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公开(公告)号：US5579347A
公开(公告)日：1996-11-26
申请号：US365037
申请日：1994-12-28
IPC分类号： H04L27/38 , H03D3/00 , H04B1/10 , H04B1/22 , H04B1/26 , H04B1/30 , H04L27/14 , H04L27/227 , H04L27/233 , H03D1/22 , H04B1/12
CPC分类号： H03D3/009 , H04B1/30 , H04L27/2275 , H04L27/2332
摘要： A digitally compensated direct-conversion receiver includes devices for generating digital samples of a base-band in-phase signal and a base-band quadrature signal and for detecting the presence of a second-order product signal produced by an amplitude-modulated interfering signal. Also, the apparatus comprises a device for digitally compensating the digital samples by removing the second-order product signal, thereby producing compensated digital samples. In one method of digitally compensating samples of an information signal quadrature-modulating a carrier signal, estimated samples of a second-order product from a switched carrier signal are formed by averaging the digital samples during two time periods and by determining a time of ramps in the in-phase and quadrature signals that occur between the time periods due to the interfering signal. The digital samples may be differentiated and the results smoothed in determining the time of the ramps. In another apparatus, the estimated samples of the second-order product signal are produced by a device for averaging a square of a difference between respective digital samples of the in-phase signal and the quadrature signal, thereby determining an amplitude of the amplitude-modulated carrier signal, and a device for combining the amplitude and the digital samples, thereby generating the estimated samples.
摘要翻译： 数字补偿直接转换接收机包括用于产生基带同相信号和基带正交信号的数字样本的装置，并用于检测由幅度调制的干扰信号产生的二阶乘积信号的存在。 此外，该装置包括一个用于通过去除二阶乘积信号对数字样本进行数字补偿从而产生经补偿的数字样本的装置。 在对对载波信号进行正交调制的信息信号的样本进行数字补偿的一种方法中，通过在两个时间段期间对数字样本进行平均并且通过确定在两个时间段内的斜坡时间来形成来自切换载波信号的二阶乘积的估计样本 由于干扰信号在时间周期之间发生的同相和正交信号。 可以区分数字样本，并且在确定斜坡的时间时平滑结果。 在另一装置中，二阶乘积信号的估计样本由用于对同相信号和正交信号的相应数字样本之间的差的平方进行平均的装置产生，由此确定幅度调制的幅度 载波信号和用于组合幅度和数字样本的装置，由此产生估计样本。
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公开(公告)号：US6029052A
公开(公告)日：2000-02-22
申请号：US886244
申请日：1997-07-01
申请人： Martin Isberg , Bjorn Lindquist , Peter Jakobsson , Jan Celander , Kjell Gustafsson , Lars-Peter Kunkel , Torsten Carlsson , Jacob Mannerstr.ang.le
发明人： Martin Isberg , Bjorn Lindquist , Peter Jakobsson , Jan Celander , Kjell Gustafsson , Lars-Peter Kunkel , Torsten Carlsson , Jacob Mannerstr.ang.le
摘要： A multiple-mode receiver incorporating direct conversion (processing received signals using intermediate frequencies within the same frequency range as the received signal bandwidth) rather than superheterodyne circuitry, allowing receiver hardware components to be re-used rather than replicated for each band. Various embodiments are disclosed in which low pass filters, mixers, quadrature generators, oscillators, and amplifiers are re-used.
摘要翻译： 包括直接转换的多模式接收机（处理使用与接收信号带宽相同的频率范围内的中频）的接收信号，而不是超外差电路，允许重复使用接收机硬件组件而不是复制每个频带。 公开了各种实施例，其中重新使用低通滤波器，混频器，正交发生器，振荡器和放大器。
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公开(公告)号：US6091963A
公开(公告)日：2000-07-18
申请号：US6867
申请日：1998-01-14
申请人： Jacob Mannerstr.ang.le , Martin Isberg , Bjorn Lindquist , Torsten Carlsson , Hans Hagberg , Peter Jakobsson , Lars Kunkel , Kjell Gustafsson
发明人： Jacob Mannerstr.ang.le , Martin Isberg , Bjorn Lindquist , Torsten Carlsson , Hans Hagberg , Peter Jakobsson , Lars Kunkel , Kjell Gustafsson
CPC分类号： H04B1/0057 , H03D3/007 , H04B1/005 , H04B1/406
摘要： The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occurring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occurring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.
