专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2006055018A1 METHODS AND APPARATUS FOR PARAMETRIC ESTIMATION IN A MULTIPLE ANTENNA COMMUNICATION SYSTEM 审中-公开
标题翻译：多天线通信系统中参数估计的方法与装置
公开(公告)号：WO2006055018A1
公开(公告)日：2006-05-26
申请号：PCT/US2005/003924
申请日：2005-01-27
申请人： AGERE SYSTEMS INC. , KRIEDTE, Kai Roland , MUJTABA, Syed, Aon , WANG, Xiaowen
发明人： KRIEDTE, Kai Roland , MUJTABA, Syed, Aon , WANG, Xiaowen
IPC分类号： H04B7/08 , H04L12/28 , H04L27/00
CPC分类号： H04L27/2613 , H04B7/0684 , H04L1/0046 , H04L1/0061
摘要： Methods and apparatus are disclosed for processing received data in a multiple input multiple output (MIMO) communication system. A multiple antenna receiver can distinguish a MIMO transmission from other transmissions based on the detection of a predefined symbol following a legacy portion of a preamble. A preamble comprises a legacy portion and an extended portion. The legacy portion is comprised of a first long preamble followed by a first signal field and may be processed by both multiple antenna receivers and legacy receivers. The extended portion comprises the predefined symbol following the first signal field from the legacy portion. If the predefined symbol is a second long preamble, a MIMO transmission is detected by performing a correlation on the preamble to detect the second long preamble. If the predefined symbol is a second long signal field, a MIMO transmission is detected by performing a cyclic redundancy check to detect the second long signal field.
摘要翻译：公开了用于处理多输入多输出（MIMO）通信系统中的接收数据的方法和装置。多天线接收机可以基于在前导码的遗留部分之后的预定符号的检测来区分MIMO传输与其他传输。前导码包括传统部分和扩展部分。遗留部分由第一长前导跟随第一信号场组成，并且可以由多个天线接收机和传统接收机两者来处理。扩展部分包括来自遗留部分的第一信号字段之后的预定符号。如果预定义符号是第二长前导码，则通过对前导码执行相关性来检测MIMO传输以检测第二长前导码。如果预定符号是第二长信号字段，则通过执行循环冗余校验来检测第二长信号字段来检测MIMO传输。

2. 发明申请

WO2006001898A1 METHOD AND APPARATUS FOR PREAMBLE TRAINING IN A MULTIPLE ANTENNA COMMUNICATION SYSTEM 审中-公开
标题翻译：在多个天线通信系统中预先训练的方法和装置
公开(公告)号：WO2006001898A1
公开(公告)日：2006-01-05
申请号：PCT/US2005/014407
申请日：2005-04-28
申请人： AGERE SYSTEMS INC. , MUJTABA, Syed, Aon , WANG, Xiaowen
发明人： MUJTABA, Syed, Aon , WANG, Xiaowen
IPC分类号： H04B7/06
CPC分类号： H04B7/0667 , H04B7/0684
摘要： Methods and apparatus are provided for communicating data in a multiple antenna communication system having N transmit antennas. According to one aspect of the invention, a header format includes a legacy preamble having at least one legacy long training field and an extended portion having at least N additional long training fields on each of the N transmit antennas. The N additional long training fields may be tone interleaved across the N transmit antennas and are used for MIMO channel estimation. The extended portion may include a short training field for power estimation. The short training field may be tone interleaved across the N transmit antennas and have an extended duration to support beam steering.
摘要翻译：提供了用于在具有N个发射天线的多天线通信系统中传送数据的方法和装置。根据本发明的一个方面，报头格式包括具有至少一个传统长训练场的传统前导码和在N个发射天线中的每一个上具有至少N个附加的长训练场的扩展部分。 N个附加的长训练场可以在N个发射天线之间进行音调交织，并用于MIMO信道估计。扩展部分可以包括用于功率估计的短训练场。短训练场可以在N个发射天线之间进行音调交织，并具有延长的持续时间以支持波束转向。

