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1. 发明授权

US06631157B1 Multi-clock matched filter for receiving signals with multipath 失效
标题翻译：多时钟匹配滤波器，用于接收具有多路径的信号
公开(公告)号：US06631157B1
公开(公告)日：2003-10-07
申请号：US09526867
申请日：2000-03-16
申请人： Sorin Davidovici , Jimmy Cuong Tran , Emmanuel Kanterakis
发明人： Sorin Davidovici , Jimmy Cuong Tran , Emmanuel Kanterakis
IPC分类号： H04B169
CPC分类号： H04B1/7115 , H04B1/7093
摘要： A multi-clock matched filter for receiving signals with multipath. The signals may be modulated with a spread-spectrum spreading sequence, or other analog or digital signal. A number of signal registers store digital samples of the received signal. The gating of digital samples into each of the signal registers is controlled by a separate clock timing. The timing sequence may be derived from a common clock. A multiplexer sequentially selects each of the signal registers, and passes the respective content of each signal register to a matched filter. A number of delay-locked-loop circuits track each of the multipath signals, and generate the timing sequence for gating signal registers.
摘要翻译：多时钟匹配滤波器，用于接收多径信号。信号可以用扩频扩频序列或其他模拟或数字信号进行调制。多个信号寄存器存储接收信号的数字样本。每个信号寄存器中的数字采样门控由单独的时钟定时控制。定时序列可以从公共时钟导出。复用器顺序地选择每个信号寄存器，并将每个信号寄存器的各个内容传递给匹配滤波器。多个延迟锁定环路跟踪每个多径信号，并产生门控信号寄存器的定时序列。

2. 发明授权

US06393049B1 Two-stage synchronization of spread-spectrum signals 失效
标题翻译：扩频信号的两级同步
公开(公告)号：US06393049B1
公开(公告)日：2002-05-21
申请号：US09182054
申请日：1998-10-29
申请人： Sorin Davidovici , Emmanuel Kanterakis
发明人： Sorin Davidovici , Emmanuel Kanterakis
IPC分类号： H04B1707
CPC分类号： H04W52/221 , H04B1/708 , H04B1/7093 , H04W52/226 , H04W52/228 , H04W52/24
摘要： A spread-spectrum-matched-filter apparatus including a code generator, an in-phase-symbol-matched filter, a quadrature-phase-symbol-matched filter, an in-phase-frame-matched filter, a quadrature-phase-frame-matched filter, and a controller. The code generator generates replicas of a chip-sequence signal, which are used to set the symbol-impulse responses of the in-phase-symbol-matched filter and the quadrature-phase-symbol-matched filter. The in-phase-frame-matched filter and the quadrature-phase-frame-matched filter detect a despread-header-symbol-sequence signal and generate a maximum output signal which may be used as a data-start signal or for synchronizing the timing of the controller as to when to trigger sampling of the A/D converter, the output of the symbol-matched filters, detection of the data-symbol-sequence signal and other time-dependent processes.
摘要翻译：一种扩频匹配滤波器装置，包括码发生器，同相符号匹配滤波器，正交相位符号匹配滤波器，同相帧匹配滤波器，正交相位帧匹配的过滤器和控制器。代码生成器生成芯片序列信号的副本，其用于设置同相符号匹配滤波器和正交相符号匹配滤波器的符号脉冲响应。同相帧匹配滤波器和正交相位帧匹配滤波器检测去扩展标题符号序列信号，并产生最大输出信号，其可以用作数据启动信号或同步定时控制器何时触发A / D转换器的采样，符号匹配滤波器的输出，数据符号序列信号的检测和其他时间依赖过程。

