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51. 发明授权

US07869536B2 Method and apparatus for scaling a signal for improving performance of a receiver in a MIMO system 有权
标题翻译：用于缩小信号以提高MIMO系统中的接收机的性能的方法和装置
公开(公告)号：US07869536B2
公开(公告)日：2011-01-11
申请号：US11753121
申请日：2007-05-24
申请人： Yingxue Li , Robert Lind Olesen
发明人： Yingxue Li , Robert Lind Olesen
IPC分类号： H04L1/02
CPC分类号： H04B7/0413 , H04L1/20 , H04L25/0204 , H04L25/0242 , H04L25/0256 , H04L25/067 , H04L2025/03414 , H04L2025/0342 , H04L2025/03426
摘要： A multiple-input multiple-output (MIMO) receiver includes a MIMO decoder, a pre-scaling unit, a demapper, and a post-scaling unit. The MIMO decoder performs a MIMO decoding on received signals to decouple a plurality of symbols transmitted via a plurality of data streams. Both pre-demapping scaling and post-demapping scaling are performed to improve the performance of the receiver. A pre-scaling coefficient is applied to the symbols by the pre-scaling unit to generate pre-scaled symbols. The pre-scaled symbols are converted to soft bits by the demapper. The post-scaling unit then applies a post-scaling coefficient to the soft bits. The post-scaling coefficient is a signal-to-interference and noise ratio (SINR). Cross interference is taken into account in post-demapping scaling to obtain more accurate soft bits for subsequent decoding. The present invention is applicable to both a multi-carrier system, (such as orthogonal frequency division multiplexing (OFDM)), and a single carrier system.
摘要翻译：多输入多输出（MIMO）接收机包括MIMO解码器，预缩放单元，解映射器和后定标单元。 MIMO解码器对接收到的信号执行MIMO解码以去耦经由多个数据流发送的多个符号。执行预映射缩放和后解映射缩放以提高接收机的性能。通过预缩放单元将预缩放系数应用于符号以生成预缩放符号。预分解符号由解映射器转换为软位。然后，缩放后单元将比例缩放系数应用于软比特。后缩放系数是信噪比（SINR）。在后解映射缩放中考虑到交叉干扰，以获得更准确的软比特用于后续解码。本发明适用于多载波系统（例如正交频分复用（OFDM））和单载波系统。

52. 发明授权

US07864659B2 Quality control scheme for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems 有权
标题翻译：用于多输入多输出（MIMO）正交频分复用（OFDM）系统的质量控制方案
公开(公告)号：US07864659B2
公开(公告)日：2011-01-04
申请号：US11118867
申请日：2005-04-29
申请人： Chang-Soo Koo , Robert Lind Olesen
发明人： Chang-Soo Koo , Robert Lind Olesen
IPC分类号： H04J11/00
CPC分类号： H04B7/0417 , H04B17/336 , H04L1/0002 , H04L1/0026 , H04L5/0023 , H04L5/0046 , H04L5/006 , H04L5/0064 , H04L27/2601 , Y02D50/10
摘要： A method and apparatus for optimizing the system capacity of an Orthogonal Frequency Division Multiplexing (OFDM) system that uses with Multiple-Input Multiple-Output (MIMO) antennas. In a receiver, a target quality of service (QoS) metric and reference data rate are set. The target QoS metric may be set to a predetermined value and/or may be adjusted dynamically with respect to packet error rate (PER) by a slow outer-loop control processor. The QoS of received signals are measured and compared to the target QoS. Depending on the comparison, the receiver generates a channel quality indicator (CQI) which is sent back to the transmitting transmitter. The CQI is a one or two bit indicator which indicates to the transmitter to disable, adjust or maintain data transmission rates of particular sub-carriers, groups of sub-carriers per transmit antenna, or groups of sub-carriers across all transmit antennas. At the transmitter, the transmitted data rate is disabled, adjusted or maintained. At the receiver, the target QoS metric and reference data rate are adjusted accordingly. This process is repeated for each data frame of each sub-carrier group.
摘要翻译：一种用于优化与多输入多输出（MIMO）天线一起使用的正交频分复用（OFDM）系统的系统容量的方法和装置。在接收机中，设置目标服务质量（QoS）度量和参考数据速率。可以将目标QoS度量设置为预定值和/或可以通过慢速外部环路控制处理器相对于分组错误率（PER）动态地调整。测量接收信号的QoS并将其与目标QoS进行比较。根据比较，接收机产生信道质量指示符（CQI），其被发送回发送发射机。 CQI是一个或两个比特指示符，其向发射机指示禁用，调整或维持特定子载波，每个发射天线的子载波组或跨所有发射天线的子载波组的数据传输速率。在发射机处，传输的数据速率被禁用，调整或维护。在接收机处，相应地调整目标QoS度量和参考数据速率。对于每个子载波组的每个数据帧重复该处理。