3. 发明申请

WO2006086493A1 METHOD AND APPARATUS FOR PREAMBLE TRAINING WITH SHORTENED LONG TRAINING FIELD IN A MULTIPLE ANTENNA COMMUNICATION SYSTEM 审中-公开
标题翻译：用于在多个天线通信系统中进行短距离训练的前期训练的方法和装置
公开(公告)号：WO2006086493A1
公开(公告)日：2006-08-17
申请号：PCT/US2006/004467
申请日：2006-02-08
申请人： AGERE SYSTEMS INC. , MUJTABA, Syed, Aon
发明人： MUJTABA, Syed, Aon
IPC分类号： H04L27/26
CPC分类号： H04B7/0684 , H04L27/261
摘要： Methods and apparatus are provided for communicating data in a multiple antenna communication system having N transmit antennas. According to one aspect of the invention, a disclosed header format includes a legacy preamble having at least one legacy long training field and an extended portion having at least N additional long training fields on each of the N transmit antennas, wherein one or more of said at least N additional long training fields are comprised of only one OFDM symbol. The extended portion optionally comprises one or more repeated OFDM symbols for frequency offset estimation. In one implementation, the extended portion comprises a first high throughput long training field comprised of two repeated OFDM symbols and N-I high throughput long training fields comprised of only one OFDM symbol. In another variation, the extended portion comprises N high throughput long training fields comprised of only one OFDM symbol.
摘要翻译：提供了用于在具有N个发射天线的多天线通信系统中传送数据的方法和装置。根据本发明的一个方面，公开的报头格式包括具有至少一个传统长训练场的传统前同步码和在N个发射天线中的每一个上具有至少N个附加长训练场的扩展部分，其中所述至少N个附加的长训练场仅由一个OFDM符号构成。扩展部分可选地包括用于频率偏移估计的一个或多个重复的OFDM符号。在一个实现中，扩展部分包括由两个重复的OFDM符号和仅由一个OFDM符号组成的N-1个高吞吐量长的训练场组成的第一高吞吐量长训练场。在另一变型中，扩展部分包括仅由一个OFDM符号组成的N个高吞吐量长的训练场。

4. 发明申请

WO2013022774A2 ADAPTIVE RANDOM ACCESS CHANNEL RETRANSMISSION 审中-公开
标题翻译：自适应随机访问信道重传
公开(公告)号：WO2013022774A2
公开(公告)日：2013-02-14
申请号：PCT/US2012/049578
申请日：2012-08-03
申请人： APPLE INC. , SONG, Kee-bong , WANG, Xiaowen , MUJTABA, Syed, Aon
发明人： SONG, Kee-bong , WANG, Xiaowen , MUJTABA, Syed, Aon
IPC分类号： H04W74/08
CPC分类号： H04W74/0833 , H04B17/318 , H04W52/146 , H04W52/241 , H04W52/367 , H04W52/48 , H04W52/50
摘要： A mobile wireless device adapts transmit power levels and number of retransmissions of a preamble sent to a wireless network. The mobile wireless device measures characteristics of a downlink signal received from the wireless network. The mobile wireless device transmits a series of preambles to the wireless network, each successive preamble having an increased power level, starting at a power level based on the measured received signal characteristics and on parameters received from the wireless network, up to a maximum transmit power level. When the transmit power level of the preamble exceeds the maximum transmit power level and when the measured downlink signal quality falls below a threshold, the mobile wireless device limits the number of preamble retransmission to less than an allowed maximum number of retransmissions. A minimum number of retransmissions is determined and adapted to higher values for larger measured values of downlink signal quality.
摘要翻译：移动无线设备适配发送到无线网络的前导码的发送功率电平和重传次数。移动无线设备测量从无线网络接收的下行链路信号的特征。移动无线设备向无线网络发送一系列前导码，每个连续的前导码具有增加的功率电平，从基于测量的接收信号特性的功率电平和从无线网络接收的参数开始，直到最大发射功率水平。当前导码的发射功率电平超过最大发射功率电平并且当测量的下行链路信号质量下降到阈值以下时，移动无线设备将前导码重传的数量限制为小于允许的最大重发次数。对于下行链路信号质量的较大测量值，确定最小重传次数并将其调整为较高值。

