公开(公告)号：US20090296679A1

公开(公告)日：2009-12-03

申请号：US12299301

申请日：2007-02-08

申请人： Ahmet Bastug ,  Pierre Demaj

发明人： Ahmet Bastug ,  Pierre Demaj

IPC分类号： H04B7/216 ,  H04B1/707

CPC分类号： H04J13/20 ,  H04B1/7097 ,  H04B2201/70701 ,  H04L25/03063 ,  H04L2025/03509

摘要： A symbol-level adaptation method to adapt at least one coefficient of an equalizer, wherein the method includes a) determining if there exists a shortened pilot channelization code which has a spreading factor shorter than the spreading factor of a full pilot channelization code and which is, at the same time, still orthogonal to any other simultaneously active channelization codes, and, b) if there exists a shortened pilot channelization code, despreading the pilot channel using the shortened pilot channelization code to obtain a pilot symbol estimation, and c) adapting the value of the equalizer coefficient according to the error between the pilot symbol estimation obtained from step b) and a corresponding expected pilot symbol.

摘要翻译： 一种用于适应均衡器的至少一个系数的符号级适配方法，其中所述方法包括：a）确定是否存在具有比完全导频信道化码的扩展因子更短的扩频因子的缩短的导频信道化码， 同时仍然与任何其他同时有效的信道化码正交，以及b）如果存在缩短的导频信道化码，则使用缩短的导频信道化码解扩导频信道以获得导频符号估计，以及c）适配 根据从步骤b）获得的导频符号估计与相应的预期导频符号之间的误差的均衡器系数的值。

公开(公告)号：US08194726B2

公开(公告)日：2012-06-05

申请号：US12278643

申请日：2007-02-06

申请人： Andrea Ancora ,  Ahmet Bastug

发明人： Andrea Ancora ,  Ahmet Bastug

IPC分类号： H03H7/40

CPC分类号： H04L25/03038 ,  H04L25/0212 ,  H04L25/0228 ,  H04L25/025 ,  H04L2025/03477

摘要： A filter weight estimation device (D), for an equaliser of a communication receiver, comprises i) a tap delay line connected to N branches each comprising a descrambler (DS1-DSN) and a despreader (DE1-DEN), for despreading received signals, corresponding to one or more available multiplexed channels associated with different channelization codes, with a reference code equal to the sum of all the channelization codes associated to the available multiplexed channels, Ë) an adaptive filter (AF) comprising N input filter taps respectively connected to the N branches and a regression input and arranged to estimate the sum of the symbols outputted by the despreaders (DE1-DEN) and associated to each available channel, said symbol sum constituting a pseudo-symbol estimate defining a reference symbol estimate (rs), and to implement a mechanism of a LMS type to deliver a chosen number of filter weights (fi), iË) a quantiser (SM) arranged to quantise the reference symbol estimate (rs) to estimate a desired reference symbol (d), and iv) an error computation module (AM) for subtracting the reference symbol estimate (rs) from the desired reference symbol (d) to output an error signal (e) feeding the regression input.

摘要翻译： 一种用于通信接收机的均衡器的滤波器权重估计装置（D），包括：i）连接到N个分支的抽头延迟线，每个分支包括解扰器（DS1-DSN）和解扩器（DE1-DEN），用于解扩接收信号 对应于与不同信道化码相关联的一个或多个可用多路复用信道，参考码等于与可用多路复用信道相关联的所有信道化码的总和，Ë）包括分别连接的N个输入滤波器抽头的自适应滤波器（AF） 回归输入，并且被设置为估计解扩器（DE1-DEN）输出并与每个可用信道相关联的符号的和，所述符号和构成定义参考符号估计（rs）的伪符号估计， 并且实现LMS类型的机制以递送所选数量的滤波器权重（fi），i）设置为量化参考符号估计（rs）的量化器（SM）以估计 （d），以及iv）用于从期望的参考符号（d）中减去参考符号估计（rs）的误差计算模块（AM），以输出馈送回归输入的误差信号（e）。