53. 发明授权

US07532723B2 Tokens/keys for wireless communications 有权
标题翻译：用于无线通信的令牌/密钥
公开(公告)号：US07532723B2
公开(公告)日：2009-05-12
申请号：US10996493
申请日：2004-11-23
申请人： Prabhakar R. Chitrapu , Alain Charles Louis Briancon , Akinlolu Oloruntosi Kumoluyi , Alan Gerald Carlton , Kiran Kumar S. Vanganuru , Richard Dan Herschaft , John Erich Hoffmann , John Thommana , Debashish Purkayastha , Guodong Zhang , Robert Lind Olesen , Alexander Reznik , TieJun Shan , Sung-Hyuk Shin , Amit Singhal
发明人： Prabhakar R. Chitrapu , Alain Charles Louis Briancon , Akinlolu Oloruntosi Kumoluyi , Alan Gerald Carlton , Kiran Kumar S. Vanganuru , Richard Dan Herschaft , John Erich Hoffmann , John Thommana , Debashish Purkayastha , Guodong Zhang , Robert Lind Olesen , Alexander Reznik , TieJun Shan , Sung-Hyuk Shin , Amit Singhal
IPC分类号： H04L9/00 , G06F7/58
CPC分类号： H04W12/04 , H04L9/3234 , H04L9/3247 , H04L2463/061 , H04L2463/103 , H04W12/02 , H04W12/10 , H04W88/02
摘要： Tokens/keys are produced for wireless communications. These tokens/keys are used for watermarks, signature insertion, encryption and other uses. In one embodiment, contextual information is used to generate tokens/keys. The tokens/keys may be derived directly from the contextual information. The contextual information may be used in conjunction with other information to derive the tokens/keys. Tokens/keys may be exchanged between transmit/receive units. The exchange of these tokens/keys may be encrypted.
摘要翻译：产生用于无线通信的令牌/密钥。这些令牌/密钥用于水印，签名插入，加密和其他用途。在一个实施例中，使用上下文信息来生成令牌/密钥。令牌/密钥可以直接从上下文信息导出。上下文信息可以与其他信息一起使用以导出令牌/密钥。令牌/密钥可以在发送/接收单元之间交换。这些令牌/密钥的交换可以被加密。

54. 发明申请

US20080305745A1 METHOD AND APPARATUS FOR SUPPORTING UPLINK TRANSMISSION OF CHANNEL QUALITY AND CODING INFORMATION IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：支持在无线通信系统中上行传输信道质量和编码信息的方法和装置
公开(公告)号：US20080305745A1
公开(公告)日：2008-12-11
申请号：US12131345
申请日：2008-06-02
申请人： Guodong Zhang , Robert Lind Olesen
发明人： Guodong Zhang , Robert Lind Olesen
IPC分类号： H04B17/00
CPC分类号： H04L1/0026 , H04L1/0029 , H04L1/1671
摘要： A method and apparatus for feedback in a wireless transmit receive unit (WTRU) includes transmitting feedback over an aggregate of predefined control channel elements (CCEs) wherein the feedback is one of a channel quality indicator (CQI), a precoding matrix index (PMI) or a rank index.
摘要翻译：用于无线发射接收单元（WTRU）中的反馈的方法和装置包括：通过预定义的控制信道单元（CCE）的聚合来发送反馈，其中反馈是信道质量指示符（CQI），预编码矩阵索引（PMI）或等级指数。

