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1. 发明申请

US20070073796A1 METHOD AND APPARATUS FOR FFT COMPUTATION 审中-公开
标题翻译： FFT计算的方法和装置
公开(公告)号：US20070073796A1
公开(公告)日：2007-03-29
申请号：US11532656
申请日：2006-09-18
申请人： Lisa Meilhac , Alain Chiodini
发明人： Lisa Meilhac , Alain Chiodini
IPC分类号： G06F17/14
CPC分类号： G06F17/142
摘要： The invention relates to a method and apparatus for computing a 2N-point Fourier transform, direct or inverse, out of a 2N-sample input sequence. According to the invention, a signal processing method and apparatus is provided that makes use of an existing N-point FFT processor as well as other blocks such as a CORDIC or a filter to compute the 2N-point FFT.
摘要翻译：本发明涉及一种用于计算2N样本输入序列中直接或反向的2N点傅里叶变换的方法和装置。根据本发明，提供一种使用现有的N点FFT处理器以及诸如CORDIC或滤波器的其它块来计算2N点FFT的信号处理方法和装置。

2. 发明申请

US20140233555A1 Method for Managing Access to a Shared Communication Medium 有权
标题翻译：用于管理对共享通信媒体的访问的方法
公开(公告)号：US20140233555A1
公开(公告)日：2014-08-21
申请号：US14236394
申请日：2012-08-01
申请人： Alain Chiodini
发明人： Alain Chiodini
IPC分类号： H04W74/08
CPC分类号： H04W74/0816
摘要： The methods for managing access to a communication medium shared by a plurality of radio communication devices. The method of accessing a radio communication medium shared between a plurality of communication terminals. The method is based on a variant of the CSMA/CD access protocol. The method is based on monitoring of the medium and the emission of a token to request permission to emit. The terminals that receive this token then emit an acknowledgement intended to signal that the medium can be used, or a collision message if they receive a plurality of tokens simultaneously. In the latter case, the emitter retries its attempt to use the medium later on.
摘要翻译：用于管理对由多个无线电通信设备共享的通信介质的访问的方法。访问在多个通信终端之间共享的无线电通信介质的方法。该方法基于CSMA / CD访问协议的变体。该方法基于对介质的监视和令牌的发射以请求发射的许可。接收该令牌的终端然后发出用于指示可以使用介质的确认，或者如果它们同时接收到多个令牌则发出冲突消息。在后一种情况下，发射器重试尝试以后使用介质。

3. 发明授权

US07369626B1 Efficient subcarrier equalization to enhance receiver performance 有权
标题翻译：高效的副载波均衡以增强接收机性能
公开(公告)号：US07369626B1
公开(公告)日：2008-05-06
申请号：US10782351
申请日：2004-02-18
申请人： Alain Chiodini , Thomas Edward Pare, Jr.
发明人： Alain Chiodini , Thomas Edward Pare, Jr.
IPC分类号： H03K9/00 , H04B1/38 , H04L5/16 , H03H7/30
CPC分类号： H04L25/03159 , H04L25/03343 , H04L2025/03414 , H04L2025/03522
摘要： A modem system for receiving and transmitting signals having a frequency domain equalizer (FEQ) block being responsive to a frequency channel response for processing the same to generate one or more initial FEQ coefficients (FEQ1), the modem system is responsive to an input signal for processing the same to generate frequency channel response, the input signal being generated from a transmitted signal, FEQ block using FEQ1 to generate an equalized Signal, modem system demodulating equalized Signal to generate a demodulated Signal symbol, in accordance with an embodiment of the present invention.
摘要翻译：一种调制解调器系统，用于接收和发送具有频域均衡器（FEQ）块的信号，所述频域均衡器（FEQ）块响应于频率响应来处理该频率响应以产生一个或多个初始FEQ系数（FEQ 1），所述调制解调器系统响应于输入信号为了处理它以产生频道信号响应，根据传输信号产生的输入信号，使用FEQ1的FEQ块，以产生均衡的信号，调制解调器系统解调均衡信号以产生解调的信号符号，根据本发明。