公开(公告)号：US20090225814A1

公开(公告)日：2009-09-10

申请号：US12097672

申请日：2006-12-12

申请人： Ahmet Bastug ,  Stefania Sesia

发明人： Ahmet Bastug ,  Stefania Sesia

IPC分类号： H04B1/707

CPC分类号： H04L25/03057 ,  H04B1/7105 ,  H04J13/004 ,  H04L2025/0335 ,  H04L2025/0349

摘要： The present invention relates to receiver apparatuses and methods of controlling weight adaptation in a receiver of a code multiplex telecommunications system with orthogonal spreading codes, wherein received discrete time signal samples are chip-level filtered by using a first equalising step. Additionally, the received discrete time signal samples are delayed by a time period corresponding to a data symbol and used in a second equalising step. Symbol estimates obtained from the first equalising step are non-linearly filtered and used as a desired response for the second equalising step in the following symbol period, wherein equaliser weights adapted in the second equalising step are used for the first equalising step. Alternatively, the second equalising step may be dispensed with and weight adaptation may be incorporated in a single equalising step. As an additional or alternative option, a hybrid equaliser architecture may be provided, where the above two-step equalisation is used during an active phase where a channel is allocated, while another weight updating scheme is used during an inactive phase where no channel is assigned. Thereby, detrimental effects of interference power can be reduced at low increase in complexity.

摘要翻译： 本发明涉及在具有正交扩展码的码多路复用电信系统的接收机中控制权重适应的接收机装置和方法，其中通过使用第一均衡步骤对接收的离散时间信号样本进行码片级滤波。 另外，接收的离散时间信号样本被延迟与数据符号对应的时间段，并在第二均衡步骤中使用。 从第一均衡步骤获得的符号估计被非线性滤波，并用作随后符号周期中的第二均衡步骤的期望响应，其中在第二均衡步骤中适应的均衡器权重用于第一均衡步骤。 或者，可以省略第二均衡步骤，并且可以在单个均衡步骤中并入权重适应。 作为附加或替代选项，可以提供混合均衡器架构，其中在分配信道的活动阶段期间使用上述两步均衡，而在不分配信道的非活动阶段期间使用另一权重更新方案 。 因此，可以在复杂性的低增加的情况下减少干扰功率的有害影响。

公开(公告)号：US08462756B2

公开(公告)日：2013-06-11

申请号：US12162818

申请日：2007-01-31

申请人： Ahmet Bastug ,  Pierre Demaj

发明人： Ahmet Bastug ,  Pierre Demaj

IPC分类号： H04B7/216

CPC分类号： H04L25/03038 ,  H04B1/7097 ,  H04J13/0044 ,  H04L2025/0377

摘要： A symbol-level adaptation method to adapt at least one coefficient of an equalizer, the method comprising the steps of: a) executing an adaptive algorithm that calculates the value of the equalizer coefficient, the adaptive algorithm having a tunable parameter that determines how close the calculated coefficient value is to the optimal solution, b) modifying the value of the equalizer coefficient according to the calculated coefficient value at an intermediate instant tΔ strictly between two consecutive instants tA and tB, instants tA and tB corresponding to the beginning and the end of a pilot symbol period, respectively, and c) adjusting the value of the tunable parameter according to a number Δ representing the number of chips yet to be received before instant tB or already received since instant tA.

摘要翻译： 一种用于适应均衡器的至少一个系数的符号级适配方法，所述方法包括以下步骤：a）执行计算所述均衡器系数的值的自适应算法，所述自适应算法具有可调参数，所述可调参数确定所述均衡器 计算的系数值为最优解，b）根据在两个连续时刻tA和tB之间的中间时刻tDelta处的计算出的系数值修改均衡器系数的值，对应于开始和结束的时刻tA和tB 导频符号周期，以及c）根据代表在时刻tB之前尚未接收的芯片数目的数量Delta调整可调谐参数的值，或者从时刻tA起已经接收到的可调参数的值。

