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1. 发明授权

US07027523B2 Method and apparatus for transmitting data in a time division duplexed (TDD) communication system 有权
公开(公告)号：US07027523B2
公开(公告)日：2006-04-11
申请号：US09887225
申请日：2001-06-22
申请人： Ahmad Jalali , John E. Smee , Mark Wallace
发明人： Ahmad Jalali , John E. Smee , Mark Wallace
IPC分类号： H04L25/03
CPC分类号： H04L1/0032 , H04B7/0434 , H04B7/0626 , H04L1/0003 , H04L1/0013 , H04L1/0026 , H04L1/0034 , H04L1/06 , H04L5/0023 , H04L25/0204 , H04L25/0224 , H04L25/0226 , H04L25/03343 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.

2. 发明授权

US06522683B1 Method and apparatus for adaptive linear equalization for walsh covered modulation 有权
公开(公告)号：US06522683B1
公开(公告)日：2003-02-18
申请号：US09636008
申请日：2000-08-10
申请人： John E. Smee , Ahmad Jalali , Fuyun Ling , Mark Wallace
发明人： John E. Smee , Ahmad Jalali , Fuyun Ling , Mark Wallace
IPC分类号： H04B169
CPC分类号： H04B1/7097 , H04L25/03038 , H04L2025/03375 , H04L2025/03477
摘要： A receive filter receives signals from a communication channel. The received signals correspond to original Walsh covered chip sequences transmitted by a transmit filter through the communication channel to the receive filter. The received signals are processed by an equalizer to generate a soft estimate of chip sequences corresponding to the original Walsh covered chip sequences. An N chip Walsh decover is then utilized to generate a soft estimate of code symbols corresponding to the soft estimate of the chip sequences. A number of symbol slicers are then used in parallel to produce a hard estimate of the code symbols corresponding to the soft estimate of code symbols generated by the N chip Walsh decover. Thereafter an N chip Walsh cover is used as part of a scheme to generate a hard estimate of chip sequences corresponding to the hard estimate of the code symbols generated by the symbol slicers. The hard estimate of the chip sequences generated with the aid of the N chip Walsh cover, and the soft estimate of the chip sequences generated by the equalizer, are used to generate a tracking mode error signal to adapt the response of the equalizer to the received signals.

3. 发明申请

US20100074152A1 METHOD AND APPARATUS FOR TRANSMITTING DATA IN A TIME DIVISION DUPLEXED (TDD) COMMUNICATION SYSTEM 有权
标题翻译：用于在时分双工（TDD）通信系统中发送数据的方法和装置
公开(公告)号：US20100074152A1
公开(公告)日：2010-03-25
申请号：US12547732
申请日：2009-08-26
申请人： Ahmad Jalali , John E. Smee , Mark Wallace
发明人： Ahmad Jalali , John E. Smee , Mark Wallace
IPC分类号： H04J3/00 , H04L27/28
CPC分类号： H04L1/0032 , H04B7/0434 , H04B7/0626 , H04L1/0003 , H04L1/0013 , H04L1/0026 , H04L1/0034 , H04L1/06 , H04L5/0023 , H04L25/0204 , H04L25/0224 , H04L25/0226 , H04L25/03343 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.
摘要翻译：在时分双工（TDD）通信系统中处理用于传输的数据的技术。在一个方面，基于来自终端的反向链路传输（例如，导频）在基站处估计前向链路的频率响应在前向链路上的数据传输之前，基站基于由终端发送的导频，使用校准功能“校准”反向传递函数，以导出正向传递函数的估计，以及基于从前向传递函数导出的权重的前提条件调制符号。在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得所发送的数据能够以期望的性能水平由终端接收。