4. 发明申请

US20060198473A1 Apparatus and method for detecting preambles according to IEEE 802.11B wireless LAN standard 审中-公开
标题翻译：根据IEEE 802.11B无线局域网标准检测前导码的装置和方法
公开(公告)号：US20060198473A1
公开(公告)日：2006-09-07
申请号：US11347899
申请日：2006-02-06
申请人： Alain Chiodini
发明人： Alain Chiodini
IPC分类号： H04L27/06
CPC分类号： H04B1/7095 , H04B1/7075 , H04B2201/70707
摘要： The present invention relates to the field of wireless communication systems and in particular to an apparatus and a method for short preamble detection within the framework of the 802.11b standard. The present invention can be easily implemented in either the radio part (preferred embodiment) or the baseband part (general case) of a wireless LAN receiver to provide short preamble detection. The inventive method and apparatus utilize a couple of low-complexity cross-correlators respectively fed by an oversampled I and Q signal to detect the presence of a short preamble. A decision on the presence of the short preamble is made by comparing a figure of merit formed by adding the magnitude of the largest peaks respectively yielded by both cross-correlators to a preset threshold. The proposed innovation offers a significant advantage over conventional approaches in terms of gate count and power consumption.
摘要翻译：无线通信系统领域本发明涉及无线通信系统的领域，特别涉及一种在802.11b标准的框架内进行短前导码检测的装置和方法。本发明可以容易地实现在无线局域网接收机的无线部分（优选实施例）或基带部分（一般情况）中，以提供短前导码检测。本发明的方法和装置利用分别由过采样I和Q信号馈送的一组低复杂度互相关器来检测短前导码的存在。通过将由两个交叉相关器产生的最大峰值的幅度相加而形成的品质因数与预设阈值进行比较，来做出关于短前同步码存在的决定。所提出的创新在门数和功耗方面比传统方法具有显着的优势。

5. 发明授权

US5949794A Time symmetrical control signal, and a receiver and transmission system employing the same 失效
标题翻译：时间对称控制信号，以及采用该控制信号的接收机和传输系统
公开(公告)号：US5949794A
公开(公告)日：1999-09-07
申请号：US492613
申请日：1995-06-20
申请人： Alain Chiodini
发明人： Alain Chiodini
IPC分类号： H04B1/7087 , H04B7/005 , H04B7/15 , H04B7/212 , H04B7/216 , H04J13/00 , H04L7/00 , H04J3/06 , H04L7/06 , H04L27/06 , H04L27/30
CPC分类号： H04B1/7087 , H04B7/2125
摘要： The invention relates to a control signal for receivers, said control signal being formed by juxtaposing two signal elements of equal duration, and time symmetrical. For example, the signal comprises at least one first pseudo-random noise digital sequence s(N.sub.s -1) to s(0) and, periodically, at least one second digital sequence s(N.sub.s -1) to s(0), corresponding to the inverse, obtained by time symmetry, of said first sequence. The signal may be used in particular for performing time and frequency synchronization on receivers and/or for equalizing signals received by said receivers. The invention also relates to methods and apparatuses that use said signal.
摘要翻译：本发明涉及一种用于接收机的控制信号，所述控制信号通过并置两个相等持续时间的信号元件和时间对称而形成。例如，信号包括至少一个第一伪随机噪声数字序列s（Ns-1）至s（0），并周期性地至少一个第二数字序列s（Ns-1）至s（0），对应于通过所述第一序列的时间对称获得的逆。该信号可以特别用于在接收机上执行时间和频率同步和/或用于均衡由所述接收机接收的信号。本发明还涉及使用所述信号的方法和装置。

