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11. 发明授权

US07457366B2 System and method for adaptive phase compensation of OFDM signals 失效
标题翻译： OFDM信号自适应相位补偿的系统和方法
公开(公告)号：US07457366B2
公开(公告)日：2008-11-25
申请号：US10675215
申请日：2003-09-30
申请人： Alexander A. Maltsev , Alexey E. Rubtsov , Alexei M. Soupikov
发明人： Alexander A. Maltsev , Alexey E. Rubtsov , Alexei M. Soupikov
IPC分类号： H04K1/10
CPC分类号： H04L27/2657 , H04L27/2675 , H04L27/2695
摘要： An OFDM receiver applies phase compensation to subcarriers of data symbols of an OFDM packet. A phase compensation estimate is generated from pilot subcarriers within the data symbol and applied to the subcarriers of the data symbol prior to demapping. The pilot subcarriers of the data symbol are combined and weighted to generate an observation vector. Recursive filtering is performed on the observation vector to generate the phase compensation estimate. The recursive filtering may include performing an extended Kalman-type filtering (EKF) operation on the observation vector using a channel estimate, an additive noise power estimate, a signal to noise ratio (SNR) estimate and a priori information about a dynamic model of the phase noise spectrum of transceiver oscillators. The channel estimate may be generated from a long training symbol of the OFDM packet, and the additive noise power estimate and the SNR estimate may be generated from short training symbols of the OFDM packet.
摘要翻译： OFDM接收机对OFDM分组的数据符号的子载波进行相位补偿。从数据符号内的导频子载波产生相位补偿估计，并将其应用于解映射之前的数据符号的子载波。数据符号的导频子载波被组合和加权以产生观测向量。对观测向量进行递归滤波，生成相位补偿估计。递归滤波可以包括使用信道估计，加性噪声功率估计，信噪比（SNR）估计和有关动态模型的先验信息对观测向量执行扩展卡尔曼型滤波（EKF）收发器振荡器的相位噪声谱。可以从OFDM分组的长训练符号生成信道估计，并且可以从OFDM分组的短训练符号生成加性噪声功率估计和SNR估计。

12. 发明授权

US08730894B2 Variable bandwidth OFDM receiver and methods for receiving OFDM signals of different bandwidths 有权
标题翻译：可变带宽OFDM接收机和接收不同带宽的OFDM信号的方法
公开(公告)号：US08730894B2
公开(公告)日：2014-05-20
申请号：US13267134
申请日：2011-10-06
申请人： Ali S Sadri , Alexander A. Maltsev , Sergey E Sergeyev , Alexei V Dayydov , Vadim S Sergeyev
发明人： Ali S Sadri , Alexander A. Maltsev , Sergey E Sergeyev , Alexei V Dayydov , Vadim S Sergeyev
IPC分类号： H04W4/00 , H04W72/00 , H04W28/04 , H04W24/00
CPC分类号： H04W28/04 , H04B7/0857 , H04B7/0874 , H04L5/0023 , H04L27/2608 , H04L27/2647 , H04W24/00
摘要： A variable bandwidth OFDM receiver and methods for receiving OFDM signals of different bandwidths are generally disclosed herein. The variable bandwidth OFDM receiver may be configured to receive signals over wider bandwidths by processing a resource block of subcarriers comprising a greater number of subcarriers, and receive signals over narrower bandwidths by processing a resource block of subcarriers comprising a lesser number of subcarriers. The resource blocks have a number of OFDM symbols in a time dimension to define a time slot, and each wherein the resource block comprises a minimum number of subcarriers for a narrowest bandwidth for a predetermined minimum bandwidth reception and a predetermined maximum number of subcarriers for a maximum bandwidth reception. In some embodiments, the variable bandwidth receiver may operate in accordance with an 3GPP LTE E-UTRAN standard.
摘要翻译：本文一般公开了一种可变带宽OFDM接收机和用于接收不同带宽的OFDM信号的方法。可变带宽OFDM接收机可以被配置为通过处理包括更多数量的子载波的子载波的资源块，并且通过处理包括较少数量子载波的子载波的资源块，通过较窄带宽接收信号来在较宽带宽上接收信号。资源块在时间维度上具有多个OFDM符号以定义时隙，并且每个资源块包括用于预定最小带宽接收的最窄带宽的最小数量的子载波和用于一个预定最小带宽接收的预定最大数量的子载波最大带宽接收。在一些实施例中，可变带宽接收机可以根据3GPP LTE E-UTRAN标准进行操作。