4. 发明授权

US07333560B2 Method and apparatus for transmitting data in a time division duplexed (TDD) communication system 有权
标题翻译：用于在时分双工（TDD）通信系统中发送数据的方法和装置
公开(公告)号：US07333560B2
公开(公告)日：2008-02-19
申请号：US11328807
申请日：2006-01-09
申请人： Ahmad Jalali , John E. Smee , Mark Wallace
发明人： Ahmad Jalali , John E. Smee , Mark Wallace
IPC分类号： H04K1/02
CPC分类号： H04L1/0032 , H04B7/0434 , H04B7/0626 , H04L1/0003 , H04L1/0013 , H04L1/0026 , H04L1/0034 , H04L1/06 , H04L5/0023 , H04L25/0204 , H04L25/0224 , H04L25/0226 , H04L25/03343 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.
摘要翻译：在时分双工（TDD）通信系统中处理用于传输的数据的技术。在一个方面，基于来自终端的反向链路传输（例如，导频）在基站处估计前向链路的频率响应。在前向链路上的数据传输之前，基站基于终端发送的导频来确定反向传递函数，使用校准函数“校准”反向传递函数，以导出前向传递函数的估计，以及前提条件基于从前向传递函数导出的权重的调制符号。在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得所发送的数据能够以期望的性能水平由终端接收。

5. 发明授权

US08121217B2 Method and apparatus for transmitting data in a time division duplexed (TDD) communication system 有权
标题翻译：用于在时分双工（TDD）通信系统中发送数据的方法和装置
公开(公告)号：US08121217B2
公开(公告)日：2012-02-21
申请号：US12547732
申请日：2009-08-26
申请人： Ahmad Jalali , John E. Smee , Mark Wallace
发明人： Ahmad Jalali , John E. Smee , Mark Wallace
IPC分类号： H04K1/02
CPC分类号： H04L1/0032 , H04B7/0434 , H04B7/0626 , H04L1/0003 , H04L1/0013 , H04L1/0026 , H04L1/0034 , H04L1/06 , H04L5/0023 , H04L25/0204 , H04L25/0224 , H04L25/0226 , H04L25/03343 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.
摘要翻译：在时分双工（TDD）通信系统中处理用于传输的数据的技术。在一个方面，基于来自终端的反向链路传输（例如，导频）在基站处估计前向链路的频率响应。在前向链路上的数据传输之前，基站基于终端发送的导频来确定反向传递函数，使用校准功能“校准”反向传递函数，以导出前向传递函数的估计，以及前提条件基于从前向传递函数导出的权重的调制符号。在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得所发送的数据能够以期望的性能水平由终端接收。

6. 发明授权

US07035316B2 Method and apparatus for adaptive linear equalization for Walsh covered modulation 有权
标题翻译：用于沃尔什覆盖调制的自适应线性均衡的方法和装置
公开(公告)号：US07035316B2
公开(公告)日：2006-04-25
申请号：US10315707
申请日：2002-12-09
申请人： John E. Smee , Ahmad Jalali , Fuyun Ling , Mark Wallace
发明人： John E. Smee , Ahmad Jalali , Fuyun Ling , Mark Wallace
IPC分类号： H04B1/69 , H03K5/159
CPC分类号： H04B1/7097 , H04L25/03038 , H04L2025/03375 , H04L2025/03477
摘要： A receive filter receives signals from a communication channel. The received signals correspond to original Walsh covered chip sequences transmitted by a transmit filter through the communication channel to the receive filter. The received signals are processed by an equalizer to generate a soft estimate of chip sequences corresponding to the original Walsh covered chip sequences. An N chip Walsh decover is then utilized to generate a soft estimate of code symbols corresponding to the soft estimate of the chip sequences. A number of symbol slicers are then used in parallel to produce a hard estimate of the code symbols corresponding to the soft estimate of code symbols generated by the N chip Walsh decover. Thereafter an N chip Walsh cover is used as part of a scheme to generate a hard estimate of chip sequences corresponding to the hard estimate of the code symbols generated by the symbol slicers. The hard estimate of the chip sequences generated with the aid of the N chip Walsh cover, and the soft estimate of the chip sequences generated by the equalizer, are used to generate a tracking mode error signal to adapt the response of the equalizer to the received signals.
摘要翻译：接收滤波器从通信信道接收信号。接收到的信号对应于由发射滤波器通过通信信道发射到接收滤波器的原始沃尔什覆盖码片序列。所接收的信号由均衡器处理以产生对应于原始沃尔什覆盖码片序列的码片序列的软估计。然后利用N个芯片沃尔什解密来产生对应于芯片序列的软估计的码符号的软估计。然后，并行地使用多个符号限幅器，以产生对应于由N个芯片沃尔什覆盖生成的码符号的软估计对应的码符号的硬估计。此后，N芯片沃尔什覆盖被用作方案的一部分，以产生对应于由符号限幅器产生的码符号的硬估计的码片序列的硬估计。借助于N芯片沃尔什覆盖生成的芯片序列的硬估计和由均衡器产生的芯片序列的软估计被用于产生跟踪模式误差信号，以使均衡器的响应适应于接收到的信号。