3. 发明授权

US06304592B1 Coherent detection using matched filter enhanced spread spectrum demodulation 失效
标题翻译：使用匹配滤波器的相干检测增强扩频解调
公开(公告)号：US06304592B1
公开(公告)日：2001-10-16
申请号：US09605508
申请日：2000-06-28
申请人： Sorin Davidovici , Emmanuel Kanterakis , Donald L. Schilling
发明人： Sorin Davidovici , Emmanuel Kanterakis , Donald L. Schilling
IPC分类号： H04K100
CPC分类号： H04B1/7085 , H04B1/7093 , H04L27/2273 , H04L2027/0028 , H04L2027/0057
摘要： A spread-spectrum-phase-locked-loop apparatus and method for coherent detection without a pilot channel. The system comprises symbol-matched means, a voltage-controlled oscillator (VCO), a first product device, a second product device, a third product device, a fourth product device, a first combiner, a second combiner, and a fifth product device. The method comprises the steps of despreading, from a received spread-spectrum signal, an in-phase component and a quadrature-phase component of a symbol sequence signal using the symbol-matched means. The first and second product devices multiply the despread in-phase component by the VCO-cosine and the VCO-sine signals, respectively, to generate a first and a second product signal. The third and fourth product devices multiply the despread quadrature-phase component by the VCO-sine and the VCO-cosine signals, respectively, to generate a third and a fourth product signal. The first combiner combines the first and third product signals to generate a first combined signal. The second combiner combines the second and fourth product signals to generate a second combined signal. The fifth product device multiplies the first and second combined signals to generate an error signal, responsive to which the VCO adjusts the sine and cosine signal levels.
摘要翻译：一种用于没有导频信道的相干检测的扩频锁相环装置和方法。该系统包括符号匹配装置，压控振荡器（VCO），第一产品装置，第二产品装置，第三产品装置，第四产品装置，第一组合器，第二组合器和第五产品装置。该方法包括以下步骤：使用符号匹配装置从接收的扩频信号中解扩符号序列信号的同相分量和正交相位分量。第一和第二乘积装置分别将去扩展的同相分量乘以VCO余弦和VCO正弦信号，以产生第一和第二乘积信号。第三和第四乘积器件分别将解扩正交相位分量乘以VCO正弦和VCO余弦信号，以产生第三和第四乘积信号。第一组合器组合第一和第三乘积信号以产生第一组合信号。第二组合器组合第二和第四产品信号以产生第二组合信号。第五产品装置将第一和第二组合信号相乘以产生误差信号，响应于VCO调整正弦和余弦信号电平。

4. 发明授权

US5872808A Apparatus and method for synchronization of direct sequence CDMA signals 失效
标题翻译：直接序列CDMA信号同步的装置和方法
公开(公告)号：US5872808A
公开(公告)日：1999-02-16
申请号：US564007
申请日：1995-11-29
申请人： Sorin Davidovici , Emmanuel Kanterakis
发明人： Sorin Davidovici , Emmanuel Kanterakis
IPC分类号： H04B1/708 , H04B1/7093 , H04B7/005 , H04B1/69
CPC分类号： H04W52/221 , H04B1/7093 , H04W52/226 , H04W52/228 , H04B1/708 , H04W52/24
摘要： A spread-spectrum-matched-filter apparatus including a code generator, an in-phase-symbol-matched filter, a quadrature-phase-symbol-matched filter, an in-phase-frame-matched filter, a quadrature-phase-frame-matched filter, and a controller. The code generator generates replicas of a chip-sequence signal, which are used to set the symbol-impulse responses of the inphase-symbol-matched filter and the quadrature-phase-symbol matched filter. The in-phase-frame-matched filter and the quadrature-phase-frame-matched filter detect a despread-header-symbol-sequence signal and generate a maximum output signal which may be used as a data-start signal or for synchronizing the timing of the controller as to when to trigger sampling of the A/D converter, the output of the symbol-matched filters, detection of the data-symbol-sequence signal and other time-dependent processes.
摘要翻译：一种扩频匹配滤波器装置，包括码发生器，同相符号匹配滤波器，正交相位符号匹配滤波器，同相帧匹配滤波器，正交相位帧匹配的过滤器和控制器。代码生成器生成芯片序列信号的副本，其用于设置同相符号匹配滤波器和正交相位符号匹配滤波器的符号脉冲响应。同相帧匹配滤波器和正交相位帧匹配滤波器检测去扩展标题符号序列信号，并产生最大输出信号，其可以用作数据启动信号或同步定时控制器何时触发A / D转换器的采样，符号匹配滤波器的输出，数据符号序列信号的检测和其他时间依赖过程。

