-
公开(公告)号：US07881390B2
公开(公告)日：2011-02-01
申请号：US11291800
申请日：2005-11-30
IPC分类号： H04K1/10
CPC分类号： H04L27/2602 , H04L27/2607
摘要： Methods and apparatus provide increased symbol length with more subcarriers in a fixed-bandwidth system. The subcarriers spacing may be reduced to provide increased symbol length and enable higher throughput. In one implementation, a system compatible with the IEEE P802.11n proposal can use 128 subcarriers in 20 MHz operation to provide increased throughput in lower-bandwidth channel operation.
摘要翻译： 方法和装置在固定带宽系统中提供具有更多子载波的增加的符号长度。 可以减小子载波间隔以提供增加的符号长度并实现更高的吞吐量。 在一个实现中，与IEEE P802.11n提议兼容的系统可以在20MHz操作中使用128个子载波来在较低带宽信道操作中提供增加的吞吐量。
-
2.发明申请VARIABLE BANDWIDTH OFDM RECEIVER AND METHODS FOR RECEIVING OFDM SIGNALS OF DIFFERENT BANDWIDTHS 有权可变带宽OFDM接收机和接收不同带宽的OFDM信号的方法公开(公告)号：US20120026862A1
公开(公告)日：2012-02-02
申请号：US13267134
申请日：2011-10-06
申请人： Ali S. Sadri , Alexander A. Maltsev , Sergey E. Sergeyev , Alexei V. Davydov , Vadim S. Sergeyev
发明人： Ali S. Sadri , Alexander A. Maltsev , Sergey E. Sergeyev , Alexei V. Davydov , Vadim S. Sergeyev
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。
-
公开(公告)号：US20090196232A1
公开(公告)日：2009-08-06
申请号：US12397349
申请日：2009-03-04
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： 提供了一种用于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。
-
4.发明申请OFDM RECEIVER AND METHODS FOR OPERATING IN HIGH-THROUGHPUT AND INCREASED RANGE MODES 有权OFDM接收机及其在高通和增量范围下运行的方法公开(公告)号：US20100046671A1
公开(公告)日：2010-02-25
申请号：US12611289
申请日：2009-11-03
IPC分类号： H04L27/00
CPC分类号： H04W28/04 , H04B7/0857 , H04B7/0874 , H04L5/0023 , H04L27/2608 , H04L27/2647 , H04W24/00
摘要： An OFDM receiver operates in a high-throughput mode or an increased-range mode. The receiver includes FFT circuitry to generate frequency domain symbol-modulated subcarriers for a set of OFDM subcarriers. During the increased-range mode, data is received on a single subchannel and the FFT circuitry generates frequency domain symbol-modulated subcarriers for a set of OFDM subcarriers associated with the single subchannel. During the high-throughput mode, data is received on each subchannel of a plurality of subchannels and the FFT circuitry generates frequency domain symbol-modulated subcarriers for a different one of the subchannels. The OFDM receiver may operate in accordance with one of the IEEE 802.11 standards.
摘要翻译： OFDM接收机在高吞吐量模式或增加范围模式下工作。 接收机包括用于为一组OFDM子载波生成频域符号调制副载波的FFT电路。 在增加范围模式期间，在单个子信道上接收数据，并且FFT电路针对与单个子信道相关联的一组OFDM子载波生成频域符号调制副载波。 在高吞吐量模式期间，在多个子信道的每个子信道上接收数据，并且FFT电路为不同的一个子信道生成频域符号调制子载波。 OFDM接收机可以根据IEEE 802.11标准之一来操作。
-
公开(公告)号：US07460876B2
公开(公告)日：2008-12-02
申请号：US10330675
申请日：2002-12-30
CPC分类号： H04W52/42 , H04B7/0615 , H04L27/2601 , H04W52/24
摘要： Briefly, an adaptive transmitted power control scheme, which may be used in stations of a communication system, for example, a wireless communication system. The scheme may allocate transmission power to a communication station based on multiplying each of at least one transmitted subcarrier complex number by a corresponding subcarrier weight. Additionally, a detection scheme may detect whether a transmitted power control scheme according to an embodiment of the invention is used by stations of the communication system. The allocation of transmission power may be also used to transmit additional service information through channels.
