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1. 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。

2. 发明授权

US08442168B2 Interference cancellation with a time-sliced architecture 有权
公开(公告)号：US08442168B2
公开(公告)日：2013-05-14
申请号：US13453282
申请日：2012-04-23
申请人： Emad Farag , Sridhar Gollamudi , Robert Soni
发明人： Emad Farag , Sridhar Gollamudi , Robert Soni
IPC分类号： H04L25/08 , H04L1/00 , H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10
CPC分类号： H04L1/1845 , H04L1/0048
摘要： Example embodiments include methods of interference cancellation at NodeB receivers of baseband antenna signals including physical channels. The methods include canceling interference from a received baseband antenna signal by removing a reconstructed baseband signal from the processed received baseband antenna signal. The processed reconstructed baseband signal includes users whose physical data channel signals were successfully decoded. Methods also include removing interference from a received baseband signal to form an interference cancelled baseband signal that will be processed by the receiver. The interference cancelled baseband signal is the received baseband antenna signal minus users' signal interference contributions whose demodulated physical data channel signals have a determined user symbol energy value that exceeds a threshold. Methods further include removing interference from a user's signal to be error corrected. The interference is symbol interference from an earlier successfully decoded user's symbols. The user symbol interference is determined by cross correlations.

3. 发明授权

US08150404B2 Methods for frequency-selective persistent scheduling 有权
标题翻译：频率选择性持续调度方法
公开(公告)号：US08150404B2
公开(公告)日：2012-04-03
申请号：US12076189
申请日：2008-03-14
申请人： Sridhar Gollamudi
发明人： Sridhar Gollamudi
IPC分类号： H04W72/00
CPC分类号： H04W72/04 , H04W72/044 , H04W72/12
摘要： Methods for allocating wireless resources are provided. In one method, time domain resources are persistently allocated to a user for a data transmission during a transmission time interval, and frequency domain resources are dynamically allocated to the user for the data transmission during the transmission time interval. Methods provide flexibility for overbooking resources for any TTI to obtain statistical multiplexing gains.
摘要翻译：提供了分配无线资源的方法。在一种方法中，在传输时间间隔期间，持续地将时域资源分配给用户进行数据传输，并且在传输时间间隔期间，频域资源被动态分配给用户进行数据传输。方法为任何TTI的超量资源提供灵活性，以获得统计复用增益。

4. 发明申请

US20080240034A1 Methods for frequency-selective persistent scheduling 有权
标题翻译：频率选择性持续调度方法
公开(公告)号：US20080240034A1
公开(公告)日：2008-10-02
申请号：US12076189
申请日：2008-03-14
申请人： Sridhar Gollamudi
发明人： Sridhar Gollamudi
IPC分类号： H04Q7/00
CPC分类号： H04W72/04 , H04W72/044 , H04W72/12
摘要： Methods for allocating wireless resources are provided. In one method, time domain resources are persistently allocated to a user for a data transmission during a transmission time interval, and frequency domain resources are dynamically allocated to the user for the data transmission during the transmission time interval. Methods provide flexibility for overbooking resources for any TTI to obtain statistical multiplexing gains.
摘要翻译：提供了分配无线资源的方法。在一种方法中，在传输时间间隔期间，持续地将时域资源分配给用户进行数据传输，并且在传输时间间隔期间，频域资源被动态分配给用户进行数据传输。方法为任何TTI的超量资源提供灵活性，以获得统计复用增益。

5. 发明授权

US06915477B2 Delay sensitive adaptive quality control loop for rate adaptation 有权
标题翻译：用于速率适配的延迟敏感自适应质量控制回路
公开(公告)号：US06915477B2
公开(公告)日：2005-07-05
申请号：US10033335
申请日：2001-12-28
申请人： Sridhar Gollamudi , Pantelis Monogioudis
发明人： Sridhar Gollamudi , Pantelis Monogioudis
IPC分类号： H04L1/00 , H04L1/18 , H03M13/00
CPC分类号： H04L1/0021 , H04L1/0003 , H04L1/0009 , H04L1/0016 , H04L1/0017 , H04L1/0025 , H04L1/0026 , H04L1/1819
摘要： An adaptive quality control loop for link rate adaptation that selectively adjusts channel condition thresholds based on delay sensitivity of data packets being transmitted. For wireless communication systems incorporating an error correction scheme using re-transmissions, the quality control loop adaptively adjusts channel condition thresholds more frequently for delay sensitive data packets, such as video, and less frequently for delay insensitive data packets, such as text messaging. Channel condition thresholds may be adjusted using fixed or variable steps based on error detection results.
摘要翻译：用于链路速率适配的自适应质量控制环路，其基于正在发送的数据分组的延迟灵敏度选择性地调整信道状态阈值。对于包含使用重传的错误校正方案的无线通信系统，质量控制环路对诸如视频的延迟敏感数据分组更频繁地调整信道状态阈值，并且对于诸如文本消息之类的延迟不敏感数据分组来说较不频繁。可以使用基于错误检测结果的固定或可变步长来调整通道状态阈值。