55. 发明申请

US20080260054A1 METHOD AND APPARATUS FOR REDUCING A PEAK-TO-AVERAGE POWER RATIO IN A MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM 审中-公开
标题翻译：用于减少多输入多输出系统中的峰值平均功率比的方法和装置
公开(公告)号：US20080260054A1
公开(公告)日：2008-10-23
申请号：US11839773
申请日：2007-08-16
申请人： Hyung G. Myung , Kyle Jung-Lin Pan , Robert Lind Olesen , Donald M. Grieco
发明人： Hyung G. Myung , Kyle Jung-Lin Pan , Robert Lind Olesen , Donald M. Grieco
IPC分类号： H04L27/28
CPC分类号： H04L27/2614 , H04B7/0639 , H04B7/066 , H04L25/0204 , H04L27/2623 , H04L27/2624
摘要： A method and apparatus for reducing a peak-to-average power ratio (PAPR) in a multiple-input multiple-output (MIMO) wireless communication system are disclosed. Transmit beamforming or precoding is performed on transmit symbols based on a channel matrix. For feedback, channel matrices may be averaged over multiple subcarriers and the averaged channel matrices may be further quantized. In order to reduce the PAPR, amplitude clipping may be performed on the symbols after the transmit processing. The amplitude clipping may be performed by hard clipping, soft clipping, or smooth clipping.
摘要翻译：公开了一种减少多输入多输出（MIMO）无线通信系统中的峰均功率比（PAPR）的方法和装置。基于信道矩阵对发射符号执行发射波束形成或预编码。对于反馈，信道矩阵可以在多个子载波上进行平均，并且平均的信道矩阵可以被进一步量化。为了减少PAPR，可以对发送处理之后的符号执行幅度削波。幅度削波可以通过硬削波，软削波或平滑削波来执行。

56. 发明申请

US20080225822A1 TRANSMISSION OF ACK/NACK AND TRANSMIT POWER CONTROL FEEDBACK IN EVOLVED UTRA 审中-公开
标题翻译：发送ACK / NACK和发送功率控制反馈在演进的UTRA
公开(公告)号：US20080225822A1
公开(公告)日：2008-09-18
申请号：US12048262
申请日：2008-03-14
申请人： Guodong Zhang , Robert Lind Olesen , Allan Yingming Tsai , Donald M. Grieco
发明人： Guodong Zhang , Robert Lind Olesen , Allan Yingming Tsai , Donald M. Grieco
IPC分类号： H04J1/00
CPC分类号： H04L5/023
摘要： A method for transmitting feedback information for a wireless transmit receive unit (WTRU) includes multiplexing the feedback information with an uplink shared channel, mapping the multiplexed feedback information to orthogonal frequency division multiplex (OFDM) symbols and transmitting the feedback information to an e Node B. The method also includes multiplexing the feedback information with the uplink shared channel using distributed frequency division multiplexing (FDM), mapping the feedback information to a first OFDM symbol, and distributing the mapped feedback information equidistantly across the transmission bandwidth.
摘要翻译：用于发送用于无线发射接收单元（WTRU）的反馈信息的方法包括：将反馈信息与上行链路共享信道进行复用，将多路复用的反馈信息映射到正交频分复用（OFDM）符号，并将反馈信息发送到e节点B 该方法还包括使用分布式频分复用（FDM）将反馈信息与上行链路共享信道进行多路复用，将反馈信息映射到第一OFDM符号，并将映射的反馈信息等距地分布在传输带宽上。

57. 发明授权

US07406130B2 Method and system for optimization of channel estimation and synchronization in an OFDM-MIMO wireless communication system 失效
标题翻译： OFDM-MIMO无线通信系统中信道估计和同步优化的方法和系统
公开(公告)号：US07406130B2
公开(公告)日：2008-07-29
申请号：US11524225
申请日：2006-09-20
申请人： Yuejin Huang , Robert Lind Olesen , Chang-Soo Koo
发明人： Yuejin Huang , Robert Lind Olesen , Chang-Soo Koo
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L27/262 , H04B7/02 , H04B7/0684 , H04L25/0212 , H04L25/0224 , H04L25/0226 , H04L27/261 , H04L27/2614
摘要： The present invention is related to a method and system for optimization of channel estimation and synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) Multiple-Input Multiple-Output (MIMO) wireless communication system. In accordance with the present invention, all of the training sequences are simply constructed based on a basic code by cyclically shifting the basic code. The training sequences are transmitted from different antennas in parallel without performing inverse fast Fourier transform. As a result, there is no peak-to-average ratio problem. Channel estimation is performed in each receiver based on the samples before fast Fourier transform and the maximum-likelihood estimate of channel response in time domain is then mapped into the frequency domain. The channel estimation is not only very simple in implementation, but also very efficient in computation.
摘要翻译：本发明涉及一种用于在正交频分复用（OFDM）多输入多输出（MIMO）无线通信系统中优化信道估计和同步的方法和系统。根据本发明，通过循环移位基本代码，基于基本代码简单地构建所有的训练序列。训练序列并行地从不同的天线发射，而不进行快速傅立叶逆变换。因此，没有峰均比例问题。基于快速傅立叶变换之前的样本在每个接收机中执行信道估计，然后将时域中的信道响应的最大似然估计值映射到频域。信道估计不仅在实现上非常简单，而且在计算上也非常有效。

