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    • 12. 发明申请
    • METHOD AND APPARATUS USING SOUNDING PPDUs TO PROVIDE RANGE EXTENSION TO IEEE 802.11n SIGNALS
    • 使用声音PPDU向IEEE 802.11n信号提供范围扩展的方法和装置
    • US20100111220A1
    • 2010-05-06
    • US12615860
    • 2009-11-10
    • Stephanie Rouquette-LeveilMarc Bernard De CourvillePatrick Labbe
    • Stephanie Rouquette-LeveilMarc Bernard De CourvillePatrick Labbe
    • H04B7/02H04L27/00
    • H04L1/06H04B7/0671H04L1/0618H04L25/0204H04L25/022H04L25/0228
    • A wireless transmitter includes a stream parser for generating a plurality of spatial streams from a digital signal and a space time block coder (STBC) for mapping each of the spatial streams to a plurality of space-time streams that each include data and a preamble for estimating a channel transfer function. The transmitter also includes a spatial mapper for spatially expanding each of the space-time streams by applying a spatial expansion matrix to data and to first training symbols used in the preamble to probe a channel experienced by the data and by applying an extension matrix to second training symbols used in the preamble to probe at least one additional dimension of the channel to enable use of beamforming to achieve range extension The spatial expansion matrix and the extension matrix form an overall matrix that has at least two orthogonal columns with different norms. The wireless transmitter also includes an analog front end for modulating the spatially expanded space-time streams onto a wireless carrier.
    • 无线发射机包括用于从数字信号产生多个空间流的流分析器和用于将每个空间流映射到多个空时流的空时分组编码器(STBC),每个空时流包括数据和前导码, 估计信道传递函数。 发射机还包括空间映射器,用于通过将空间扩展矩阵应用于数据和在前导码中使用的第一训练符号来空间扩展每个空时流,以探测数据所经历的信道,并通过对第二个应用扩展矩阵 在前导码中使用的训练符号以探测信道的至少一个附加维度,以使得能够使用波束成形来实现范围扩展空间扩展矩阵和扩展矩阵形成具有至少两个具有不同规范的正交列的整体矩阵。 无线发射机还包括用于将空间扩展的空时流调制到无线载波上的模拟前端。
    • 15. 发明申请
    • Method and receiver for receiving an ultra wide band signal
    • 用于接收超宽带信号的方法和接收机
    • US20060045172A1
    • 2006-03-02
    • US11217773
    • 2005-09-01
    • Veronique Buzenac-SettineriDavid BatemanMarc Bernard De CourvilleMohamed KamounPierre Duhamel
    • Veronique Buzenac-SettineriDavid BatemanMarc Bernard De CourvilleMohamed KamounPierre Duhamel
    • H04B1/707H04B1/69
    • H04B1/69H04B1/709
    • A receiver (103) for receiving an Ultra Wide Band (UWB) signal comprises a receiver front end (105) coupled to symbol point correlators (107). The symbol point correlators (107) comprise a first plurality of correlators which generates correlated signal values around a first symbol decision point of a first symbol by correlating the received UWB signal with a local replica. The first plurality of correlators are time offset with respect to each other to generate first time offset correlated signal values. The time offsets are typically significantly less than the timing jitter of transmit and receive oscillators. The symbol point correlators (107) are coupled to a joint estimator (109) which determines a symbol value of the first symbol in response to the first time offset correlated signal values by joint detection of the symbol value and a time offset of the UWB signal. The invention may effectively reduce time jitter noise to a value determined by the relative time offset between the correlators.
