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1. 发明授权

US6038577A Efficient way to produce a delayed version of a maximum length sequence using a division circuit 失效
标题翻译：使用分割电路产生最大长度序列的延迟版本的有效方式
公开(公告)号：US6038577A
公开(公告)日：2000-03-14
申请号：US5032
申请日：1998-01-09
申请人： David Burshtein
发明人： David Burshtein
IPC分类号： G06F7/72 , G06F7/58 , G06F7/00
CPC分类号： G06F7/724 , G06F7/723
摘要： Method and apparatus for efficiently producing a delayed version of a maximum length sequence output from a linear feedback shift register. Polynomial (vector) exponentiation is performed instead of matrix exponentiation to calculate the mask coefficients which yield the delayed sequence from the linear feedback shift register. Polynomial (vector) operations are much simpler and faster than the corresponding matrix operations and require substantially less circuitry and computational effort. Modulo exponentiation of polynomials is done by repeated squaring and shifting, and a division circuit built on a linear feedback shift register is provided to perform an efficient modulo squaring of polynomials.
摘要翻译：用于有效地产生从线性反馈移位寄存器输出的最大长度序列的延迟版本的方法和装置。执行多项式（向量）取幂而不是矩阵求幂来计算从线性反馈移位寄存器产生延迟序列的掩模系数。多项式（矢量）运算比相应的矩阵运算要简单得多，并且要求较少的电路和计算量。通过重复的平方和移位来进行多项式的模求幂，并且提供一个内置在线性反馈移位寄存器上的分频电路，以执行多项式的有效模数平方。

2. 发明授权

US06323727B1 Apparatus and method for detecting digital FM 有权
标题翻译：数字FM检测装置及方法
公开(公告)号：US06323727B1
公开(公告)日：2001-11-27
申请号：US09443866
申请日：1999-11-19
申请人： David Burshtein , Doron Rainish
发明人： David Burshtein , Doron Rainish
IPC分类号： H04L2714
CPC分类号： H04L25/4904 , H04L27/1525
摘要： A symbol detector for frequency modulated (FM) symbols includes a section determiner, a direction of movement determiner and a data symbol determiner. The section determiner receives a sample of in-phase and quadrature signals associated with a baseband transmitted FM symbol and determines the section value of a unit circle in an in-phase—quadrature coordinate system in which the sample lies. The direction of movement determiner receives the section value of a current sample and the section value of a neighboring sample and generates a positive direction of movement value if the direction of movement along the unit circle from the neighboring sample to the current sample is counterclockwise, a negative direction of movement value if the direction of movement is clockwise and 0 otherwise. The data symbol determiner receives the direction of movement values and decodes the transmitted FM symbol by masking N direction of movement values.
摘要翻译：用于频率调制（FM）符号的符号检测器包括部分确定器，移动确定器的方向和数据符号确定器。部分确定器接收与基带传输的FM符号相关联的同相和正交信号的样本，并确定样本所在的同相正交坐标系中的单位圆的截面值。移动确定器的方向接收当前采样的截面值和相邻采样的截面值，并且如果沿着从相邻采样到当前采样的单位圆的移动方向是逆时针方向，则生成正的运动方向值，a 如果运动方向为顺时针方向，则为负方向运动值，否则为0。数据符号确定器接收移动值的方向，并通过屏蔽移动值的N个方向对发送的FM符号进行解码。

3. 发明授权

US06788708B1 Code synchronization unit and method 失效
标题翻译：代码同步单元和方法
公开(公告)号：US06788708B1
公开(公告)日：2004-09-07
申请号：US09583898
申请日：2000-06-01
申请人： Doron Rainish , David Ben-Eli , David Burshtein , Shlomo Shamai
发明人： Doron Rainish , David Ben-Eli , David Burshtein , Shlomo Shamai
IPC分类号： H04J1300
CPC分类号： H04B1/707
摘要： A pilot acquisition unit for code division multiple access (CDMA) communication systems is provided which includes a fast Hadamard transform (FHT) unit and a pre-Hadamard processing unit. The FHT unit determines the quality, in accordance with a metric, of each of a set of possible pseudo-random number (PN) loadings and the pre-Hadamard processing unit generates a vector u per set of PN loadings. The vector u defines a quality metric of a received pilot signal with the set of possible PN loadings, the pre-Hadamard processing unit providing the vector u to the FHT unit.
摘要翻译：提供了一种用于码分多址（CDMA）通信系统的导频获取单元，其包括快速Hadamard变换（FHT）单元和前Hadamard处理单元。 FHT单元根据度量，确定一组可能的伪随机数（PN）加载中的每一个的质量，并且前哈达玛处理单元在每个PN加载集合中生成向量u。矢量u使用一组可能的PN加载来定义接收到的导频信号的质量度量，前Hadamard处理单元向FHT单元提供向量u。

