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1. 发明授权

US06680987B1 Fading communications channel estimation and compensation 有权
标题翻译：衰落通信信道估计和补偿
公开(公告)号：US06680987B1
公开(公告)日：2004-01-20
申请号：US09634018
申请日：2000-08-08
申请人： Bassel F. Beidas , Long Huynh
发明人： Bassel F. Beidas , Long Huynh
IPC分类号： H04D100
CPC分类号： H04L25/0232 , H04L25/03292
摘要： A method for estimating and compensating for a fading communications channel includes the steps of generating matched filter data from a received data burst, interpolating between reference symbols to generate a fading channel estimate from the matched filter data, applying a phase correction to the matched filter data from the fading channel estimate to recover free data from the matched filter data, and performing decision feedback on the free data to improve the fading channel estimate.
摘要翻译：一种用于估计和补偿衰落通信信道的方法包括以下步骤：从接收的数据脉冲串生成匹配的滤波数据，在参考符号之间内插，以从匹配的滤波数据生成衰落信道估计，对匹配的滤波数据应用相位校正从衰落信道估计中，从匹配的滤波数据中恢复空闲数据，并对空闲数据执行判决反馈以改善衰落信道估计。

2. 发明授权

US06819724B2 Viterbi decoder and Viterbi decoding method 有权
标题翻译：维特比解码器和维特比解码方法
公开(公告)号：US06819724B2
公开(公告)日：2004-11-16
申请号：US09737597
申请日：2000-12-18
申请人： Atsushi Hayami , Tsuyoshi Oki
发明人： Atsushi Hayami , Tsuyoshi Oki
IPC分类号： H04D100
CPC分类号： H03M13/6331 , G11B20/10009 , H03M13/3961 , H03M13/41 , H03M13/6343
摘要： A data estimating circuit outputs estimation data which estimates input data at a time earlier by a predetermined bit cycle than the input data based on decoded data series outputted from a path memory. A target value computing circuit corrects the target value with a difference between the estimation data and input data as a target value error and outputs obtained plural first target values to a branchmetric operating circuit as plural target values. Because the branchmetric operating circuit can conduct branchmetric operation based on plural first target values near plural averages having the highest incidence (having peaks in histogram), decoding performance can be improved more as compared to using fixed target values.
摘要翻译：数据估计电路输出基于从路径存储器输出的解码数据序列，输出预测数据比预定的位周期预测输入数据的估计数据。目标值计算电路用估计数据和输入数据之间的差作为目标值误差来校正目标值，并将获得的多个第一目标值作为多个目标值输出到分支操作电路。由于分支操作电路可以基于具有最高入射角（具有直方图峰值）的多个平均值附近的多个第一目标值进行支路测量操作，所以与使用固定目标值相比，可以更好地提高解码性能。

3. 发明授权

US06614859B2 Method and system for angle of arrival estimation and data detection using vector per-survivor processing of signals from an array of antennas 失效
标题翻译：使用向量每幸存者处理来自天线阵列的信号的到达角估计和数据检测方法和系统
公开(公告)号：US06614859B2
公开(公告)日：2003-09-02
申请号：US09084615
申请日：1998-05-26
申请人： Norman E. Lay
发明人： Norman E. Lay
IPC分类号： H04D100
CPC分类号： H04L25/03337 , H01Q3/26 , H01Q3/30
摘要： A method and a system are provided which uses vector per-survivor processing (PSP) on the outputs of an array of antennas of arbitrary geometry to jointly estimate angles of arrival of multipath components of the transmitted data sequence (i.e., the modulated data signal) while extracting an estimate of the modulated data. The system includes an antenna array of arbitrary geometry (i.e., arbitrary spacing between elements, directional, omnidirectional, etc.), each element of which has its output applied to a corresponding matched filter. The matched filter outputs in turn are sampled and applied to a vector-type PSP engine, wherein the vector PSP engine computes an estimate of the channels between the transmitter antenna and the receiver antenna elements to construct a channel estimation matrix. Angle of arrival estimates of each of the multipath components are extracted from the channel estimation matrix for the best survivor. An estimate of the transmitted data sequence is also extracted based on the best survivor. The PSP engine performs its function in the form of equations that solve for the vector estimates of complex channels, where the channel models include multipath angles of arrival.
摘要翻译：提供了一种方法和系统，其在任意几何的天线阵列的输出上使用向量每幸存者处理（PSP）来共同估计所发送的数据序列的多径分量的到达角（即调制的数据信号）同时提取调制数据的估计。该系统包括具有任意几何形状的天线阵列（即，元件之间的任意间隔，定向，全向等），其每个元件的输出都被施加到相应的匹配滤波器。匹配的滤波器输出依次被采样并应用于矢量型PSP引擎，其中矢量PSP引擎计算发射机天线和接收机天线元件之间的信道的估计，以构建信道估计矩阵。从用于最佳幸存者的信道估计矩阵中提取每个多径分量的到达角估计。还根据最佳幸存者提取传输数据序列的估计。 PSP引擎以解决复杂信道的向量估计的方程式的形式执行其功能，其中信道模型包括多径到达角。