    • 用于接收超宽带(UWB)信号的接收机(103)包括耦合到符号点相关器(107)的接收机前端(105)。 符号点相关器(107)包括第一多个相关器,其通过将接收的UWB信号与本地副本相关联来产生围绕第一符号的第一符号判定点的相关信号值。 第一多个相关器相对于彼此是时间偏移量,以产生第一时间偏移相关信号值。 时间偏移通常明显小于发射和接收振荡器的定时抖动。 符号点相关器(107)耦合到联合估计器(109),联合估计器(109)通过联合检测符号值和UWB信号的时间偏移来响应于第一时间偏移相关信号值确定第一符号的符号值 。 本发明可以有效地将时间抖动噪声降低到由相关器之间的相对时间偏移确定的值。
    • 16. 发明授权
    • OFDM channel estimation and tracking for multiple transmit antennas
    • 用于多个发射天线的OFDM信道估计和跟踪
    • US07539259B2
    • 2009-05-26
    • US10566932
    • 2004-07-28
    • Alexandre Ribeiro DiasMarc Bernard De CourvilleMarkus D. Muck
    • Alexandre Ribeiro DiasMarc Bernard De CourvilleMarkus D. Muck
    • H04B7/02H04L1/02
    • H04L25/023H04B7/04H04L1/0618H04L27/2605H04L27/2647
    • Multiple Transmit Multiple Receive Orthogonal Frequency Division Multiplexing (‘OFDM’) comprising generating bit streams and corresponding sets of N frequency domain carrier amplitudes ({tilde over (s)}(kN+j), 0≦j≦N−1) modulated as OFDM symbols subsequently to be transmitted from a transmitter, where k is the OFDM symbol number and j indicates the corresponding OFDM carrier number. Affix information is inserted at the transmitter into guard intervals between consecutive time domain OFDM symbols and are used at the receiver to estimate the Channel Impulse Response (Hlm) of the transmission channels, the estimated Channel Impulse Response (Ĥlm) being used to demodulate the bit streams in the signals received at the receiver. The affix information is known to the receiver, as well as to the transmitter, and is mathematically equivalent to a vector (cD) that is common to the time domain OFDM symbols multiplied by at least first weighting factors (αk) that are different for one time domain OFDM symbol (k) than for another and second weighting factors (wi(k)) that enable one of the transmit antenna means (i) to be distinguished from another.
    • 包括生成比特流和N个频域载波幅度的相应集合({tilde over(s)}(kN + j),0≤j≤N-1的多发送多个接收正交频分复用('OFDM' 调制为随后从发射机发送的OFDM符号,其中k是OFDM符号数,j表示对应的OFDM载波号。 附件信息在发射机处插入连续时域OFDM符号之间的保护间隔,并在接收机处用于估计传输信道的信道脉冲响应(Hlm),所估计的信道脉冲响应(Hlm)用于解调比特 在接收机接收的信号中流。 接收机以及发射机都知道贴缀信息,并且在数学上等价于与时域OFDM符号相乘的向量(cD),该矢量乘以至少第一加权因子(alphak),其不同于一个 时域OFDM符号(k)而不是使得能够将发射天线装置(i)中的一个区别于另一个的另一和第二加权因子(wi(k))。
    • 17. 发明申请
    • Ofdm Channel Estimation and Tracking for Multiple Transmit Antennas
    • Ofdm信道估计和跟踪多发射天线
    • US20080043857A1
    • 2008-02-21
    • US10566932
    • 2004-07-28
    • Alexandre Ribeiro DiasMarc Bernard De CourvilleMarkus D. Muck
    • Alexandre Ribeiro DiasMarc Bernard De CourvilleMarkus D. Muck
    • H04L23/02
    • H04L25/023H04B7/04H04L1/0618H04L27/2605H04L27/2647
    • Multiple Transmit Multiple Receive Orthogonal Frequency Division Multiplexing (‘OFDM’) comprising generating bit streams and corresponding sets of N frequency domain carrier amplitudes ({tilde over (s)}(kN+j), 0≦j≦N−1) modulated as OFDM symbols subsequently to be transmitted from a transmitter, where k is the OFDM symbol number and j indicates the corresponding OFDM carrier number. Affix information is inserted at the transmitter into guard intervals between consecutive time domain OFDM symbols and are used at the receiver to estimate the Channel Impulse Response (Hlm) of the transmission channels, the estimated Channel Impulse Response (Ĥlm) being used to demodulate the bit streams in the signals received at the receiver. The affix information is known to the receiver, as well as to the transmitter, and is mathematically equivalent to a vector (cD) that is common to the time domain OFDM symbols multiplied by at least first weighting factors (αk) that are different for one time domain OFDM symbol (k) than for another and second weighting factors (wi(k)) that enable one of the transmit antenna means (i) to be distinguished from another.
    • 包括生成比特流和N个频域载波幅度(s(kN + j),0 <= j <= N-1)的对应集合的多发送多个接收正交频分复用(OFDM) 从发射机发射,其中k是OFDM符号号,j表示对应的OFDM载波号。 附件信息在发射机处插入连续时域OFDM符号之间的保护间隔,并在接收机处用于估计传输信道的信道脉冲响应(H L1m),估计的信道脉冲响应( 用于解调在接收机处接收的信号中的比特流。 附件信息对于接收机以及发射机是已知的,并且在数学上等同于时域OFDM符号与至少第一加权因子相乘的向量(c D D D N) 对于一个时域OFDM符号(k)而言不同于对于另一个和第二加权因子(w> i(k))的第一加权因子(k)的传输(αk) 天线意味着(i)与另一个不同。