5. 发明授权

US5963583A Fuzzy-logic spread-spectrum adaptive power control 失效
标题翻译：模糊逻辑扩频自适应功率控制
公开(公告)号：US5963583A
公开(公告)日：1999-10-05
申请号：US7026
申请日：1998-01-14
申请人： Sorin Davidovici , Emmanuel Kanterakis
发明人： Sorin Davidovici , Emmanuel Kanterakis
IPC分类号： H04B1/707 , H04B7/005 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04W52/228 , H04B1/707 , Y02B60/50
摘要： A fuzzy-logic spread-spectrum adaptive power control system comprising a base station and a plurality of remote units. The base station receives a spread-spectrum signal, and samples the despread spread-spectrum signal at a peak correlation time of the data channel, and at a non-peak correlation time of the data channel. This in turn generates a signal level and a noise level, respectively. A signal-to-noise ratio calculator generates a signal-to-noise ratio from the signal level and the noise level. A fuzzy-logic controller compares the signal-to-noise ratio to a set of predetermined thresholds, and using a state machine, generates a control signal which is thereby transmitted to the remote unit, indicating the amount by which to increase or decrease transmitted power. Each remote unit demodulates the control signal, and a transmitter controller adjusts a power level of the remote-unit spread-spectrum transmitter.
摘要翻译：一种模糊逻辑扩频自适应功率控制系统，包括基站和多个远程单元。基站接收扩频信号，并在数据信道的峰值相关时间和数据信道的非峰值相关时间对解扩展频谱信号进行采样。这又分别产生信号电平和噪声电平。信噪比计算器从信号电平和噪声电平产生信噪比。模糊逻辑控制器将信噪比与一组预定阈值进行比较，并且使用状态机产生控制信号，由此发送到远程单元，指示增加或减少发射功率的量。每个远程单元解调控制信号，并且发射机控制器调整远程单元扩频发射机的功率电平。

6. 发明授权

US5742637A Fast phase estimation in digital communication systems 失效
标题翻译：数字通信系统中的快速相位估计
公开(公告)号：US5742637A
公开(公告)日：1998-04-21
申请号：US700012
申请日：1996-08-20
申请人： Emmanuel Kanterakis , Sorin Davidovici
发明人： Emmanuel Kanterakis , Sorin Davidovici
IPC分类号： H03D3/22 , H04B1/707 , H04B1/7085 , H04L27/00 , H04L27/233 , H04K1/00 , H04L27/22
CPC分类号： H04B1/7085 , H03D3/22 , H04B1/707 , H04L27/2332 , H04L2027/003 , H04L2027/0048
摘要： A system and method for synchronizing a Costas Loop for demodulating a received spread-spectrum signal using a squaring device, a filter, a phase detector, a phase unwrapping subsystem, an oscillator, a derotator and a decision device. Phase-shift-keying modulation is removed from a received spread-spectrum signal through squaring. An in-phase component and a quadrature-phase component of the received spread-spectrum signal are filtered to generate an arbitrary phase angle, .theta.(t). A value of .theta. proportional to .theta.(t) is then estimated. The estimated .theta. value is processed to obtain an estimate for the .phi. value, and a cosine and a sine of the estimated .phi. value are generated by the oscillator. The derotator derotates the in-phase-component and the quadrature-phase component of the received spread-spectrum signal with the cosine and the sine of the estimated .theta. value to generate a demodulated signal. The decision device evaluates the demodulated signal and outputs data.
摘要翻译：一种用于使用平方装置，滤波器，相位检测器，相位解包子系统，振荡器，解旋器和判定装置来解调接收的扩频信号的科斯塔斯环路的系统和方法。通过平方从接收的扩频信号中去除相移键控调制。对接收的扩频信号的同相分量和正交相位分量进行滤波以产生任意的相位角θ（t）。然后估计与theta（t）成比例的θ值。处理估计的θ值以获得phi值的估计，并且由振荡器产生估计的phi值的余弦和正弦。解旋器利用估计的θ值的余弦和正弦消除接收的扩频信号的同相分量和正交相位分量，以产生解调信号。判定装置评估解调信号并输出数据。

