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1.发明申请METHOD AND APPARATUS FOR WIDEBAND TRANSMISSION BASED ON MULTI-USER MIMO AND TWO-WAY TRAINING 审中-公开基于多用户MIMO和双向培训的宽带传输方法与装置公开(公告)号：US20090075686A1
公开(公告)日：2009-03-19
申请号：US12209110
申请日：2008-09-11
IPC分类号： H04B7/00
CPC分类号： H04B7/0417 , H04B7/0452 , H04B7/0465 , H04B7/0617 , H04B7/0626 , H04L25/0204 , H04L25/0224 , H04L27/2601
摘要： A method, apparatus and system is disclosed herein for wireless transmission based on MU-MIMO and two-way training. In one embodiment, the system comprises a set of K receivers and at least one transmitter having a set of N transmit antennas, where the transmitter is operable to precode a signal for downlink transmission to each receiver in the set of K receivers based on multi-user MIMO using precoding derived based on two-way channel training between the set of K receivers and the set of N transmit antennas
摘要翻译： 本文公开了一种基于MU-MIMO和双向训练的无线传输的方法，装置和系统。 在一个实施例中，系统包括一组K个接收机和至少一个具有一组N个发射天线的发射机，其中发射机可操作地基于多个发射天线预先编码用于下行链路传输到该K个接收机组中的每个接收机的信号， 用户MIMO使用基于K组接收机组和N组发射天线之间的双向信道训练得到的预编码
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公开(公告)号：US08619918B2
公开(公告)日：2013-12-31
申请号：US12395679
申请日：2009-03-01
IPC分类号： H04L27/06
CPC分类号： H04L25/0204 , H04L25/022 , H04L25/0224
摘要： A method for sparse channel estimation in MIMO OFDM systems with a plurality of subchannels having the same sparsity structure is presented. The inventive method comprises initializing a plurality of residual vectors and observation generating matrices modeling the channel, sending a pilot signal for each subcarrier, converting the pilot signals to tap positions, detecting an optimal tap position, updating the residual vectors by removing the one residual vector having the optimal tap position, updating the generating matrices in accordance with the optimal residual vector, calculating weighted residuals based on the updated residual vectors, and repeating the steps, except initializing, until a stopping condition is met, wherein the updated observation matrices estimate the sparse channel. In one embodiment, the observation generating matrices are omitted. In one embodiment, multiple vectors are removed during one iteration. Pilot placement and pilot allocation techniques are presented to optimize the method.
摘要翻译： 提出了具有相同稀疏结构的多个子信道的MIMO OFDM系统中稀疏信道估计的方法。 本发明的方法包括：初始化多个残差向量和建立该信道的观测生成矩阵，为每个子载波发送导频信号，将导频信号转换成抽头位置，检测最佳抽头位置，通过去除一个残差向量来更新残差向量 具有最佳抽头位置，根据最佳残差矢量更新生成矩阵，基于更新后的残差向量计算加权残差，并重复除了初始化之外的步骤，直到满足停止条件为止，其中更新后的观测矩阵估计 稀疏频道 在一个实施例中，省略观察生成矩阵。 在一个实施例中，在一次迭代期间移除多个向量。 提出了试点布置和导频分配技术，以优化方法。
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公开(公告)号：US20100074358A1
公开(公告)日：2010-03-25
申请号：US12395679
申请日：2009-03-01
IPC分类号： H04L1/02
CPC分类号： H04L25/0204 , H04L25/022 , H04L25/0224
摘要： A method for sparse channel estimation in MIMO OFDM systems with a plurality of subchannels having the same sparsity structure is presented. The inventive method comprises initializing a plurality of residual vectors and observation generating matrices modeling the channel, sending a pilot signal for each subcarrier, converting the pilot signals to tap positions, detecting an optimal tap position, updating the residual vectors by removing the one residual vector having the optimal tap position, updating the generating matrices in accordance with the optimal residual vector, calculating weighted residuals based on the updated residual vectors, and repeating the steps, except initializing, until a stopping condition is met, wherein the updated observation matrices estimate the sparse channel. In one embodiment, the observation generating matrices are omitted. In one embodiment, multiple vectors are removed during one iteration. Pilot placement and pilot allocation techniques are presented to optimize the method.
摘要翻译： 提出了具有相同稀疏结构的多个子信道的MIMO OFDM系统中稀疏信道估计的方法。 本发明的方法包括初始化多个残差向量和观测生成矩阵，对该信道进行建模，为每个子载波发送导频信号，将导频信号转换成抽头位置，检测最佳抽头位置，通过去除一个残差向量来更新残差向量 具有最佳抽头位置，根据最佳残差矢量更新生成矩阵，基于更新后的残差向量计算加权残差，并重复除了初始化之外的步骤，直到满足停止条件为止，其中更新后的观测矩阵估计 稀疏频道 在一个实施例中，省略观察生成矩阵。 在一个实施例中，在一次迭代期间移除多个向量。 提出了试点布置和导频分配技术，以优化方法。
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