摘要翻译： 简而言之，可以在通信系统的站中使用的自适应发射功率控制方案，例如无线通信系统。 该方案可以基于将至少一个发送的子载波复数中的每一个乘以相应的子载波权重来向通信站分配发送功率。 此外，检测方案可以检测根据本发明的实施例的发射功率控制方案是否由通信系统的站使用。 传输功率的分配也可用于通过信道传输附加业务信息。
-
6.发明授权公开(公告)号：US07345989B2
公开(公告)日：2008-03-18
申请号：US10812284
申请日：2004-03-29
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。
-
7.发明授权Multi-user MIMO receiver and method for receiving data units over a wideband channel 有权多用户MIMO接收机和用于通过宽带信道接收数据单元的方法公开(公告)号：US08681598B2
公开(公告)日：2014-03-25
申请号：US13007887
申请日：2011-01-17
申请人： Alexander A. Maltsev , Ali S. Sadri , Sergey E. Sergeyev , Alexander N. Belonozhkin , Vadim S. Sergeyev
发明人： Alexander A. Maltsev , Ali S. Sadri , Sergey E. Sergeyev , Alexander N. Belonozhkin , Vadim S. Sergeyev
CPC分类号： H04L27/2649 , H04B1/005 , H04B1/0057 , H04B1/16 , H04B1/406 , H04B7/0413 , H04L27/2608 , H04L27/2653
摘要： A multiple-input multiple output (MIMO) receiver includes circuitry to receive a MIMO transmission through a plurality of antennas over a channel comprising two or more 20 MHz portions of bandwidth. The MIMO transmission comprises a plurality of streams, each transmitted over a corresponding spatial channel and configured for reception by multiple user stations. The MIMO receiver also includes circuitry to simultaneously accumulate signal information within at least two or more of the 20 MHz portions of bandwidth. Each 20 MHz portion comprises a plurality of OFDM subcarriers. The MIMO receiver also includes circuitry to demodulate at least one of the steams using receive beamforming techniques. In this way, multi-user protocol data units can be received.
摘要翻译： 多输入多输出（MIMO）接收机包括通过包括两个或多个20MHz带宽部分的信道通过多个天线接收MIMO传输的电路。 MIMO传输包括多个流，每个流在相应的空间信道上传输并被配置为由多个用户站接收。 MIMO接收机还包括在20MHz带宽部分中的至少两个或更多个部分中同时累积信号信息的电路。 每个20MHz部分包括多个OFDM子载波。 MIMO接收机还包括使用接收波束成形技术解调至少一个蒸汽的电路。 以这种方式，可以接收多用户协议数据单元。
-
8.发明申请MULTI-USER MIMO RECEIVER AND METHOD FOR RECEIVING DATA UNITS OVER A WIDEBAND CHANNEL 有权多用户MIMO接收器和用于通过宽带信道接收数据单元的方法公开(公告)号：US20110110467A1
公开(公告)日：2011-05-12
申请号：US13007887
申请日：2011-01-17
申请人： Alexander A. Maltsev , Ali S. Sadri , Sergey E. Sergeyev , Alexander N. Belonozhkin , Vadim S. Sergeyev
发明人： Alexander A. Maltsev , Ali S. Sadri , Sergey E. Sergeyev , Alexander N. Belonozhkin , Vadim S. Sergeyev
IPC分类号： H03K9/00
CPC分类号： H04L27/2649 , H04B1/005 , H04B1/0057 , H04B1/16 , H04B1/406 , H04B7/0413 , H04L27/2608 , H04L27/2653
摘要： A multiple-input multiple output (MIMO) receiver includes circuitry to receive a MIMO transmission through a plurality of antennas over a channel comprising two or more 20 MHz portions of bandwidth. The MIMO transmission comprises a plurality of streams, each transmitted over a corresponding spatial channel and configured for reception by multiple user stations. The MIMO receiver also includes circuitry to simultaneously accumulate signal information within at least two or more of the 20 MHz portions of bandwidth. Each 20 MHz portion comprises a plurality of OFDM subcarriers. The MIMO receiver also includes circuitry to demodulate at least one of the steams using receive beamforming techniques. In this way, multi-user protocol data units can be received.