6. 发明授权

US07787530B2 Multi-channel adapative quality control loop for link rate adaptation in data packet communications 有权
标题翻译：用于数据包通信中链路速率适配的多信道适应质量控制环路
公开(公告)号：US07787530B2
公开(公告)日：2010-08-31
申请号：US10033338
申请日：2001-12-28
申请人： Sridhar Gollamudi , Pantelis Monogioudis
发明人： Sridhar Gollamudi , Pantelis Monogioudis
IPC分类号： H04B3/46 , H04B17/00
CPC分类号： H04L1/0021 , H04B2201/70703 , H04J13/16 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/16 , H04L1/203
摘要： An adaptive quality control loop for link rate adaptation based on modulation and/or coding schemes (also referred to as “MCS levels”) and one or more spreading codes that adaptively selects channel condition thresholds in real-time without measuring all the factors that affect selecting optimal channel condition thresholds. The adaptive quality control loop involves adjusting the channel condition thresholds with variable up and down steps based on target quality metrics along with measurements such as error detection results, relative frequencies of visiting each MCS level, and transmitted data rates, wherein the target quality metrics can be a block error rate or bit error rate target criterion. If the target quality metric is a block error rate target criterion, the variable step is determined using a desired MCS error rate based on MCS probabilities, MCS error rates and the block error rate target criterion. If the target quality metric is a bit error rate target criterion, the variable step is determined using a desired MCS error rate based on MCS probabilities, MCS error rates, average rate of bit errors, data rate, and the bit error rate target criterion.
摘要翻译：用于基于调制和/或编码方案（也称为“MCS级别”）的链路速率适配的自适应质量控制环路以及实时自适应地选择信道状态阈值的一个或多个扩展码，而不测量影响的所有因素选择最佳信道条件阈值。自适应质量控制循环包括基于目标质量度量以及诸如错误检测结果，访问每个MCS级别的相对频率和传输的数据速率的测量结果，以可变的上下步骤来调整信道条件阈值，其中目标质量度量可以是块错误率或位错误率目标标准。如果目标质量度量是块错误率目标标准，则基于MCS概率，MCS错误率和块错误率目标标准，使用期望的MCS错误率确定可变步长。如果目标质量度量是误码率目标准则，则基于MCS概率，MCS错误率，比特误差平均率，数据速率和误码率目标标准，使用期望的MCS错误率确定可变步长。

7. 发明申请

US20100202575A1 Interference cancellation with a time-sliced architecture 有权
标题翻译：采用时间片式架构的干扰消除
公开(公告)号：US20100202575A1
公开(公告)日：2010-08-12
申请号：US12379024
申请日：2009-02-11
申请人： Emad Farag , Sridhar Gollamudi , Robert Soni
发明人： Emad Farag , Sridhar Gollamudi , Robert Soni
IPC分类号： H03D1/04 , H04L1/18 , G06F11/14
CPC分类号： H04L1/1845 , H04L1/0048
摘要： Example embodiments include methods of interference cancellation at NodeB receivers of baseband antenna signals including physical channels. The methods include canceling interference from a received baseband antenna signal by removing a reconstructed baseband signal from the processed received baseband antenna signal. The processed reconstructed baseband signal includes users whose physical data channel signals were successfully decoded. Methods also include removing interference from a received baseband signal to form an interference cancelled baseband signal that will be processed by the receiver. The interference cancelled baseband signal is the received baseband antenna signal minus users' signal interference contributions whose demodulated physical data channel signals have a determined user symbol energy value that exceeds a threshold. Methods further include removing interference from a user's signal to be error corrected. The interference is symbol interference from an earlier successfully decoded user's symbols. The user symbol interference is determined by cross correlations.
摘要翻译：示例实施例包括在节点B接收机处的干扰消除的方法，包括物理信道的基带天线信号。所述方法包括通过从经处理的接收基带天线信号中去除重构的基带信号来消除来自接收的基带天线信号的干扰。经处理的重构基带信号包括其物理数据信道信号被成功解码的用户。方法还包括从接收到的基带信号中去除干扰以形成由接收机处理的干扰消除的基带信号。干扰消除的基带信号是接收的基带天线信号减去用户的信号干扰贡献，其解调的物理数据信道信号具有超过阈值的确定的用户符号能量值。方法还包括从用户的信号中去除要纠错的信号。干扰是较早成功解码的用户符号的符号干扰。用户符号干扰由互相关确定。