5. 发明申请

WO2013040151A1 ADAPTIVE RECEIVE DIVERSITY DURING DISCONTINUOUS RECEPTION IN A MOBILE WIRELESS DEVICE 审中-公开
标题翻译：在移动无线设备中不连续接收时的自适应接收多样性
公开(公告)号：WO2013040151A1
公开(公告)日：2013-03-21
申请号：PCT/US2012/055062
申请日：2012-09-13
申请人： APPLE INC. , MUJTABA, Syed, Aon , SONG, Kee-Bong , WANG, Xiaowen , KIM, Young, Jae , MAJJIGI, Vinay, R. , SEBENI, Johnson, O. , TRILLING, Romain , SHAMIM, Tahir , ANATHARAMAN, Karthik
发明人： MUJTABA, Syed, Aon , SONG, Kee-Bong , WANG, Xiaowen , KIM, Young, Jae , MAJJIGI, Vinay, R. , SEBENI, Johnson, O. , TRILLING, Romain , SHAMIM, Tahir , ANATHARAMAN, Karthik
IPC分类号： H04B7/08
CPC分类号： H04B7/082 , H04B7/0817 , H04B7/0871 , H04L43/0823
摘要： A mobile wireless device adapts receive diversity during discontinuous reception based on downlink signal quality, page indicators and page messages. When the downlink signal quality exceeds a pre-determined threshold, the mobile wireless device decodes a page indicator channel through an initial antenna, and otherwise, decodes a paging channel through the initial antenna without decoding the page indicator channel. The mobile wireless device switches to decoding the paging channel through an alternate antenna when a page indicator decodes as an erasure. When a paging message received through a single antenna decodes with an incorrect error checking code, the mobile wireless devices enables receive diversity through multiple antennas for subsequent decoding. The mobile wireless device switches between single antenna reception and multiple antenna reception based on tracking multiple consecutive error checking code failures and successes.
摘要翻译：移动无线设备基于下行链路信号质量，页面指示符和寻呼消息来适应不连续接收期间的接收分集。当下行链路信号质量超过预定阈值时，移动无线设备通过初始天线解码页面指示符信道，否则，通过初始天线解码寻呼信道，而不对页面指示符信道进行解码。当页面指示符被解码为擦除时，移动无线设备切换到通过替代天线解码寻呼信道。当通过单个天线接收的寻呼消息用不正确的错误校验码进行解码时，移动无线设备能够通过多个天线进行接收分集以进行后续解码。基于跟踪多个连续的错误检查代码故障和成功，移动无线设备在单天线接收和多天线接收之间切换。

6. 发明申请

WO2013022702A1 ELECTRONIC DEVICE WITH ANTENNA SWITCHING CAPABILITIES 审中-公开
标题翻译：具有天线切换能力的电子设备
公开(公告)号：WO2013022702A1
公开(公告)日：2013-02-14
申请号：PCT/US2012/049342
申请日：2012-08-02
申请人： APPLE INC. , MUJTABA, Syed, Aon , SONG, Kee-Bong
发明人： MUJTABA, Syed, Aon , SONG, Kee-Bong
IPC分类号： H04B7/08
CPC分类号： H04B7/0811 , H04B7/0808 , H04B7/0817
摘要： Electronic devices may be provided that contain wireless communications circuitry capable of supporting time division multiple access. The wireless communications circuitry may include radio-frequency transceiver circuitry coupled to multiple antennas. Signal strength measurements may be gathered using the antennas and corresponding signal strength difference measurements may be computed to reflect which of the antennas is exhibiting superior performance. The signal strength measurements may be made by measuring receive power levels in a beacon channel during idle time slots while toggling its antennas in and out of use or by detecting for the presence of non-silent traffic channel frames or silence indicator description frames and measuring corresponding receive power levels while toggling its antennas in and out of use. Beacon-channel-based measurements and non-silent-frame-based measurements may be used for electronic devices with receive diversity by simultaneously receiving frames of interest using each of its antennas and making corresponding measurements in parallel.
摘要翻译：可以提供包含能够支持时分多址的无线通信电路的电子设备。无线通信电路可以包括耦合到多个天线的射频收发器电路。可以使用天线来收集信号强度测量值，并且可以计算相应的信号强度差测量值，以反映哪些天线表现出优异的性能。信号强度测量可以通过在空闲时隙期间测量信标信道中的接收功率电平，同时切换其天线进出使用或通过检测非静默业务信道帧或静音指示符描述帧的存在并测量相应的在切换天线的同时切换和使用接收功率电平。基于信标通道的测量和非静音帧测量可以用于具有接收分集的电子设备，通过使用其每个天线同时接收感兴趣的帧并且并行地进行相应的测量。

