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公开(公告)号：EP2335373B1
公开(公告)日：2018-02-28
申请号：EP09791814.8
申请日：2009-08-21
发明人： RAJKOTIA, Amol , HUANG, Yuheng , DURAL, Ozgur
IPC分类号： H04L5/00
CPC分类号： H04K3/224 , H04L1/0071 , H04L5/0007 , H04L5/0044 , H04L5/006
摘要： In embodiments, an adaptive tone erasure technique is applied to orthogonal frequency division multiplexing (OFDM) communications, such as ECMA-368 standard ultra-wideband (UWB) communications. A transmitter obtains jammed sub-carrier information and calculates an erasure mask. The jammed sub-carriers are nulled before transmitting to a receiver. In accordance with the erasure mask, bits falling on the jammed sub-carriers are replaced by erasure bits before interleaving, keeping the interleaver block size constant notwithstanding variations in the number of the jammed sub-carriers. The receiver also obtains the jammed sub-carrier information and the erasure mask. After the receiver deinterleaves the constant size blocks, it decodes the data without the erasure bits. The transmitter may detect the jammed sub-carriers itself, or obtain the information from the receiver. The receiver similarly may detect the jammed sub-carriers itself, or obtain the information from the transmitter.
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2.发明公开APPARATUS AND METHOD FOR IMPROVING CHANNEL FILTER SELECTIVITY AND PERFORMANCE USING VOLTAGE VARIABLE IMPEDANCE ELEMENTS 审中-公开装置和一种用于改善信道滤波器选择性和柱效使用电压可变阻抗元件
公开(公告)号：EP2371029A1
公开(公告)日：2011-10-05
申请号：EP09804363.1
申请日：2009-12-28
CPC分类号： H01P1/20 , H03H7/0153 , H03H2240/00
摘要： A controllable filter arrangement with a voltage controlled device that subjects a signal to a predetermined impedance as part of the filtering process when the voltage controlled device is in an active state. In an inactive state, the voltage controlled device may subject the signal to an impedance that prevents all frequencies of the signal from passing. This configuration may advantageously increase frequency selectivity and reduce insertion loss, size, cost, and tuning complexity when compared with conventional filter designs.
摘要翻译： 用电压控制装置的一个可控滤波器装置做主体的信号到预定的阻抗作为滤波处理时的电压控制装置是在ActiveState的的一部分。 在非激活状态时，电压受控装置可能使信号在阻抗确实防止了信号的所有频率从通过。 这种配置可以有利地提高频率选择性和降低插入损耗，尺寸，成本，和复杂性调谐当与常规滤波器设计相比。
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3.发明公开METHOD AND APPARATUS FOR PACKET DETECTION IN A WIRELESS COMMUNICATIONS SYSTEM 审中-公开在无线通信系统中的方法和装置用于分组检测
公开(公告)号：EP2090005A2
公开(公告)日：2009-08-19
申请号：EP07844654.9
申请日：2007-10-26
CPC分类号： H04L27/2656 , H04L5/0016 , H04L27/2613 , H04L27/2657 , H04L27/2665 , H04L27/2675
摘要： An apparatus (1600) for detecting an OFDM symbol encoded with a transmitted sequence including a filter (1604) having coefficients based on a simplified version of the transmitted sequence is disclosed. A computer program product having code and a wireless communications apparatus for performing the method are also described herein.
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公开(公告)号：EP1712015A1
公开(公告)日：2006-10-18
申请号：EP05712850.6
申请日：2005-02-04
摘要： Systems and techniques are disclosed relating to wireless communications. The systems and techniques involve wireless communications wherein a module or communications device is configured to enable a closed-loop power control in response to a detecting a wide-band interferer and disable the closed-loop power control in response to not detecting a wide-band interferer.