公开(公告)号：US20100284493A1

公开(公告)日：2010-11-11

申请号：US12596364

申请日：2008-04-15

申请人： Calogero Bona ,  Ahmet Bastug ,  Andrea Ancora

发明人： Calogero Bona ,  Ahmet Bastug ,  Andrea Ancora

IPC分类号： H04L27/00

CPC分类号： H04L25/0224 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0244 ,  H04L27/2647

摘要： A method for deriving a channel transfer function from an Orthogonal Frequency-Division Multiplex (OFDM) signal received over a channel and having unmodulated sub-carriers and sub-carriers modulated with symbols, includes the steps of sampling the received OFDM signal at a sampling rate greater than the bandwidth of the OFDM signal, deriving from the sampled OFDM signal a set of time domain coefficients representative of the channel impulse response, and deriving from a subset of the set of time domain coefficients a channel transfer function in the frequency domain.

摘要翻译： 一种从通过信道接收并且具有未被调制的子载波和用码元调制的子载波的正交频分复用（OFDM）信号导出信道传递函数的方法包括以下采样速率对接收到的OFDM信号进行采样的步骤 大于OFDM信号的带宽，从采样的OFDM信号中导出代表信道脉冲响应的一组时域系数，以及从频域系数集合的子集中导出频域中的信道传递函数。

公开(公告)号：US08208457B2

公开(公告)日：2012-06-26

申请号：US12299301

申请日：2007-02-08

申请人： Ahmet Bastug ,  Pierre Demaj

发明人： Ahmet Bastug ,  Pierre Demaj

IPC分类号： H04B7/216 ,  H04W4/00

CPC分类号： H04J13/20 ,  H04B1/7097 ,  H04B2201/70701 ,  H04L25/03063 ,  H04L2025/03509

摘要： A symbol-level adaptation method to adapt at least one coefficient of an equalizer, wherein the method comprises the steps of: a) determining (144) if there exists a shortened pilot channelization code which has a spreading factor shorter than the spreading factor of a full pilot channelization code and which is, at the same time, still orthogonal to any other simultaneously active channelization codes, and, b) if there exists a shortened pilot channelization code, despreading (162) the pilot channel using the shortened pilot channelization code to obtain a pilot symbol estimation, and c) adapting (168) the value of the equalizer coefficient according to the error between the pilot symbol estimation obtained from step b) and a corresponding expected pilot symbol.

摘要翻译： 一种适应均衡器的至少一个系数的符号级自适应方法，其中所述方法包括以下步骤：a）确定（144）是否存在一个缩短的导频信道化码，其扩频因子小于一个扩展因子 全导频信道化码，并且同时仍然与任何其他同时有效的信道化码正交，以及b）如果存在缩短的导频信道化码，则使用缩短的导频信道化码将该导频信道解扩（162） 获得导频符号估计，以及c）根据从步骤b）获得的导频符号估计与相应的预期导频符号之间的误差来适配（168）均衡器系数的值。

公开(公告)号：US20090323874A1

公开(公告)日：2009-12-31

申请号：US12296891

申请日：2007-04-11

申请人： Ahmet Bastug ,  Giuseppe Montalbano

发明人： Ahmet Bastug ,  Giuseppe Montalbano

IPC分类号： H04B1/10

CPC分类号： H04L25/0226 ,  H04L25/0228

摘要： The present invention relates to a receiver apparatus and method of channel estimation in a telecommunication system which provides at least two pilot sequences, and to a computer program product. Channel estimation is achieved by estimating channel taps separately for each of the at least two pilot sequences in every transmission block, and for applying estimated channel taps obtained from the estimation to at least one of a temporal and spatial filtering or combining operation to refine the channel estimate. Accordingly, temporal correlations and cross-correlations of the at least two pilot sequences are exploited without requiring knowledge of path delays and beamforming parameters.