6. 发明授权

US07280067B2 Radar detector and radar detecting method for WLAN systems according to 802.11 wireless communication standards 有权
标题翻译：基于802.11无线通信标准的WLAN系统的雷达探测器和雷达检测方法
公开(公告)号：US07280067B2
公开(公告)日：2007-10-09
申请号：US11132552
申请日：2005-05-19
申请人： Alain Chiodini
发明人： Alain Chiodini
IPC分类号： G01S7/40
CPC分类号： G01S7/021 , H04W16/14
摘要： The present invention relates to a radar detector and a radar detecting method for WLAN systems according to 802.11 wireless communication standards, and particularly concerns the radar detection for 802.11 h dynamic frequency selection mechanism. The essence of the innovation consists in projecting the received phase vector on the signal subspace orthogonal to the expected radar pulse subspace and taking the norm of the resulting vector. The closer the norm is to zero, the more likely the received signal is to be a radar pulse. The invention is able to detect both, sinusoidal radar signals and chirp-like radar signals.
摘要翻译：本发明涉及根据802.11无线通信标准的WLAN系统的雷达检测器和雷达检测方法，特别涉及用于802.11h动态频率选择机制的雷达检测。创新的本质在于将接收到的相位矢量投影在与预期的雷达脉冲子空间正交的信号子空间上，并取得所得到的矢量的范数。规范越接近零，接收信号越有可能成为雷达脉冲。本发明能够检测正弦波雷达信号和啁啾状雷达信号。

7. 发明申请

US20060203926A1 Apparatus and method for detecting preambles according to IEEE 802.11A wireless LAN standard 审中-公开
标题翻译：根据IEEE 802.11A无线局域网标准检测前导码的装置和方法
公开(公告)号：US20060203926A1
公开(公告)日：2006-09-14
申请号：US11347943
申请日：2006-02-06
申请人： Alain Chiodini
发明人： Alain Chiodini
IPC分类号： H04K1/10
CPC分类号： H04L27/2613 , H04L27/2656 , H04L27/2666 , H04L27/2689 , H04W84/12
摘要： A novel method and apparatus for short preamble detection within the framework of the 802.11a standard is described. The present invention can be easily implemented in both the radio part (preferred embodiment) and the baseband part (general case) of the receiver to provide short preamble detection. The inventive method and apparatus utilize either a notch comb filter to remove the rake of subcarriers composing the short preamble or a battery of bandpass filters to enhance them. A decision on the presence of the short preamble is made by comparing the magnitude associated to certain qualities of the input and output sequences to a preset threshold. The proposed innovation offers a significant advantage over conventional approaches in terms of gate count and power consumption.
摘要翻译：描述了在802.11a标准的框架内用于短前导码检测的新颖方法和装置。本发明可以容易地在接收机的无线电部分（优选实施例）和基带部分（一般情况下）中实现，以提供短前导码检测。本发明的方法和装置利用陷波梳状滤波器来去除组成短前导码的副载波的耙子或带通滤波器的电池以增强它们。通过将与输入和输出序列的某些质量相关联的幅度与预设的阈值进行比较来做出关于短前同步码存在的决定。所提出的创新在门数和功耗方面比传统方法具有显着的优势。

8. 发明授权

US07039140B2 OFDM data demodulators synchronization 有权
标题翻译： OFDM数据解调器同步
公开(公告)号：US07039140B2
公开(公告)日：2006-05-02
申请号：US09803081
申请日：2001-03-08
申请人： John Reagan , Alain Chiodini
发明人： John Reagan , Alain Chiodini
IPC分类号： H04L7/00
CPC分类号： H04L27/2656 , H04L1/0045 , H04L1/0071 , H04L27/2675
摘要： Orthogonal frequency division multiplexing (OFDM) receiver embodiments of the invention provide data demodulator synchronization by finding the end of the short preamble in an IEEE-802.11a burst transmission. This method exploits the fact that there are certain symmetries in the long-preamble that can be used to determine synchronization. The long-preamble sequence is composed of a guard interval (GI) and two long-preamble symbols; the GI is the last 32 samples of the long-preamble symbol. The 32nd sample of the long-preamble acts as a “pilot” or “anchor” sample in that the previous N and subsequent N samples are complex conjugates, or conjugate “mirror” vectors. Due to the periodicities of the long-preamble, this property repeats every 32 samples. No other samples in the long preamble exhibit this property. Coherent combining is used in one embodiment for robustness. Once this “pilot” or “anchor” sample is located, the end of the short-preamble is declared to have occurred 32 samples earlier, thus establishing a time reference.
摘要翻译：本发明的正交频分复用（OFDM）接收机实施例通过在IEEE-802.11a突发传输中找到短前导码的结束来提供数据解调器同步。该方法利用了长前导码中可以使用某些对称性来确定同步的事实。长前置码序列由保护间隔（GI）和两个长前同步码符号组成; GI是长前缀符号的最后32个样本。长前置码的32个样本作为“导频”或“锚”样本，其中先前N个和后续N个采样是复共轭或共轭“镜像”矢量。由于长序列的周期性，该属性每32个样本重复一次。长序列中没有其他样本显示此属性。在一个实施例中，相干组合用于鲁棒性。一旦这个“导频”或“锚”样本被定位，则前导序列的末尾被宣布已经发生了32个样本，从而建立了时间参考。