4. 发明授权

US06298102B1 Maximum likelihood sequence estimation in the presence of co-channel interference 有权
标题翻译：存在同信道干扰时的最大似然序列估计
公开(公告)号：US06298102B1
公开(公告)日：2001-10-02
申请号：US09536534
申请日：2000-03-28
申请人： Doron Rainish , David Burshtein
发明人： Doron Rainish , David Burshtein
IPC分类号： H04L2706
CPC分类号： H03M13/39 , H04L25/03305 , H04L25/03337
摘要： A method for conducting an improved approximated maximum likelihood decoding on a received signal on a receiving side, in the presence of a co-channel interference. The method include a determination regarding the maximum likely sequence which uses the improved decision metric in the following format ∑ n ⁢ ( &LeftBracketingBar; y n - d n &RightBracketingBar; - β ⁢ ⁢ C ) 2 , wherein yn is the received signal, dn is the hypothesized received signal excluding an additive channel interference, &bgr; is an empirical coefficient, wherein &bgr;>1, preferably 0≦1, and C is the envelope of a signal of the co-channel interference.
摘要翻译：在存在共信道干扰的情况下，对接收侧的接收信号进行改进的近似最大似然解码的方法。该方法包括关于使用以下格式的改进的决策度量的最大可能序列的确定，其中yn是接收信号，dn是排除加性信道干扰的假设接收信号，β是经验系数，其中β> 1，优选地 0 <= 1，C是同信道干扰信号的包络。

5. 发明授权

US5994953A Apparatus and method for detecting digital FM 失效
标题翻译：数字FM检测装置及方法
公开(公告)号：US5994953A
公开(公告)日：1999-11-30
申请号：US049870
申请日：1998-03-27
申请人： David Burshtein , Doron Rainish
发明人： David Burshtein , Doron Rainish
IPC分类号： H04L25/49 , H04L27/152 , H04L27/14
CPC分类号： H04L25/4904 , H04L27/1525
摘要： A symbol detector for frequency modulated (FM) symbols includes a section determiner, a direction of movement determiner and a data symbol determiner. The section determiner receives a sample of in-phase and quadrature signals associated with a baseband transmitted FM symbol and determines the section value of a unit circle in an in-phase--quadrature coordinate system in which the sample lies. The direction of movement determiner receives the section value of a current sample and the section value of a neighboring sample and generates a positive direction of movement value if the direction of movement along the unit circle from the neighboring sample to the current sample is counterclockwise, a negative direction of movement value if the direction of movement is clockwise and 0 otherwise. The data symbol determiner receives the direction of movement values and decodes the transmitted FM symbol by masking N direction of movement values.
摘要翻译：用于频率调制（FM）符号的符号检测器包括部分确定器，移动确定器的方向和数据符号确定器。部分确定器接收与基带传输的FM符号相关联的同相和正交信号的样本，并确定样本所在的同相正交坐标系中的单位圆的截面值。移动确定器的方向接收当前采样的截面值和相邻采样的截面值，并且如果沿着从相邻采样到当前采样的单位圆的移动方向是逆时针方向，则生成正的运动方向值，a 如果运动方向为顺时针方向，则为负方向运动值，否则为0。数据符号确定器接收移动值的方向，并通过屏蔽移动值的N个方向对发送的FM符号进行解码。

6. 发明授权

US06560744B1 Method and device for detecting rate 有权
标题翻译：检测率的方法和装置
公开(公告)号：US06560744B1
公开(公告)日：2003-05-06
申请号：US09583900
申请日：2000-06-01
申请人： David Burshtein
发明人： David Burshtein
IPC分类号： H03M1335
CPC分类号： H04L1/08 , H04L1/0046
摘要： Device for determining the rate of a received communication frame, including a plurality of encoded signal quality estimators, each at a different rate, a decision controller, connected to the encoded signal quality estimators, a decoder connected to the controller and an erasure detection unit connected to the decoder and the controller, wherein each of the quality estimators processes the received encoded frame according to an encoded signal quality criteria, thereby producing a quality value, wherein the controller selects the rate with the best quality value, the decoder decodes the encoded frame according to the selected rate and the erasure detection unit analyzing the decoded frame, thereby determining it as allowed or as erased.
摘要翻译：用于确定接收到的通信帧的速率的装置，包括多个编码的信号质量估计器，每个以不同的速率，连接到编码信号质量估计器的判定控制器，连接到控制器的解码器和连接的擦除检测单元其中每个质量估计器根据编码的信号质量标准处理接收到的编码帧，由此产生质量值，其中控制器选择具有最佳质量值的速率，解码器对编码帧进行解码根据所选择的速率和擦除检测单元分析解码帧，从而将其确定为允许或擦除。