7. 发明授权

US06587452B1 High performance signal structure with multiple modulation formats 有权
标题翻译：具有多种调制格式的高性能信号结构
公开(公告)号：US06587452B1
公开(公告)日：2003-07-01
申请号：US09224722
申请日：1999-01-04
申请人： Sorin Davidovici , Emmanuel Kanterakis , Izumi Iida , Norio Hama , Nobuhiko Kenmochi
发明人： Sorin Davidovici , Emmanuel Kanterakis , Izumi Iida , Norio Hama , Nobuhiko Kenmochi
IPC分类号： H04Q728
CPC分类号： H03G3/3042 , H04W52/34
摘要： A mapping memory, for use with a transmitter, for mapping a first signal segment and a second signal segment of a packet so that each signal segment has the same average power level. Each signal segment is characterized by a different modulation format. The first signal segment might use BPSK, while the second signal segment might use QAM, having multiple amplitude levels.
摘要翻译：用于与发射机一起使用的映射存储器，用于映射分组的第一信号段和第二信号段，使得每个信号段具有相同的平均功率电平。每个信号段的特征在于不同的调制格式。第一信号段可以使用BPSK，而第二信号段可以使用具有多个幅度电平的QAM。

8. 发明授权

US06515981B1 Packet-switched spread-spectrum system 失效
标题翻译：分组交换扩频系统
公开(公告)号：US06515981B1
公开(公告)日：2003-02-04
申请号：US09466797
申请日：1999-12-20
申请人： Donald L. Schilling , Sorin Davidovici , Emmanuel Kanterakis , Michael Hennedy
发明人： Donald L. Schilling , Sorin Davidovici , Emmanuel Kanterakis , Michael Hennedy
IPC分类号： H04B7216
CPC分类号： H04B1/707 , H04J13/00 , H04J13/0022 , H04J13/10 , H04W12/02 , H04W88/02
摘要： A system and method for encoding and transmitting data with a spread-spectrum packet-switched system. Data to be transmitted by a packet transmitter are encoded for privacy and to restrict intelligent receipt of the data to the intended recipient. The encoded data is demultiplexed into sub-data-sequence signals which are spread-spectrum processed and then combined as a multichannel spread-spectrum signal. The multichannel spread-spectrum signal is concatenated with a header to output a packet-spread-spectrum signal which is transmitted over radio waves to a packet receiver. The packet receiver obtains timing for the multichannel spread-spectrum signal from the header. The multichannel spread-spectrum signal is then despread and multiplexed as received-encoded data. The received-encoded data is decoded by the intended recipient and stored in a receiver memory for output.
摘要翻译：一种利用扩频分组交换系统对数据进行编码和发送的系统和方法。由数据包发送器发送的数据被编码为隐私并且将数据的智能接收限制到预期的接收者。编码数据被解复用为子数据序列信号，其被扩频处理，然后被组合为多通道扩频信号。多信道扩频信号与报头相连，以将通过无线电波传输的分组扩展频谱信号输出到分组接收机。分组接收机从报头获得多信道扩频信号的定时。然后将多通道扩频信号解扩和复用为接收编码数据。接收编码的数据由预期接收者解码并存储在接收机存储器中用于输出。