13. 发明授权

US08396147B2 MIMO transmitter for transmitting a group of sequential OFDM symbols using a plurality of antennas 有权
标题翻译： MIMO发射机，用于使用多个天线发送一组顺序OFDM符号
公开(公告)号：US08396147B2
公开(公告)日：2013-03-12
申请号：US12757117
申请日：2010-04-09
申请人： John S. Sadowsky , Minnie Ho , Eric A. Jacobsen , Alexander A. Maltsev , Ali S. Sadri , Sumeet Sandhu
发明人： John S. Sadowsky , Minnie Ho , Eric A. Jacobsen , Alexander A. Maltsev , Ali S. Sadri , Sumeet Sandhu
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04W16/28 , H04B7/0408 , H04L27/2602 , H04W74/02
摘要： A MIMO transmitter and method for transmitting a group of sequential OFDM symbols on a downlink channel using a plurality of antennas is disclosed herein. Groups of OFDM subcarriers are individually modulated in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers, corresponding symbol-modulated subcarriers are combined for transmission on each of a plurality of spatial channels, and beamforming is performed on the combined symbol-modulated subcarriers for transmission over the spatial channels. The channel comprises a plurality of the groups of the OFDM subcarriers and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments. The spatial-frequency subcarrier modulation assignments for each group are determined based on feedback by a receiver, which is determined from spatial channel characteristics of the spatial channels.
摘要翻译：这里公开了一种用于使用多个天线在下行链路信道上发送一组顺序OFDM符号的MIMO发射器和方法。根据空间 - 频率副载波调制分配对OFDM子载波组进行单独调制，以生成符号调制子载波组，将多个空间信道中的每一个组合对应的符号调制副载波进行传输，并对组合用于在空间信道上传输的符号调制副载波。信道包括多个OFDM子载波组和每个子载波组内的OFDM子载波，并且在每组顺序OFDM符号内具有相同的空间频率副载波调制分配。基于由空间信道的空间信道特性确定的接收机的反馈来确定每个组的空间频率副载波调制分配。

14. 发明申请

US20120250778A1 MODULATION SCHEME FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS OR THE LIKE 有权
标题翻译：正交频分复用系统或类似的调制方案
公开(公告)号：US20120250778A1
公开(公告)日：2012-10-04
申请号：US13494233
申请日：2012-06-12
申请人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
发明人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
IPC分类号： H04W52/20
CPC分类号： H04L5/0046 , H04L5/0007 , H04L5/006
摘要： Briefly, in accordance with one embodiment of the invention, bit and power loading may be utilized to select a modulation rate and subcarrier power scaling based on channel state information. As a result, a higher data rate may be utilized for a given signal-to-noise ratio while maintaining a constant bit error rate.
摘要翻译：简而言之，根据本发明的一个实施例，可以利用比特和功率负载来选择基于信道状态信息的调制速率和子载波功率缩放。结果，在保持恒定误码率的同时，可以对给定的信噪比利用更高的数据速率。

15. 发明申请

US20100195485A1 CHANNEL ESTIMATION FEEDBACK IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM OR THE LIKE 有权
标题翻译：正交频分多址系统中的信道估计反馈
公开(公告)号：US20100195485A1
公开(公告)日：2010-08-05
申请号：US12649058
申请日：2009-12-29
申请人： Ali S. Sadri , Alexander A. Maltsev , Valery V. Cherepennikov
发明人： Ali S. Sadri , Alexander A. Maltsev , Valery V. Cherepennikov
IPC分类号： H04J11/00 , H04W72/04
CPC分类号： H04B7/0626 , H04B7/0636 , H04L25/0202 , H04L27/2601
摘要： Briefly, in accordance with one embodiment of the invention, a channel state information packet is encoded by a receiver side device and is fed back to the transmitter side device. The transmitter side device decodes the channel state information packet to extract an estimate of the channel response function.
摘要翻译：简而言之，根据本发明的一个实施例，信道状态信息分组由接收机侧设备编码，并被反馈到发射机侧设备。发射机侧设备对信道状态信息分组进行解码以提取信道响应函数的估计。

16. 发明授权

US07394873B2 Adaptive channel estimation for orthogonal frequency division multiplexing systems or the like 有权
标题翻译：用于正交频分复用系统的自适应信道估计等
公开(公告)号：US07394873B2
公开(公告)日：2008-07-01
申请号：US10379650
申请日：2003-03-05
申请人： Alexander A. Maltsev , Andrey V. Pudeyev , Ali S. Sadri
发明人： Alexander A. Maltsev , Andrey V. Pudeyev , Ali S. Sadri
IPC分类号： H04L27/00
CPC分类号： H04L25/0216 , H04L25/0218 , H04L25/022 , H04L25/0226 , H04L25/025 , H04L27/2647
摘要： Briefly, in accordance with one embodiment of the invention, a channel estimator may be adapted to provide a channel estimate based at least in part on an estimated delay spread. The channel estimator may be adapted to provide a more accurate channel estimation in the event of a lower estimated delay spread. In one embodiment, the channel estimator provides a frequency domain channel estimate, and in another embodiment the channel estimator provides a time domain channel estimate.
摘要翻译：简而言之，根据本发明的一个实施例，信道估计器可以适于至少部分地基于估计的延迟扩展来提供信道估计。信道估计器可以适于在估计延迟扩展较低的情况下提供更准确的信道估计。在一个实施例中，信道估计器提供频域信道估计，并且在另一实施例中，信道估计器提供时域信道估计。