摘要翻译： 多输入多输出（MIMO）接收机包括通过包括两个或多个20MHz带宽部分的信道通过多个天线接收MIMO传输的电路。 MIMO传输包括多个流，每个流在相应的空间信道上传输并被配置为由多个用户站接收。 MIMO接收机还包括在20MHz带宽部分中的至少两个或更多个部分中同时累积信号信息的电路。 每个20MHz部分包括多个OFDM子载波。 MIMO接收机还包括使用接收波束成形技术解调至少一个蒸汽的电路。 以这种方式，可以接收多用户协议数据单元。
-
9.发明授权公开(公告)号：US07885178B2
公开(公告)日：2011-02-08
申请号：US10749902
申请日：2003-12-29
申请人： Alexander A. Maltsev , Ali S. Sadri , Sergey E. Sergeyev , Alexander N. Belonozhkin , Vadim S. Sergeyev
发明人： Alexander A. Maltsev , Ali S. Sadri , Sergey E. Sergeyev , Alexander N. Belonozhkin , Vadim S. Sergeyev
IPC分类号： H04J11/00
CPC分类号： H04L27/2649 , H04B1/005 , H04B1/0057 , H04B1/16 , H04B1/406 , H04B7/0413 , H04L27/2608 , H04L27/2653
摘要： A quasi-parallel receiver may simultaneously receive signals within several subchannels that comprise a wideband channel. The receiver includes a subchannel filter selection switch that provides a baseband signal to a selected one of a plurality of subchannel low-pass filters. A heterodyne frequency generator provides one of a plurality of heterodyne frequencies to convert an RF signal received within a selected subchannel to the baseband signal. The subchannel low-pass filters accumulate signal information from an associated one of a plurality of subchannels during a filter-input sampling interval. In some embodiments, individual analog-to-digital converters receive the accumulated signal outputs from an associated subchannel filter and generate digital signals for a subsequent Fourier transformation. In some embodiments, a normalized signal output may be provided to the analog-to-digital converters, allowing the use of lower resolution analog-to-digital converters. The analog-to-digital converters may have sampling rates based on the subchannel bandwidth.
摘要翻译： 准并行接收机可以同时在包括宽带信道的几个子信道内接收信号。 该接收机包括一个子信道滤波器选择开关，该选择开关向多个子信道低通滤波器中选定的一个提供基带信号。 外差频发生器提供多个外差频率中的一个，以将在所选择的子信道内接收的RF信号转换为基带信号。 在滤波器输入采样间隔期间，子信道低通滤波器累积来自多个子信道中相关联的一个的信号信息。 在一些实施例中，各个模数转换器从相关联的子信道滤波器接收累加的信号输出并产生用于后续傅里叶变换的数字信号。 在一些实施例中，归一化信号输出可以被提供给模数转换器，允许使用较低分辨率的模 - 数转换器。 模数转换器可以具有基于子信道带宽的采样率。
-
公开(公告)号：US07593347B2
公开(公告)日：2009-09-22
申请号：US10746265
申请日：2003-12-29
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： Briefly, a method and apparatus to exchange channel state information between two or more stations are provided. The channel state information may be used to adapt a power, a transmission rate and a modulation scheme of a transmitted signal. In some embodiments or the invention, a method comprises adapting a physical layer parameter based on exchanged channel information and exchanging over a channel the adapted physical layer parameter. In particular, in some embodiments of the invention, the physical layer parameter includes a bit and power loading parameter and the method comprises calculating a bit and power loading parameter during receiving a data packet; and applying the calculated bit and power loading parameter to a portion of an exchanged data packet.
摘要翻译： 简而言之，提供了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。 在一些实施例或本发明中，一种方法包括：基于所交换的信道信息来适应物理层参数，并且在信道上交换适配的物理层参数。 特别地，在本发明的一些实施例中，物理层参数包括位和功率加载参数，并且该方法包括在接收数据分组期间计算位和功率加载参数; 以及将所计算的比特和功率加载参数应用于所交换的数据分组的一部分。
-
-
-
-
-
-
-
-
-
搜索结果
21 条记录 (耗时 0.024 秒)