7. 发明授权

US6163548A Code synchronization unit and method 失效
标题翻译：代码同步单元和方法
公开(公告)号：US6163548A
公开(公告)日：2000-12-19
申请号：US869728
申请日：1997-06-05
申请人： Doron Rainish , David Ben-Eli , David Burshtein , Shlomo Shamai
发明人： Doron Rainish , David Ben-Eli , David Burshtein , Shlomo Shamai
IPC分类号： H04L27/22 , H04B1/707 , H04L7/00 , H04J13/00
CPC分类号： H04B1/707
摘要： A pilot acquisition unit for code division multiple access (CDMA) communication systems is provided which includes a fast Hadamard transform (FHT) unit and a pre-Hadamard processing unit. The FHT unit determines the quality, in accordance with a metric, of each of a set of possible pseudo-random number (PN) loadings and the pre-Hadamard processing unit generates a vector u per set of PN loadings. The vector u defines a quality metric of a received pilot signal with the set of possible PN loadings, the pre-Hadamard processing unit providing the vector u to the FHT unit.
摘要翻译：提供了一种用于码分多址（CDMA）通信系统的导频获取单元，其包括快速Hadamard变换（FHT）单元和前Hadamard处理单元。 FHT单元根据度量，确定一组可能的伪随机数（PN）加载中的每一个的质量，并且前哈达玛处理单元在每个PN加载集合中生成向量u。矢量u使用一组可能的PN加载来定义接收到的导频信号的质量度量，前Hadamard处理单元向FHT单元提供向量u。

8. 发明授权

US6112325A Method and device for detecting rate 失效
公开(公告)号：US6112325A
公开(公告)日：2000-08-29
申请号：US12338
申请日：1998-01-23
申请人： David Burshtein
发明人： David Burshtein
IPC分类号： H04L1/00 , H04L1/08 , H03M13/35 , H03M13/41
CPC分类号： H04L1/08 , H04L1/0046
摘要： Device for determining the rate of a received communication frame, including a plurality of encoded signal quality estimators, each at a different rate, a decision controller, connected to the encoded signal quality estimators, a decoder connected to the controller and an erasure detection unit connected to the decoder and the controller, wherein each of the quality estimators processes the received encoded frame according to an encoded signal quality criteria, thereby producing a quality value, wherein the controller selects the rate with the best quality value, the decoder decodes the encoded frame according to the selected rate and the erasure detection unit analyzing the decoded frame, thereby determining it as allowed or as erased.

9. 发明授权

US5778342A Pattern recognition system and method 失效
标题翻译：模式识别系统和方法
公开(公告)号：US5778342A
公开(公告)日：1998-07-07
申请号：US595357
申请日：1996-02-01
申请人： Adoram Erell , David Burshtein
发明人： Adoram Erell , David Burshtein
IPC分类号： G10L15/06 , G10L15/12 , G10L15/14 , G10L15/20 , G10L5/06
CPC分类号： G10L15/063 , G10L15/12 , G10L15/142 , G10L21/0216
摘要： A pattern recognition system and method is disclosed. The method includes the steps of a) providing a noisy test feature set of the input signal, a plurality of reference feature sets of reference templates produced in a quiet environment, and a background noise feature set of background noise present in the input signal, b) producing adapted reference templates from the test feature set, the background noise feature set and the reference feature sets and c) determining match scores defining the match between each of the adapted reference templates and the test feature set. The method can also include adapting the scores before accepting a score as the result. The system and method are described for both Hidden Markov Model (HMM) and Dynamic Time Warping (DTW) scoring units. The system performs the steps of the method.
摘要翻译：公开了一种图案识别系统和方法。该方法包括以下步骤：a）提供输入信号的噪声测试特征集合，在安静环境中产生的参考模板的多个参考特征集合以及输入信号中存在的背景噪声背景噪声特征集合，b ）从测试特征集，背景噪声特征集合和参考特征集合产生适应参考模板，以及c）确定定义每个适配参考模板和测试特征集之间的匹配的匹配分数。该方法还可以包括在接受得分之前调整分数作为结果。描述了隐马尔可夫模型（HMM）和动态时间扭曲（DTW）评分单元的系统和方法。系统执行该方法的步骤。

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