摘要翻译： 本发明涉及在提供至少两个导频序列的电信系统中的信道估计的接收机装置和方法以及计算机程序产品。 通过对每个传输块中的至少两个导频序列中的每一个单独地估计信道抽头，并且将从估计获得的估计信道抽头应用于时间和空间滤波或组合操作中的至少一个以优化信道来实现信道估计 估计。 因此，利用了至少两个导频序列的时间相关性和互相关，而不需要知道路径延迟和波束成形参数。

公开(公告)号：US08295327B2

公开(公告)日：2012-10-23

申请号：US12300986

申请日：2007-05-10

申请人： Ahmet Bastug ,  Eric Alliot

发明人： Ahmet Bastug ,  Eric Alliot

IPC分类号： H04L1/20 ,  H04B1/707

CPC分类号： H04B1/1027 ,  H04B1/7101 ,  H04L1/20

摘要： The invention is directed towards a method and apparatus for estimating a noise variance in a receiver of a code multiplex telecommunications system with orthogonal spreading codes, wherein respective real and imaginary parts of a sum and a difference of two estimated symbols having substantially same amplitudes are determined, and then respective minimum energy components of the determined real and imaginary parts of the sum and difference are determined. The respective minimum energy components are finally combined to obtain the noise variance. Thereby, noise variance can be estimated simply based on addition and comparison operations, which reduces complexity and processing load.

摘要翻译： 本发明涉及一种用于利用正交扩展码来估计代码多路复用电信系统的接收机中的噪声方差的方法和装置，其中确定具有基本上相同振幅的两个估计符号的和和差的相应实部和虚部 ，然后确定求和和差的确定的实部和虚部的各自的最小能量分量。 最终组合相应的最小能量分量以获得噪声方差。 因此，可以简单地基于加法和比较操作来估计噪声方差，这降低了复杂度和处理负担。

公开(公告)号：US08259854B2

公开(公告)日：2012-09-04

申请号：US12296891

申请日：2007-04-11

申请人： Ahmet Bastug ,  Giuseppe Montalbano

发明人： Ahmet Bastug ,  Giuseppe Montalbano

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L25/0226 ,  H04L25/0228

摘要： The present invention relates to a receiver apparatus and method of channel estimation in a telecommunication system which provides at least two pilot sequences, and to a computer program product. Channel estimation is achieved by estimating channel taps separately for each of the at least two pilot sequences in every transmission block, and for applying estimated channel taps obtained from the estimation to at least one of a temporal and spatial filtering or combining operation to refine the channel estimate. Accordingly, temporal correlations and cross-correlations of the at least two pilot sequences are exploited without requiring knowledge of path delays and beamforming parameters.

摘要翻译： 本发明涉及在提供至少两个导频序列的电信系统中的信道估计的接收机装置和方法以及计算机程序产品。 通过对每个传输块中的至少两个导频序列中的每一个单独地估计信道抽头，并且将从估计获得的估计信道抽头应用于时间和空间滤波或组合操作中的至少一个以优化信道来实现信道估计 估计。 因此，利用了至少两个导频序列的时间相关性和互相关，而不需要知道路径延迟和波束成形参数。

公开(公告)号：US20100027589A1

公开(公告)日：2010-02-04

申请号：US12300986

申请日：2007-05-10

申请人： Ahmet Bastug ,  Eric Alliot

发明人： Ahmet Bastug ,  Eric Alliot

IPC分类号： H04B1/707

CPC分类号： H04B1/1027 ,  H04B1/7101 ,  H04L1/20

摘要： The invention is directed towards a method and apparatus for estimating a noise variance in a receiver of a code multiplex telecommunications system with orthogonal spreading codes, wherein respective real and imaginary parts of a sum and a difference of two estimated symbols having substantially same amplitudes are determined, and then respective minimum energy components of the determined real and imaginary parts of the sum and difference are determined. The respective minimum energy components are finally combined to obtain the noise variance. Thereby, noise variance can be estimated simply based on addition and comparison operations, which reduces complexity and processing load.

摘要翻译： 本发明涉及一种用于利用正交扩展码来估计代码多路复用电信系统的接收机中的噪声方差的方法和装置，其中确定具有基本上相同振幅的两个估计符号的和和差的相应实部和虚部 ，然后确定求和和差的确定的实部和虚部的各自的最小能量分量。 最终组合相应的最小能量分量以获得噪声方差。 因此，可以简单地基于加法和比较操作来估计噪声方差，这降低了复杂度和处理负担。