9. 发明授权

US06882691B2 Fine-frequency offset estimation 有权
标题翻译：精细频偏估计
公开(公告)号：US06882691B2
公开(公告)日：2005-04-19
申请号：US09802586
申请日：2001-03-08
申请人： Alain Chiodini
发明人： Alain Chiodini
IPC分类号： H04L27/26 , H04L27/16
CPC分类号： H04L27/2675 , H04L27/266
摘要： Orthogonal frequency division multiplexing (OFDM) receiver embodiments of the invention demodulate quadrature amplitude modulated (QAM) signals transmitted in the five GHz frequency band and digitally correct for frequency offset errors in their digital signal processing (DSP) units. A method comprises a step in which an OFDM transmission is I/Q sampled and a portion of the received packet is selected. It is assumed that the coarse frequency offset has been estimated and that the remaining frequency offset after coarse frequency offset compensation does not exceed ±10 kHz (valid for 802.11a PHY implementation only). It is also assumed that a timing reference has been determined. A cost function is used to determine a fine-frequency offset. Once the fine frequency offset is determined, the estimate is used in the downstream digital signal processing.
摘要翻译：本发明的正交频分复用（OFDM）接收机实施例解调了在5GHz频带中发送的正交调幅（QAM）信号，并对其数字信号处理（DSP）单元中的频偏进行数字校正。一种方法包括以下步骤：对OFDM传输进行I / Q采样，并且接收到的分组的一部分被选择。假设粗略的频率偏移已被估计，并且粗略的频率偏移补偿之后的剩余频率偏移量不超过±10 kHz（仅适用于802.11a PHY实现）。还假设已经确定了定时参考。使用成本函数来确定精细频率偏移。一旦确定了精细的频率偏移，则在下游数字信号处理中使用该估计。

10. 发明授权

US5909675A Device for recognizing information conveyed by a received signal 失效
标题翻译：用于识别由接收信号传送的信息的装置
公开(公告)号：US5909675A
公开(公告)日：1999-06-01
申请号：US542841
申请日：1995-10-13
申请人： Alain Chiodini
发明人： Alain Chiodini
IPC分类号： G06F15/18 , G06N3/00 , H03H21/00 , H04B3/04 , H04B7/005 , H04L25/03 , G06K9/62
CPC分类号： H04L25/03165 , H04L2025/03464
摘要： For recognizing information conveyed by a received signal, represented by convention by possible elementary forms of the signal to be transmitted, a device includes a correlator for establishing a correlation between the received signal and various possible forms of signal, in accordance with the convention. A neural network using correlation coefficients obtained from the correlator is trained by application to its input of correlation coefficients corresponding to a received signal conveying given information whilst imposing the given information at its output. The network supplies recognized information.
摘要翻译：为了识别由接收信号传送的信息，由通过将要发送的信号的可能的基本形式表示的接收信号，设备包括用于根据惯例在接收信号和各种可能形式的信号之间建立相关性的相关器。使用从相关器获得的相关系数的神经网络通过应用于其输入与输入给定信息的接收信号相对应的相关系数而被训练，同时在其输出处施加给定信息。网络提供公认的信息。

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