17. 发明授权

US07345989B2 Adaptive channelization scheme for high throughput multicarrier systems 有权
标题翻译：高吞吐量多载波系统的自适应信道化方案
公开(公告)号：US07345989B2
公开(公告)日：2008-03-18
申请号：US10812284
申请日：2004-03-29
申请人： Ali S. Sadri , Alexander A. Maltsev , Vadim S. Sergeyev
发明人： Ali S. Sadri , Alexander A. Maltsev , Vadim S. Sergeyev
IPC分类号： H04Q7/20
CPC分类号： H04L5/0046 , H04L5/0007 , H04L5/006 , H04L5/06
摘要： Adaptive channelization is achieved in a high throughput multicarrier system by first subdividing a high throughput channel into a number of frequency sub-channels. A channelization decision may then be made within a device as to which of the sub-channels to use for a corresponding high throughput wireless link based on channel state information.
摘要翻译：通过首先将高吞吐量信道细分成多个频率子信道，在高吞吐量多载波系统中实现自适应信道化。然后可以在设备内基于信道状态信息在相应的高吞吐量无线链路中使用哪个子信道进行信道化决定。

18. 发明授权

US09166741B2 OFDM transmitter with variable code block interleaver and method for OFDM communications with variable code block sizes 有权
标题翻译：具有可变码块交织器的OFDM发射机和用于具有可变码块大小的OFDM通信的方法
公开(公告)号：US09166741B2
公开(公告)日：2015-10-20
申请号：US13544120
申请日：2012-07-09
申请人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
发明人： Alexander A. Maltsev , Ali S. Sadri , Alexei V. Davydov
IPC分类号： H04L1/00 , H04L27/26
CPC分类号： H04L1/0071 , H04L1/0042 , H04L27/2608 , H04L27/2628
摘要： A multi-antenna transmitter is configured for orthogonal frequency division multiplexed (OFDM) communications. The multi-antenna transmitter includes circuitry to receive an input bit sequence for code block segmentation including adding filler bits based on a selected code block size, a encoder to encode the bit sequence and an interleaver configurable to perform interleaving operations on blocks of bits of various code block sizes of the bit sequence. A controller is to select the code block size for the interleaver and OFDM transmitter circuitry to transmit OFDM symbols on subcarriers utilizing more than one antenna. The OFDM symbols are generated at least in part from the interleaved blocks.
摘要翻译：多天线发射机被配置用于正交频分复用（OFDM）通信。多天线发射机包括用于接收用于码块分段的输入比特序列的电路，包括基于选择的码块大小添加填充比特，对比特序列进行编码的编码器和可配置为对各种比特的块进行交织操作的交织器比特序列的码块大小。控制器是选择用于交织器和OFDM发射机电路的码块大小，以利用多于一个天线的子载波上的OFDM符号。至少部分地从交织块生成OFDM符号。

19. 发明授权

US08289865B2 Method and apparatus to exchange channel information 有权
标题翻译：交换频道信息的方法和装置
公开(公告)号：US08289865B2
公开(公告)日：2012-10-16
申请号：US12397349
申请日：2009-03-04
申请人： Alexander A. Maltsev , Ali S. Sadri , Vadim S. Sergeyev , Sergey Tiraspolsky
发明人： Alexander A. Maltsev , Ali S. Sadri , Vadim S. Sergeyev , Sergey Tiraspolsky
IPC分类号： H04L12/28
CPC分类号： H04L1/0025 , H04L1/0003 , H04L1/0009 , H04L1/0028 , H04L1/16 , H04L5/0007 , H04L5/0046 , H04L5/006
摘要： A method and apparatus to exchange channel state information between two or more stations is provided. The channel state information may be used to adapt a power, a transmission rate and a modulation scheme of a transmitted signal. Other embodiments are described and claimed.
摘要翻译：提供了一种在两个或更多个站之间交换信道状态信息的方法和装置。信道状态信息可以用于调整发射信号的功率，传输速率和调制方案。描述和要求保护其他实施例。

20. 发明授权

US08040847B2 Channel estimation feedback in an orthogonal frequency division multiplexing system or the like 有权
标题翻译：正交频分复用系统中的信道估计反馈等
公开(公告)号：US08040847B2
公开(公告)日：2011-10-18
申请号：US12649058
申请日：2009-12-29
申请人： Ali S. Sadri , Alexander A. Maltsev , Valery V. Cherepennikov
发明人： Ali S. Sadri , Alexander A. Maltsev , Valery V. Cherepennikov
IPC分类号： H04J4/00
CPC分类号： H04B7/0626 , H04B7/0636 , H04L25/0202 , H04L27/2601
摘要： Briefly, in accordance with one embodiment of the invention, a channel state information packet is encoded by a receiver side device and is fed back to the transmitter side device. The transmitter side device decodes the channel state information packet to extract an estimate of the channel response function.
摘要翻译：简而言之，根据本发明的一个实施例，信道状态信息分组由接收机侧设备编码，并被反馈到发射机侧设备。发射机侧设备对信道状态信息分组进行解码以提取信道响应函数的估计。

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