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1. 发明授权

US06542560B1 Method of channel estimation and compensation based thereon 有权
标题翻译：基于此的信道估计和补偿方法
公开(公告)号：US06542560B1
公开(公告)日：2003-04-01
申请号：US09296654
申请日：1999-04-23
申请人： R. Michael Buehrer , Shang-Chieh Liu , Steven P. Nicoloso , Dirck Uptegrove
发明人： R. Michael Buehrer , Shang-Chieh Liu , Steven P. Nicoloso , Dirck Uptegrove
IPC分类号： H04L100
CPC分类号： H04L25/024
摘要： The method of channel estimation determines linear regression coefficients for N blocks of a first signal component in a received signal on a block-by-block basis, and determines a channel estimate based on the linear regression coefficients for the N blocks. Using the channel estimate, channel distortion in a second signal component of the received signal can be significantly eliminated.
摘要翻译：信道估计方法基于逐块地确定接收信号中的第一信号分量的N个块的线性回归系数，并且基于N个块的线性回归系数来确定信道估计。使用信道估计，可以显着地消除接收信号的第二信号分量中的信道失真。

2. 发明授权

US06614857B1 Iterative channel estimation and compensation based thereon 有权
标题翻译：基于迭代信道估计和补偿
公开(公告)号：US06614857B1
公开(公告)日：2003-09-02
申请号：US09296409
申请日：1999-04-23
申请人： R. Michael Buehrer , Shang-Chieh Liu , Steven P. Nicoloso
发明人： R. Michael Buehrer , Shang-Chieh Liu , Steven P. Nicoloso
IPC分类号： H04L2706
CPC分类号： H04L25/0236
摘要： The method of channel estimation generates an initial channel estimate from a pilot signal in a received signal, and estimates the data in the received signal using the channel estimate. An updated channel estimate is then obtained from the estimated data. This process of estimating the data and re-estimating the channel estimate is reiterated a desired number of times to refine the accuracy of the channel estimate.
摘要翻译：信道估计的方法从接收信号中的导频信号产生初始信道估计，并且使用信道估计来估计接收信号中的数据。然后从估计数据获得更新的信道估计。重复估计数据和重新估计信道估计的这个过程，以期提高信道估计的准确性所需的次数。

3. 发明授权

US06363103B1 Multistage interference cancellation for CDMA applications using M-ary orthogonal moduation 失效
标题翻译：使用M-ary正交调制的CDMA应用的多级干扰消除
公开(公告)号：US06363103B1
公开(公告)日：2002-03-26
申请号：US09058065
申请日：1998-04-09
申请人： R. Michael Buehrer , Sridhar Gollamudi , Steven P. Nicoloso
发明人： R. Michael Buehrer , Sridhar Gollamudi , Steven P. Nicoloso
IPC分类号： H04L2730
CPC分类号： H04B1/71072
摘要： A multistage or parallel interference canceler (PIC) arrangement is disclosed for use in a communications system using code division multiple access (CDMA) with M-ary orthogonal modulation. All the M symbol waveforms, weighted according to their correlations with a despread signal, are combined to form a reconstructed symbol waveform for each user in each stage. The reconstructed symbol waveforms for all users are summed to form an estimated composite received signal having reduced interference which is subtracted from the composite received signal to generate a residual interference signal (RIS). While the total received signal is despread in the first stage of the PIC, the RIS or cancellation residue signal from the immediately preceding stage is used in succeeding stages of the PIC. A final decision is made by despreading the RIS from the final stage of the PIC, correlating it with the M symbol waveforms using an FHT. A weight vector from the final stage is then added to the output of the FHT. The real part or the squared magnitude of the resulting correlations, depending, respectively, on whether coherent or noncoherent demodulation is used, is then taken. The final symbol decision is made by selecting the symbol corresponding to the maximum component resulting decision statistic vector.
摘要翻译：公开了一种使用具有M进制正交调制的码分多址（CDMA）的通信系统中的多级或并联干扰消除器（PIC）装置。根据与去扩展信号的相关性加权的所有M个符号波形被组合以在每个阶段中为每个用户形成重构符号波形。将所有用户的重构符号波形相加以形成具有减小的干扰的估计复合接收信号，其从复合接收信号中减去以产生残留干扰信号（RIS）。虽然在PIC的第一级中解扩了总接收信号，但是在PIC的后续阶段使用来自紧接在前级的RIS或消除残留信号。最终决定通过从PIC的最后阶段解扩RIS，使用FHT将其与M个符号波形相关联。然后将来自最终级的权重向量加到FHT的输出中。然后，取决于相关或非相干解调的结果相关性的实部或平方幅度。通过选择对应于最大成分判定统计量向量的符号来进行最终符号判定。

4. 发明授权

US6157847A Base station system including parallel interference cancellation processor 有权
标题翻译：基站系统包括并行干扰消除处理器
公开(公告)号：US6157847A
公开(公告)日：2000-12-05
申请号：US342145
申请日：1999-06-29
申请人： R. Michael Buehrer , Mark D. Hahm , Shang-Chieh Liu , Steven P. Nicoloso
发明人： R. Michael Buehrer , Mark D. Hahm , Shang-Chieh Liu , Steven P. Nicoloso
IPC分类号： H04J13/04 , H04B1/10 , H04B1/12 , H04B7/04 , H04B7/155 , H04B7/24 , H04M1/00 , H04B15/00
CPC分类号： H04B1/126
摘要： The base station system includes a cancellation processor connected to a plurality of conventional signal processors. Under the control of a controller, the signal processors acquire user signals in signals received by the base station antennas. The controller controls the cancellation processor to perform cancellation operations with respect to the acquired user signals. The cancellation processor includes first-nth filter stages. Each filter stage operates in the same manner. A filter stage obtains, in parallel, the acquired user signals from signals supplied thereto by estimating symbols in the acquired user signals under the control of the controller. The cancellation processor also includes a cancellation stage associated with each filter stage. Each cancellation stage cancels, in parallel, the obtained user signals output from the associated filter stage from the signals received by the base station antennas. The resulting residual signals output from a cancellation stage are supplied to the next filter stage, and the signals supplied to the first filter stage are the signals received by the base station antennas. A cancellation stage cancels the obtained user signals received thereby from the received signals at a substantially same time with respect to the received signals.
摘要翻译：基站系统包括连接到多个传统信号处理器的取消处理器。在控制器的控制下，信号处理器以基站天线接收的信号获取用户信号。控制器控制取消处理器对所获取的用户信号执行取消操作。取消处理器包括第n个滤波器级。每个过滤器阶段以相同的方式操作。滤波器级并行地通过在控制器的控制下估计获取的用户信号中的符号来获得来自所提供的信号的所获取的用户信号。取消处理器还包括与每个滤波器级相关联的取消级。每个取消阶段并行地从由基站天线接收的信号中取消从相关联的滤波器级输出的获得的用户信号。从消除级输出的残留信号被提供给下一个滤波级，提供给第一滤波级的信号是由基站天线接收的信号。消除阶段相对于接收到的信号在基本相同的时间从接收到的信号中取消所获得的用户信号。

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