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公开(公告)号：EP2649854B1
公开(公告)日：2017-06-07
申请号：EP11808410.2
申请日：2011-12-08
发明人： KRISHNASWAMY, Dilip , RAJKOTIA, Amol , DAS, Soumya
CPC分类号： H04W72/1215 , H04W16/14
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公开(公告)号：EP2335373A2
公开(公告)日：2011-06-22
申请号：EP09791814.8
申请日：2009-08-21
发明人： RAJKOTIA, Amol , HUANG, Yuheng , DURAL, Ozgur
IPC分类号： H04L5/00
CPC分类号： H04K3/224 , H04L1/0071 , H04L5/0007 , H04L5/0044 , H04L5/006
摘要： In embodiments, an adaptive tone erasure technique is applied to orthogonal frequency division multiplexing (OFDM) communications, such as ECMA-368 standard ultra-wideband (UWB) communications. A transmitter obtains jammed sub-carrier information and calculates an erasure mask. The jammed sub-carriers are nulled before transmitting to a receiver. In accordance with the erasure mask, bits falling on the jammed sub-carriers are replaced by erasure bits before interleaving, keeping the interleaver block size constant notwithstanding variations in the number of the jammed sub-carriers. The receiver also obtains the jammed sub-carrier information and the erasure mask. After the receiver deinterleaves the constant size blocks, it decodes the data without the erasure bits. The transmitter may detect the jammed sub-carriers itself, or obtain the information from the receiver. The receiver similarly may detect the jammed sub-carriers itself, or obtain the information from the transmitter.
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7.发明公开
公开(公告)号：EP2036237A2
公开(公告)日：2009-03-18
申请号：EP07812509.3
申请日：2007-06-29
IPC分类号： H04L1/00
CPC分类号： H04L1/189 , H04L1/0002 , H04L1/0006 , H04L1/1607
摘要： Embodiments describe reducing interference in a wireless communication network, including an ad hoc network. According to an embodiment, a method for reducing interference includes receiving a data packet and determining a channel quality level of the received data packet. The method further includes calculating a number of groups to divide the data packet into based on the channel quality level and determining a slot position within each group. The positioning of an acknowledgment channel within each group can be optimized to reduce the amount of overhead channels or to provide time to decode a traffic channel.
摘要翻译： 实施例描述了减少包括自组织网络的无线通信网络中的干扰。 根据一个实施例，一种用于减少干扰的方法包括接收数据分组并且确定所接收的数据分组的信道质量等级。 该方法进一步包括基于信道质量等级计算将数据分组分成多个组并确定每个组内的时隙位置。 可以对每个组内的确认信道的定位进行优化，以减少开销信道的数量或提供解码业务信道的时间。
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8.发明公开
公开(公告)号：EP1730872A1
公开(公告)日：2006-12-13
申请号：EP05724564.9
申请日：2005-03-03
IPC分类号： H04L1/18
CPC分类号： H04L1/1621 , H04L1/0001 , H04L1/0083
摘要： Systems and techniques are disclosed relating to wireless communications, and more specifically, to various systems and techniques for early termination of low rate traffic in a wireless network. A physical layer packet (PLP) grouping factor K configures the PLP into K groups and an ACK/NACK is received on each group.
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公开(公告)号：EP2412184A1
公开(公告)日：2012-02-01
申请号：EP10712233.5
申请日：2010-03-26
IPC分类号： H04W28/06
CPC分类号： H04L1/1812 , H04L1/0059 , H04L1/0075 , H04L1/0079 , H04L1/0083 , H04W28/06
摘要： A method of transmitting a data frame is disclosed and may include transmitting a preamble, transmitting a physical layer convergence protocol (PLCP) header, and transmitting a plurality of MAC protocol data units (MPDUs). Each MPDU may be configured to reset a convolutional decoder state after each MPDU. The method may also include transmitting an MPDU aggregation header. The MPDU aggregation header may include a count of packed MPDUs, an array of offsets, an array of lengths, a frame check sequence (FCS) for the MPDU aggregation header, a group of tail bits, or a combination thereof. Further, an end of the MPDU aggregation header may be aligned to an interleaved symbol boundary.
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公开(公告)号：EP2394367A1
公开(公告)日：2011-12-14
申请号：EP10704274.9
申请日：2010-02-04
CPC分类号： H04B1/18 , H04B1/0053
摘要： An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on at least one of a geographic location, frequency spectrum information, and a status of a secondary internal radio. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth. A receiver includes an adjustable filter responsive to a control signal and controller configured to select a frequency response of the adjustable filter by generating the control signal based on a geographical location. In one aspect the geographical location indicates a region of operation of the receiver and the frequency response is selected in accordance with the region.
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