7. 发明申请

WO2006029362A1 METHOD AND APPARATUS FOR COMMUNICATING ORTHOGONAL PILOT TONES IN A MULTIPLE ANTENNA COMMUNICATION SYSTEM 审中-公开
标题翻译：用于在多个天线通信系统中传播正交引导音调的方法和装置
公开(公告)号：WO2006029362A1
公开(公告)日：2006-03-16
申请号：PCT/US2005/032253
申请日：2005-09-09
申请人： AGERE SYSTEMS INC.
发明人： MUJTABA, Syed, Aon , WANG, Xiaowen
IPC分类号： H04L27/26 , H04B7/06
CPC分类号： H04B7/0669 , H04B7/0684 , H04B7/10 , H04L5/023 , H04L27/2602 , H04W48/08 , H04W48/16 , H04W84/12
摘要： Methods and apparatus are provided for communicating pseudo-orthogonal pilot tones in a multiple antenna communication system. Data is transmitted in a multiple antenna communication system having N transmit antennas by generating a number of pilot tones for each of the N transmit antennas, wherein the pilot tones for each of the N transmit antennas are pseudo-orthogonal with each other; and transmitting the data on each of the N transmit antennas. The pilot tones are generally embedded in the data. Data is received in a multiple antenna communication system having N transmit antennas by receiving the data on each of the N transmit antennas, wherein the data includes a number of pilot tones for each of the N transmit antennas, wherein the pilot tones for each of the N transmit antennas are pseudo-orthogonal with each other. The pilot tones can be orthogonal in the frequency domain, time domain, spatial domain, or all of them.
摘要翻译：提供了用于在多天线通信系统中传送伪正交导频音调的方法和装置。通过为N个发送天线中的每一个生成多个导频音，在具有N个发送天线的多天线通信系统中发送数据，其中N个发射天线中的每一个的导频音调彼此伪正交; 以及在所述N个发射天线中的每一个上发送所述数据。导频音通常嵌入在数据中。在具有N个发射天线的多天线通信系统中，通过接收N个发射天线中的每一个上的数据来接收数据，其中数据包括用于N个发射天线中的每一个的导频音调，其中， N个发射天线彼此伪正交。导频音可以在频域，时域，空间域或全部中正交。

8. 发明申请

WO2006029313A1 METHOD AND APPARATUS FOR IMPROVED EFFICIENCY IN AN EXTENDED MULTIPLE ANTENNA COMMUNICATION SYSTEM 审中-公开
标题翻译：在延伸的多天线通信系统中提高效率的方法和装置
公开(公告)号：WO2006029313A1
公开(公告)日：2006-03-16
申请号：PCT/US2005/032152
申请日：2005-09-06
申请人： AGERE SYSTEMS INC.
发明人： MUJTABA, Syed, Aon , WANG, Xiaowen
IPC分类号： H04L27/26 , H04B7/06 , H04L5/06
CPC分类号： H04L25/0206 , H04B7/0613 , H04B7/12 , H04L5/0007 , H04L5/0048 , H04L27/2613 , H04L27/2628
摘要： Methods and apparatus are provided for improved efficiency in an extended multiple antenna communication system. A multiplier is employed on the number of points in the FFT that is greater than the multiplier on the frequency (bandwidth) of the legacy 802.11 a/g system. In one exemplary implementation, a 256 point FFT is employed in 40 MHz (with a 4N multiplier on the number of possible tones and a 2N multiplier on the frequency): While the efficiency for the OFDM symbol is improved, additional overhead is required in the preamble training (the length of the preamble is proportional to the number of tones in the FFT). Thus, a number of preamble constructs are provided that couple the improved efficiency with shorter preambles. In addition, an improved tone design provides additional efficiency gains.
摘要翻译：提供了用于在扩展的多天线通信系统中提高效率的方法和装置。在FFT中的点数大于遗留802.11a / g系统的频率（带宽）上的乘数的乘数被采用。在一个示例性实现中，在40MHz（在可能音调的数量上为4N乘法器和频率上的2N乘法器）中采用256点FFT：虽然提高了OFDM符号的效率，但是需要额外的开销前导码训练（前导码的长度与FFT中的音调数成正比）。因此，提供了许多前导码结构，其将改进的效率与较短的前导码相结合。此外，改进的音调设计提供了额外的效率增益。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式