4. 发明授权

US06580769B1 Method and apparatus for backward recursion next state generation in recursive convolutional decoding 有权
标题翻译：递归卷积解码中后向递归下一状态生成的方法和装置
公开(公告)号：US06580769B1
公开(公告)日：2003-06-17
申请号：US09503791
申请日：2000-02-14
申请人： Tyler Brown , Michael M. Wang
发明人： Tyler Brown , Michael M. Wang
IPC分类号： H04D100
CPC分类号： H03M13/3922 , H03M13/41 , H03M13/6502 , H03M13/6505
摘要： A decoding method and apparatus performs a forward recursion process on recursive convolutionally generated symbols and performs backward recursion on the symbols wherein a next state for the backward recursion process is based on linearly combining both a plurality of bits defining a current state of a backward recursion process and a hypothesized information bit. In one embodiment, a backward state determinator (200) combines all binary bits in a current state backward recursion register (202) to generate a most significant bit (MSB) (210) of a next state backward recursion register (204). To obtain remaining bits of the next state backward recursion register (204), bits (207a-207n) in the current state backward recursion register (202) are shifted. The shifted bits then serve as the least significant bits (208a-208n) in the next state backward recursion register (204). Accordingly, a suitable linear combination and bit shifting approach is used to determine the content of a next state backward recursion register (204).
摘要翻译：解码方法和装置对递归卷积生成符号执行正向递归处理，并对符号执行反向递归，其中用于反向递归处理的下一状态是基于线性组合定义了向后递归过程的当前状态的多个位和假设的信息位。在一个实施例中，后向状态确定器（200）组合当前状态反向递归寄存器（202）中的所有二进制位以产生下一状态向递归寄存器（204）的最高有效位（MSB）（210）。为了获得下一状态反向递归寄存器（204）的剩余位，当前状态反向递归寄存器（202）中的位（207a-207n）被移位。移位的位然后用作下一状态反向递归寄存器（204）中的最低有效位（208a-208n）。因此，使用适当的线性组合和比特移位方法来确定下一状态反向递归寄存器（204）的内容。

5. 发明授权

US06697444B1 Recycling integrator correlator 失效
标题翻译：回收积分器相关器
公开(公告)号：US06697444B1
公开(公告)日：2004-02-24
申请号：US09499631
申请日：2000-02-08
申请人： Kunihiko Iizuka , Daniel Senderowicz
发明人： Kunihiko Iizuka , Daniel Senderowicz
IPC分类号： H04D100
CPC分类号： G06F17/15
摘要： An analog input signal that is sampled at a predetermined rate is multiplied by a corresponding binary code sequence, i.e. “+1” or “−1” by the multiplier. The output of this multiplier is applied in conjunction with a signal supplied by the negative feed back circuit to the analog integrator. The quantization circuit quantizes the output signal of the analog integrator into N levels and outputs a digital word. This digital word is delayed by a unit time interval by a digital delay circuit and then processed by the above mentioned negative feed back circuit. As a result of this signal magnitude reducing process, the required integrating capacitance can be minimized without risks of saturation effects. Additionally, the output is already in digital form as required by the subsequent system blocks.
摘要翻译：以预定速率采样的模拟输入信号乘以相应的二进制码序列，即乘法器为“+1”或“-1”。该乘法器的输出结合由负反馈电路提供给模拟积分器的信号。量化电路将模拟积分器的输出信号量化为N个电平并输出数字字。该数字字由数字延迟电路延迟单位时间间隔，然后由上述负反馈电路处理。作为该信号幅度降低处理的结果，可以最小化所需的积分电容，而不会产生饱和效应的风险。此外，输出已经是随后系统块所要求的数字形式。