58. 发明申请

US20070280387A1 METHOD AND APPARATUS FOR SCALING A SIGNAL FOR IMPROVING PERFORMANCE OF A RECEIVER IN A MIMO SYSTEM 有权
标题翻译：用于扩展用于提高MIMO系统中接收机性能的信号的方法和装置
公开(公告)号：US20070280387A1
公开(公告)日：2007-12-06
申请号：US11753121
申请日：2007-05-24
申请人： Yingxue Li , Robert Lind Olesen
发明人： Yingxue Li , Robert Lind Olesen
IPC分类号： H04L1/02
CPC分类号： H04B7/0413 , H04L1/20 , H04L25/0204 , H04L25/0242 , H04L25/0256 , H04L25/067 , H04L2025/03414 , H04L2025/0342 , H04L2025/03426
摘要： A multiple-input multiple-output (MIMO) receiver includes a MIMO decoder, a pre-scaling unit, a demapper, and a post-scaling unit. The MIMO decoder performs a MIMO decoding on received signals to decouple a plurality of symbols transmitted via a plurality of data streams. Both pre-demapping scaling and post-demapping scaling are performed to improve the performance of the receiver. A pre-scaling coefficient is applied to the symbols by the pre-scaling unit to generate pre-scaled symbols. The pre-scaled symbols are converted to soft bits by the demapper. The post-scaling unit then applies a post-scaling coefficient to the soft bits. The post-scaling coefficient is a signal-to-interference and noise ratio (SINR). Cross interference is taken into account in post-demapping scaling to obtain more accurate soft bits for subsequent decoding. The present invention is applicable to both a multi-carrier system, (such as orthogonal frequency division multiplexing (OFDM)), and a single carrier system.
摘要翻译：多输入多输出（MIMO）接收机包括MIMO解码器，预缩放单元，解映射器和后定标单元。 MIMO解码器对接收到的信号执行MIMO解码以去耦经由多个数据流发送的多个符号。执行预映射缩放和后解映射缩放以提高接收机的性能。通过预缩放单元将预缩放系数应用于符号以生成预缩放符号。预分解符号由解映射器转换为软位。然后，缩放后单元将比例缩放系数应用于软比特。后缩放系数是信噪比（SINR）。在后解映射缩放中考虑到交叉干扰，以获得更准确的软比特用于后续解码。本发明适用于多载波系统（例如正交频分复用（OFDM））和单载波系统。

59. 发明授权

US07197289B2 Automatic gain control for a wireless transmit/receive unit in a time slotted data transmissions 有权
标题翻译：在时隙数据传输中对无线发射/接收单元进行自动增益控制
公开(公告)号：US07197289B2
公开(公告)日：2007-03-27
申请号：US10613463
申请日：2003-07-03
申请人： Eldad Zeira , Mihaela Beluri , Robert Lind Olesen , Rui Yang
发明人： Eldad Zeira , Mihaela Beluri , Robert Lind Olesen , Rui Yang
IPC分类号： H04B1/06
CPC分类号： H04W52/52
摘要： A system and method for automatic gain control for a wireless transmit and receive unit in a time-slotted communications system includes initializing an automatic gain control loop, sampling a received signal, and estimating the power of the received signal. The estimated power of the received signal is compared with a reference power level and an error signal is generated based upon the difference between the estimated power and the reference power level. The error signals generated by a plurality of received signals are accumulated in an accumulator, and the value of the accumulator is looked up in a table to locate a control word for an attenuator. The control word is then passed to the attenuator to adjust the gain.
摘要翻译：用于时隙通信系统中的无线发射和接收单元的自动增益控制的系统和方法包括：初始化自动增益控制环路，对接收到的信号进行采样，以及估计接收信号的功率。将接收信号的估计功率与参考功率电平进行比较，并且基于估计功率与参考功率电平之间的差产生误差信号。由多个接收信号产生的误差信号被累加在累加器中，并且在表中查找累加器的值以定位衰减器的控制字。然后将控制字传递给衰减器以调整增益。

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