7. 发明授权

US07397844B2 Method and apparatus for processing a modulated signal using an equalizer and a rake receiver 有权
标题翻译：使用均衡器和耙式接收器来处理调制信号的方法和装置
公开(公告)号：US07397844B2
公开(公告)日：2008-07-08
申请号：US11267070
申请日：2005-11-03
申请人： John E. Smee , Ahmad Jalali
发明人： John E. Smee , Ahmad Jalali
IPC分类号： H04B1/00
CPC分类号： H04B7/0854 , H04B1/7115 , H04L25/03019 , H04L2025/03617 , H04L2025/03662 , H04L2025/03777
摘要： In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized within an equalizer to generate symbol estimates, which may be subsequently processed (e.g., despread and decovered) to provide a first stream of recovered symbols. Each sample stream is filtered with a set of coefficients and may be scaled with a scaling factor. The scaled samples for all streams are then combined to generate the symbol estimates. The sample stream(s) may also be processed by a second processing scheme with one or more rake receivers to provide a second stream of recovered symbols. The signal quality for each processing scheme can be estimated and used to select either the first or second processing scheme.
摘要翻译：在用于实现更高S / N的方法中，接收和处理一个或多个信号以提供一个或多个采样流。在第一处理方案中，在均衡器内均衡采样流以产生符号估计，其可以随后被处理（例如，解扩和解复用）以提供恢复符号的第一流。用一组系数对每个采样流进行滤波，并可以用缩放因子进行缩放。然后将所有流的缩放样本组合以生成符号估计。样本流也可以由具有一个或多个耙式接收器的第二处理方案来处理，以提供第二回收符号流。可以估计每个处理方案的信号质量并用于选择第一或第二处理方案。

8. 发明授权

US07082174B1 Method and apparatus for processing a modulated signal using an equalizer and a rake receiver 有权
标题翻译：使用均衡器和耙式接收器来处理调制信号的方法和装置
公开(公告)号：US07082174B1
公开(公告)日：2006-07-25
申请号：US09624319
申请日：2000-07-24
申请人： John E. Smee , Ahmad Jalali
发明人： John E. Smee , Ahmad Jalali
IPC分类号： H04B1/10
CPC分类号： H04B7/0854 , H04B1/7115 , H04L25/03019 , H04L2025/03617 , H04L2025/03662 , H04L2025/03777
摘要： In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized and combined within an equalizer to generate symbol estimates, which may be subsequently processed (e.g., despread and decovered) to provide a first stream of recovered symbols. The sample stream(s) may be equalized prior to being combined. In this case, each sample stream is filtered with a set of coefficients and may be scaled with a scaling factor. The scaled samples for all streams are then combined to generate the symbol estimates. Alternatively, the sample stream(s) may be combined prior to being equalized. In this case, each sample stream is scaled by a scaling factor. The scaled samples for all streams are then combined to generate summed samples that are further filtered with a set of coefficients to generate the symbol estimates. The sample stream(s) may also be processed by a second processing scheme with one or more rake receivers to provide a second stream of recovered symbols. The signal quality for each processing scheme can be estimated and used to select either the first or second processing scheme.
摘要翻译：在用于实现更高S / N的方法中，接收和处理一个或多个信号以提供一个或多个采样流。在第一处理方案中，在均衡器内均衡和组合采样流以产生符号估计，其可以随后被处理（例如，解扩和解复用）以提供第一回收符号流。样品流可以在组合之前相等。在这种情况下，用一组系数对每个样本流进行滤波，并且可以用缩放因子进行缩放。然后将所有流的缩放样本组合以生成符号估计。或者，样品流可以在均衡之前组合。在这种情况下，每个采样流被缩放因子。然后将所有流的经缩放的样本组合以产生用一组系数进一步滤波以产生符号估计的求和样本。样本流也可以由具有一个或多个耙式接收器的第二处理方案来处理，以提供第二回收符号流。可以估计每个处理方案的信号质量并用于选择第一或第二处理方案。