6. 发明授权

US06606280B1 Voice-operated remote control 失效
标题翻译：语音遥控器
公开(公告)号：US06606280B1
公开(公告)日：2003-08-12
申请号：US09255288
申请日：1999-02-22
申请人： Guenter Knittel
发明人： Guenter Knittel
IPC分类号： H04D100
CPC分类号： H04B1/202 , G08C2201/31 , G10L15/26
摘要： This disclosure provides a voice-operated remote control intended to replace multiple entertainment system remotes, and it preferably includes two parts, a base unit and a remote (or table-top) unit. During normal operation, the base unit receives each electronic speaker driver signal from a stereo receiver or other sound source and uses speaker-specific transfer functions to generate an “audio mimic signal” which accounts for room acoustics and circuitry distortions. This signal is then subtracted from detected sound and a residual is used to detect spoken commands. In response to spoken commands, learned IR commands are transmitted by the base unit to the remote unit, which then repeats these commands, directing them toward the appropriate entertainment system. Learning of room acoustics and of IR and spoken commands are each performed in discrete modes. During a speaker learning mode, the base unit causes each speaker in turn to generate a test pattern which is measured via microphone and used to develop a speaker-specific transfer function. During a command learning mode, a user speaks each command (e.g., “TV on,” “Tape Off,” “louder,” etc) several times into the remote unit until that spoken command is “learned” and recognizable.
摘要翻译：该公开提供了用于替换多个娱乐系统遥控器的语音操作遥控器，并且其优选地包括两个部件，即基本单元和远程（或桌面）单元。在正常操作期间，基本单元从立体声接收器或其他声源接收每个电子扬声器驱动器信号，并使用特定于扬声器的传递函数来产生考虑室内声学和电路失真的“音频模拟信号”。然后从检测到的声音中减去该信号，并使用残差来检测口头命令。响应于口语命令，学习的IR命令由基本单元发送到远程单元，然后重复这些命令，将它们指向适当的娱乐系统。室内声学和IR和口语命令的学习都以离散模式进行。在扬声器学习模式期间，基本单元使得每个扬声器依次产生通过麦克风测量的测试图案，并用于开发特定于扬声器的传递功能。在命令学习模式期间，用户将多个命令（例如，“打开电视”，“磁带关闭”，“更响亮”等）多次进入远程单元，直到该语音命令被“学习”并且可识别为止。

7. 发明授权

US06393077B1 Correction detecting device and its method 失效
标题翻译：校正检测装置及其方法
公开(公告)号：US06393077B1
公开(公告)日：2002-05-21
申请号：US09499517
申请日：2000-02-09
申请人： Takashi Usui
发明人： Takashi Usui
IPC分类号： H04D100
CPC分类号： H04B1/7093 , H04B1/707
摘要： A correlation detecting device and method for detecting a specified code contained in a received signal. Is characterized by detecting a predetermined code from a received signal by a matched filter as well as detecting the average amplitude of the received signal, multiplying the detected signal of the average amplitude by a threshold, comparing the multiplied signal with the output of the matched filter, and obtaining a correlation detecting signal based on the comparison. This can assure a correlation detection in a small circuitry at a low cost with only a multiplier as the computational unit for correlation detection.
摘要翻译：一种用于检测包含在接收信号中的指定码的相关检测装置和方法。其特征在于通过匹配滤波器从接收信号中检测预定码，以及检测接收信号的平均幅度，将检测到的平均振幅信号乘以阈值，将乘法信号与匹配滤波器的输出进行比较，并且基于该比较获得相关检测信号。这可以以低成本确保小电路中的相关检测，而仅使用乘数作为相关检测的计算单元。

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