8. 发明授权

US07693099B2 Methods of wireless communication 有权
标题翻译：无线通信方法
公开(公告)号：US07693099B2
公开(公告)日：2010-04-06
申请号：US10853362
申请日：2004-05-26
申请人： Sridhar Gollamudi , Shirish Nagaraj
发明人： Sridhar Gollamudi , Shirish Nagaraj
IPC分类号： H04W4/00
CPC分类号： H04L1/1812 , H04L1/1607 , H04L69/16 , H04L69/165 , H04W72/1226
摘要： In a method of wireless communication, signaling information in a received signal may be detected using a detection parameter. The detection parameter may be determined based on at least one of a probability of false alarm and a target probability of false alarm. Another method may detect signaling information using an estimated transmission probability value for a subsequent time instant that is determined based on an estimated transmission probability value for a current time instant. The detection parameter may also be determined from the estimated probability of transmission values.
摘要翻译：在无线通信的方法中，可以使用检测参数来检测接收信号中的信令信息。检测参数可以基于假警报的概率和目标误报概率中的至少一个来确定。另一种方法可以使用基于当前时刻的估计传输概率值确定的后续时刻的估计传输概率值来检测信令信息。检测参数也可以根据传输值的估计概率来确定。

9. 发明授权

US08306164B2 Interference cancellation with a time-sliced architecture 有权
标题翻译：采用时间片式架构的干扰消除
公开(公告)号：US08306164B2
公开(公告)日：2012-11-06
申请号：US12379024
申请日：2009-02-11
申请人： Emad Farag , Sridhar Gollamudi , Robert Soni
发明人： Emad Farag , Sridhar Gollamudi , Robert Soni
IPC分类号： H04L25/08 , H04L1/00 , H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10
CPC分类号： H04L1/1845 , H04L1/0048
摘要： Example embodiments include methods of interference cancellation at NodeB receivers of baseband antenna signals including physical channels. The methods include canceling interference from a received baseband antenna signal by removing a reconstructed baseband signal from the processed received baseband antenna signal. The processed reconstructed baseband signal includes users whose physical data channel signals were successfully decoded. Methods also include removing interference from a received baseband signal to form an interference cancelled baseband signal that will be processed by the receiver. The interference cancelled baseband signal is the received baseband antenna signal minus users' signal interference contributions whose demodulated physical data channel signals have a determined user symbol energy value that exceeds a threshold. Methods further include removing interference from a user's signal to be error corrected. The interference is symbol interference from an earlier successfully decoded user's symbols. The user symbol interference is determined by cross correlations.
摘要翻译：示例实施例包括在节点B接收机处的干扰消除的方法，包括物理信道的基带天线信号。所述方法包括通过从经处理的接收基带天线信号中去除重构的基带信号来消除来自接收的基带天线信号的干扰。经处理的重构基带信号包括其物理数据信道信号被成功解码的用户。方法还包括从接收到的基带信号中去除干扰以形成由接收机处理的干扰消除的基带信号。干扰消除的基带信号是接收的基带天线信号减去用户的信号干扰贡献，其解调的物理数据信道信号具有超过阈值的确定的用户符号能量值。方法还包括从用户的信号中去除要纠错的信号。干扰是较早成功解码的用户符号的符号干扰。用户符号干扰由互相关确定。

10. 发明申请

US20120207249A1 INTERFERENCE CANCELLATION WITH A TIME-SLICED ARCHITECTURE 有权
公开(公告)号：US20120207249A1
公开(公告)日：2012-08-16
申请号：US13453282
申请日：2012-04-23
申请人： Emad Farag , Sridhar Gollamudi , Robert Soni
发明人： Emad Farag , Sridhar Gollamudi , Robert Soni
IPC分类号： H04B1/10
CPC分类号： H04L1/1845 , H04L1/0048
摘要： Example embodiments include methods of interference cancellation at NodeB receivers of baseband antenna signals including physical channels. The methods include canceling interference from a received baseband antenna signal by removing a reconstructed baseband signal from the processed received baseband antenna signal. The processed reconstructed baseband signal includes users whose physical data channel signals were successfully decoded. Methods also include removing interference from a received baseband signal to form an interference cancelled baseband signal that will be processed by the receiver. The interference cancelled baseband signal is the received baseband antenna signal minus users' signal interference contributions whose demodulated physical data channel signals have a determined user symbol energy value that exceeds a threshold. Methods further include removing interference from a user's signal to be error corrected. The interference is symbol interference from an earlier successfully decoded user's symbols. The user symbol interference is determined by cross correlations.

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