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    • 93. 发明授权
    • Channel estimator
    • 通道估计器
    • US06603823B1
    • 2003-08-05
    • US09438475
    • 1999-11-12
    • Daniel YellinDoron RainishRony Ashkenazi
    • Daniel YellinDoron RainishRony Ashkenazi
    • H03D100
    • H04L1/20H04B2201/70701H04L25/0232
    • The present invention is a channel estimator based on the values of received data and on a priori probabilities only of received symbols. The channel estimator includes a symbol probability generator, a noise variance estimator and a channel tap estimator. The symbol probability generator generates a priori probabilities only of transmitted symbols found in the received signal(s). The noise variance estimator estimates at least one noise variance corrupting the received signal(s). The channel tap estimator generates channel estimates from the received signal(s), the a priori probabilities and the noise variance(s).
    • 本发明是基于接收数据的值和仅接收符号的先验概率的信道估计器。 信道估计器包括符号概率发生器,噪声方差估计器和信道抽头估计器。 符号概率发生器仅生成在接收信号中发现的发送符号的先验概率。 噪声方差估计器估计至少一个噪声方差破坏接收到的信号。 信道抽头估计器从接收到的信号,先验概率和噪声方差生成信道估计。
    • 94. 发明授权
    • Methods and systems for control-channel resource allocation in multi-user communication systems
    • 多用户通信系统中控制信道资源分配的方法和系统
    • US08831653B2
    • 2014-09-09
    • US13008917
    • 2011-01-19
    • Shahar FattalDaniel YellinRonen MayrenchShlomo Shamai
    • Shahar FattalDaniel YellinRonen MayrenchShlomo Shamai
    • H04B15/00H04W72/08
    • H04W72/082
    • A method in a communication system, in which multiple transmitters transmit respective control messages to a receiver over a control channel, includes allocating respective resources of the control channel to the control messages so as to cause a respective likelihood of interference between a control message and at least one other control message to be inversely related to a respective impact of the interference between the control message and the at least one other control message on an overall performance measure defined for the communication system, by allocating a dedicated resource to a first control message for which the interference has a high impact on the overall performance measure, and allocating a shared resource to a second control message for which the interference has a low impact on the overall performance measure. The control messages are transmitted from the transmitters over the control channel using the allocated resources.
    • 一种通信系统中的方法,其中多个发射机通过控制信道向接收机发送相应的控制消息,包括:将所述控制信道的相应资源分配给所述控制消息,以便在控制消息和所述控制消息之间引起相应的干扰可能性 至少一个另外的控制消息与通过为通信系统定义的总体性能度量上的控制消息和至少一个其他控制消息之间的干扰的相应影响相反,通过将专用资源分配给第一控制消息 其干扰对整体性能测量具有高度影响,并且将共享资源分配给第二控制消息,对于该第二控制消息,干扰对整体性能度量具有低影响。 使用分配的资源通过控制信道从发射机发送控制消息。
    • 96. 发明授权
    • Method and apparatus for equalizing CDMA signals
    • 用于均衡CDMA信号的方法和装置
    • US08548028B2
    • 2013-10-01
    • US13430635
    • 2012-03-26
    • Daniel Yellin
    • Daniel Yellin
    • H04B1/00
    • H04B1/7103H04B1/71055H04B1/7107H04B1/7115H04L25/03019H04L2025/03617
    • A minimum mean square error (MMSE) equalizer corresponding to a plurality of receive antennas is generated using (i) channel information for a first plurality of users including a desired user, (ii) a ratio of white noise power to noise power due to code division multiple access (CDMA) signals corresponding to the first plurality of users, (iii) channel information for a second plurality of users served by another base station, and (iv) a ratio of noise power due to CDMA signals corresponding to the second plurality of users to noise power due to CDMA signals corresponding to the first plurality of users. CDMA signals received by a plurality of antennas are filtered using the MMSE equalizer. The CDMA signals are despread using a spread code corresponding to the desired user.
    • 使用(i)包括期望用户的第一多个用户的信道信息来生成对应于多个接收天线的最小均方误差(MMSE)均衡器,(ii)由于代码产生的白噪声功率与噪声功率的比率 对应于第一多个用户的多分组多址(CDMA)信号,(iii)由另一基站服务的第二多个用户的信道信息,以及(iv)由与第二多个用户对应的CDMA信号引起的噪声功率比 的用户由于与第一多个用户对应的CDMA信号而产生的噪声功率。 使用MMSE均衡器对由多个天线接收的CDMA信号进行滤波。 使用对应于期望用户的扩展码对CDMA信号进行解扩。
    • 98. 发明授权
    • Feedback strategies for multi-user MIMO communication systems
    • 多用户MIMO通信系统的反馈策略
    • US08457236B2
    • 2013-06-04
    • US12723645
    • 2010-03-14
    • Krishna Srikanth GomadamDaniel YellinYu-Ngok Li
    • Krishna Srikanth GomadamDaniel YellinYu-Ngok Li
    • H04B7/02
    • H04B7/0452H04B7/0417H04B7/0632
    • A method for signal processing in a receiver includes receiving in the receiver a Multi-User Multiple-Input Multiple-Output (MU-MIMO) signal. The MU-MIMO signal includes at least a first signal, which is precoded using a first precoding scheme and is addressed to the receiver, and a second signal, which is precoded using a second precoding scheme. An average error rate achievable in decoding the first signal in the presence of the second signal is computed. The average error rate is computed over a set of possible choices of the second precoding scheme. The first precoding scheme is selected from among a plurality of available precoding schemes so as to satisfy a criterion defined over the average error rate. The receiver sends feedback to a transmitter transmitting the first signal. The feedback depends on the selected first precoding scheme and causes the transmitter to control transmission of the first signal.
    • 一种接收机中的信号处理方法包括在接收机中接收多用户多输入多输出(MU-MIMO)信号。 MU-MIMO信号至少包括第一信号,其使用第一预编码方案进行预编码,并且被寻址到接收机;以及第二信号,其使用第二预编码方案被预编码。 计算在存在第二信号的情况下解码第一信号时可实现的平均错误率。 在第二预编码方案的一组可能选择上计算平均错误率。 从多个可用预编码方案中选择第一预编码方案,以便满足在平均错误率上定义的标准。 接收机向发送第一个信号的发射机发送反馈。 反馈取决于所选择的第一预编码方案,并且使得发射机控制第一信号的传输。