9. 发明授权

US06212244B1 Fast response automatic gain control 失效
标题翻译：快速响应自动增益控制
公开(公告)号：US06212244B1
公开(公告)日：2001-04-03
申请号：US09005071
申请日：1998-01-09
申请人： Sorin Davidovici , Emmanuel Kanterakis , Izumi Iida , Norio Hama , Nobuhiko Kenmochi
发明人： Sorin Davidovici , Emmanuel Kanterakis , Izumi Iida , Norio Hama , Nobuhiko Kenmochi
IPC分类号： H04L2708
CPC分类号： H04W52/52 , H03G3/3052
摘要： A two-step automatic-gain-control (AGC) loop for use with a receiver. An AGC amplifier amplifies a received signal. From an output signal from the AGC amplifier, a received-signal-strength-indicator (RSSI) circuit generates an RSSI signal proportional to a received-signal-power level of the received signal. An RSSI-mapping circuit has an RSSI-mapping table. From the RSSI signal, the RSSI-mapping circuit, using the RSSI-mapping table, generates an AGC signal. An AGC-storing circuit stores the AGC signal. The AGC amplifier uses the stored-AGC signal to adjust the AGC gain. A converter circuit converts the output signal from the AGC amplifier to an in-phase component and a quadrature-phase component at a processing frequency. The error circuit determines an error signal from the in-phase component and the quadrature-phase component. When the error signal indicates the in-phase component and the quadrature-phase component are high, the integrate-and-dump circuit increments a counter of the integrate-and-dump circuit. When the error signal indicates the in-phase component and the quadrature-phase component are low, the integrate-and-dump circuit decrements the counter of the integrate-and-dump circuit. An AGC-convergence-rate multiplier normalizes an output of the integrate-and-dump circuit, thereby generating a normalized signal. The AGC-storing circuit updates the AGC signal from the normalized signal. From the updated AGC signal, the AGC circuit adjusts the AGC gain.
摘要翻译：用于接收机的两步自动增益控制（AGC）回路。 AGC放大器放大接收信号。从AGC放大器的输出信号，接收信号强度指示器（RSSI）电路产生与接收信号的接收信号功率电平成比例的RSSI信号。 RSSI映射电路具有RSSI映射表。根据RSSI信号，使用RSSI映射表的RSSI映射电路产生AGC信号。 AGC存储电路存储AGC信号。 AGC放大器使用存储的AGC信号来调整AGC增益。 A转换器电路将来自AGC放大器的输出信号以处理频率转换成同相分量和正交相分量。误差电路确定来自同相分量和正交相分量的误差信号。当误差信号表示同相分量且正交相位分量较高时，积分和转储电路会增加积分和转储电路的计数器。当误差信号表示同相分量并且正交相位分量低时，积分和转储电路使积分和转储电路的计数器递减。 AGC收敛速率乘法器对积分和转储电路的输出进行归一化，从而产生归一化信号。 AGC存储电路从归一化信号更新AGC信号。 AGC电路根据更新的AGC信号调整AGC增益。

10. 发明授权

US6154483A Coherent detection using matched filter enhanced spread spectrum demodulation 失效
标题翻译：使用匹配滤波器的相干检测增强扩频解调
公开(公告)号：US6154483A
公开(公告)日：2000-11-28
申请号：US842527
申请日：1997-04-07
申请人： Sorin Davidovici , Emmanuel Kanterakis , Donald L. Schilling
发明人： Sorin Davidovici , Emmanuel Kanterakis , Donald L. Schilling
IPC分类号： H04B1/7085 , H04B1/7093 , H04L27/00 , H04L27/227 , H04B15/00
CPC分类号： H04B1/7085 , H04B1/7093 , H04L27/2273 , H04L2027/0028 , H04L2027/0057
摘要： A spread-spectrum-phase-locked-loop apparatus and method for coherent detection without a pilot channel. The system comprises symbol-matched means, a voltage-controlled oscillator (VCO), a first product device, a second product device, a third product device, a fourth product device, a first combiner, a second combiner, and a fifth product device. The method comprises the steps of despreading, from a received spread-spectrum signal, an in-phase component and a quadrature-phase component of a symbol sequence signal using the symbol-matched means. The first and second product devices multiply the despread in-phase component by the VCO-cosine and the VCO-sine signals, respectively, to generate a first and a second product signal. The third and fourth product devices multiply the despread quadrature-phase component by the VCO-sine and the VCO-cosine signals, respectively, to generate a third and a fourth product signal. The first combiner combines the first and third product signals to generate a first combined signal. The second combiner combines the second and fourth product signals to generate a second combined signal. The fifth product device multiplies the first and second combined signals to generate an error signal, responsive to which the VCO adjusts the sine and cosine signal levels.
摘要翻译：一种用于没有导频信道的相干检测的扩频锁相环装置和方法。该系统包括符号匹配装置，压控振荡器（VCO），第一产品装置，第二产品装置，第三产品装置，第四产品装置，第一组合器，第二组合器和第五产品装置。该方法包括以下步骤：使用符号匹配装置从接收的扩频信号中解扩符号序列信号的同相分量和正交相位分量。第一和第二乘积装置分别将去扩展的同相分量乘以VCO余弦和VCO正弦信号，以产生第一和第二乘积信号。第三和第四乘积器件分别将解扩正交相位分量乘以VCO正弦和VCO余弦信号，以产生第三和第四乘积信号。第一组合器组合第一和第三产品信号以产生第一组合信号。第二组合器组合第二和第四产品信号以产生第二组合信号。第五产品装置将第一和第二组合信号相乘以产生误差信号，响应于VCO调整正弦和余弦信号电平。

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