9. 发明申请

US20100034146A1 METHOD AND APPARATUS FOR SUPPORTING MULTI-USER AND SINGLE-USER MIMO IN A WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：在无线通信系统中支持多用户和单用户MIMO的方法和装置
公开(公告)号：US20100034146A1
公开(公告)日：2010-02-11
申请号：US12536366
申请日：2009-08-05
申请人： Jilei Hou , John E. Smee , Durga Prasad Malladi , Navid Hassanpour Ghady , Siddhartha Mallik
发明人： Jilei Hou , John E. Smee , Durga Prasad Malladi , Navid Hassanpour Ghady , Siddhartha Mallik
IPC分类号： H04W40/00
CPC分类号： H04B7/024 , H04B7/0417 , H04B7/0452 , H04B7/0626 , H04B7/0639
摘要： Techniques for supporting distributed multiple-input multiple-output (MIMO) transmissions are described. In one design, a user equipment (UE) determines channel estimates for multiple cells and reports the channel estimates. The UE thereafter receives a data transmission sent by the multiple cells to the UE based on the channel estimates. The data transmission may include at least one data stream, and each data stream may be sent by one cell or the multiple cells to the UE. In another design, a UE determines first and second channel estimates for first and second cells, respectively, and reports the channel estimates. The UE then receives a first data transmission sent by the first cell to the UE based on the first channel estimate. The UE also receives a second data transmission sent by the second cell to another UE and steered away from the UE based on the second channel estimate.
摘要翻译：描述了用于支持分布式多输入多输出（MIMO）传输的技术。在一种设计中，用户设备（UE）确定多个小区的信道估计并报告信道估计。 UE然后基于信道估计来接收由多个小区发送到UE的数据传输。数据传输可以包括至少一个数据流，并且每个数据流可以由一个小区或多个小区发送到UE。在另一种设计中，UE分别为第一和第二小区确定第一和第二信道估计，并报告信道估计。然后，UE基于第一信道估计来接收第一小区向UE发送的第一数据传输。 UE还接收由第二小区发送到另一个UE的第二数据传输，并且基于第二信道估计导向远离UE。

10. 发明授权

US09755705B2 Method and apparatus for supporting multi-user and single-user MIMO in a wireless communication system 有权
公开(公告)号：US09755705B2
公开(公告)日：2017-09-05
申请号：US12536366
申请日：2009-08-05
申请人： Jilei Hou , John E. Smee , Durga Prasad Malladi , Navid Hassanpour Ghady , Siddhartha Mallik
发明人： Jilei Hou , John E. Smee , Durga Prasad Malladi , Navid Hassanpour Ghady , Siddhartha Mallik
IPC分类号： H04W4/00 , H04B7/024 , H04B7/0417 , H04B7/0452 , H04B7/06
CPC分类号： H04B7/024 , H04B7/0417 , H04B7/0452 , H04B7/0626 , H04B7/0639
摘要： Techniques for supporting distributed multiple-input multiple-output (MIMO) transmissions are described. In one design, a user equipment (UE) determines channel estimates for multiple cells and reports the channel estimates. The UE thereafter receives a data transmission sent by the multiple cells to the UE based on the channel estimates. The data transmission may include at least one data stream, and each data stream may be sent by one cell or the multiple cells to the UE. In another design, a UE determines first and second channel estimates for first and second cells, respectively, and reports the channel estimates. The UE then receives a first data transmission sent by the first cell to the UE based on the first channel estimate. The UE also receives a second data transmission sent by the second cell to another UE and steered away from the UE based on the second channel estimate.

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