user-unique CDMA sequence signals for a set of K mutually interfering users. Within each time block the multiuser channel is estimated, equalization parameters are calculated, and decision-feedback equalization is used to produce multiuser estimates associated with a subset λ of the K users. These estimates are deinterleaved and error-correction decoded to recover transmitted digital data information for the subset of λ users. The invention includes embodiments for a CDMA sequence period that is equal to or longer than the transmitted data symbol interval with applications to current CDMA reverse link and forward link standards. Also embodiments for both decision-directed and reference-directed channel estimation are given.
摘要翻译：一种无线电通信方法和系统，用于通过多路径和互相干扰信道将码分多址（CDMA）格式的多用户数字数据信息发射到具有分集天线和均衡信号处理的接收终端。在接收终端，分集天线信号被分组成时间块，并且为一组K个相互干扰的用户生成用户唯一的CDMA序列信号的副本。在每个时间块内，估计多用户信道，计算均衡参数，并且使用判决反馈均衡来产生与K个用户的子集λ相关联的多用户估计。这些估计被解交织并进行纠错解码，以恢复λ用户子集的发送数字数据信息。本发明包括对应于当前CDMA反向链路和前向链路标准的CDMA序列周期等于或长于所发射的数据符号间隔的实施例。给出了决策导向和参考导向信道估计的实施例。

100. 发明申请

US20050141460A9 Cancellation of interference in a communication system with application to S-CDMA 有权
标题翻译：消除应用于S-CDMA的通信系统中的干扰
公开(公告)号：US20050141460A9
公开(公告)日：2005-06-30
申请号：US10142189
申请日：2002-05-08
申请人： Bruce Currivan , Thomas Kolze , Gottfried Ungerboeck , Nabil Yousef
发明人： Bruce Currivan , Thomas Kolze , Gottfried Ungerboeck , Nabil Yousef
IPC分类号： H04B1/707 , H04B7/216 , H04J13/00 , H04J13/16
CPC分类号： H04B7/216 , H04B1/71 , H04B1/7102 , H04B1/7105 , H04B1/7107 , H04J13/0003 , H04J13/16
摘要： Cancellation of interference in a communication system with application to S-CDMA. A relatively straight-forward implemented, and computationally efficient approach of selecting a predetermined number of unused codes is used to perform weighted linear combination selectively with each of the input spread signals in a multiple access communication system. If desired, the predetermined number of unused codes is always the same in each implementation. Alternatively, the predetermined number of unused codes are selected from within a reordered code matrix using knowledge that is shared between the two ends of a communication system, such as between the CMs and a CMTS. While the context of an S-CDMA communication system having CMs and a CMTS is used, the solution is generally applicable to any communication system that seeks to cancel narrowband interference. Several embodiments are also described that show the generic applicability of the solution across a wide variety of systems.
摘要翻译：消除应用于S-CDMA的通信系统中的干扰。使用选择预定数量的未使用代码的相对简单的实现和计算上有效的方法来在多址通信系统中选择性地与每个输入扩展信号执行加权线性组合。如果需要，在每个实现中，预定数量的未使用代码总是相同的。或者，使用在诸如CM和CMTS之间的通信系统的两端之间共享的知识，从重排序代码矩阵中选择预定数量的未使用代码。虽然使用具有CM和CMTS的S-CDMA通信系统的上下文，但该解决方案通常适用于试图取消窄带干扰的任何通信系统。还描述了几个实施例，其显示了解决方案在各种系统上的通用适用性。

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