摘要翻译： 本发明涉及一种接收机设备，包括适于接收两个频带（FB1，FB2）中的无线电信号的接收机（104）。 一个频带（FB1）中的无线电信号构成具有一定信道间隔的无线电系统（AMPS，NMT）的通信信号，而第二频带（FB2）的无线电信号构成用于第二无线电系统 （PCS1900，DCS1800，GSM）具有第二特定信道间隔。 接收器（104）包括两个输入端（108,11），每个输入端用于具有不同频带和信道间隔的无线电系统。 对于在一个输入（108）上发生的无线电信号，从RF范围直接到基带频率范围进行混频。 对于在第二输入（108）上发生的无线电信号，通过中频范围执行从射频范围到基带频率范围的混合。 此外，接收器（104）包括旨在为两个无线电系统传送基带信号的输出（112）。 输出（112）连接到无线电系统共用的基带单元。 在基带单元中，对已经混合到基带频率范围的接收无线电信号执行低通滤波，检测和相邻信道抑制。
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4.发明授权公开(公告)号：US07409192B2
公开(公告)日：2008-08-05
申请号：US11186380
申请日：2005-07-21
申请人： Frank Lombardi , John G. Freed , Martin Isberg
发明人： Frank Lombardi , John G. Freed , Martin Isberg
IPC分类号： H04B1/04
CPC分类号： H04B1/30 , H03C3/0966 , H03C3/0983 , H03C5/00 , H03L7/185 , H03L7/1974 , H03L7/23
摘要： A method and apparatus for direct-conversion transmission generates a first frequency signal that is non-harmonically related to a transmit frequency signal, divides the first frequency signal to obtain a mixing frequency signal, divides the first frequency signal to obtain an intermediate frequency reference signal, generates the transmit frequency signal by using the mixing frequency signal to downconvert the transmit frequency signal into an intermediate frequency feedback signal, and phase-locks the intermediate frequency feedback signal to the intermediate frequency reference signal. The transmit frequency signal may be phase modulated, and may serve as an input to a saturated-mode power amplifier that can be configured for corresponding amplitude modulation. Alternatively, the un-modulated transmit frequency signal serves as the carrier signal input to a quadrature modulator, which imparts I/Q modulations to it, thereby producing a modulated carrier signal for input to a linear power amplifier.
摘要翻译： 用于直接转换传输的方法和装置产生与发射频率信号非谐波相关的第一频率信号，分频第一频率信号以获得混频信号，分频第一频率信号以获得中频参考信号 通过使用混频信号来生成发送频率信号，以将发送频率信号下变频成中频反馈信号，并将中频反馈信号相位锁定到中频参考信号。 发射频率信号可以是相位调制的，并且可以用作可以被配置用于对应的幅度调制的饱和模式功率放大器的输入。 或者，未调制的发送频率信号用作输入到正交调制器的载波信号，其向其施加I / Q调制，从而产生用于输入到线性功率放大器的调制载波信号。
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公开(公告)号：US09048978B2
公开(公告)日：2015-06-02
申请号：US13809234
申请日：2011-07-05
申请人： Martin Isberg
发明人： Martin Isberg
CPC分类号： H04L7/0016 , H03J7/065
摘要： The invention relates to a method and a system for generating clock signals in a wireless communication device. The method includes generating an uncorrected reference clock signal, generating at least one frequency correction value corresponding to a frequency error in the uncorrected reference clock signal, and generating at least one radio frequency clock signal based on the uncorrected clock signal and the at least one frequency correction value, for receiving and transmitting radio frequency signals. The method further comprise generating, independently of the at least one radio frequency clock signal, a baseband timing signal based on the uncorrected reference clock signal and the at least one frequency correction value, for clocking base-band signal processing circuits.
摘要翻译： 本发明涉及一种用于在无线通信设备中产生时钟信号的方法和系统。 该方法包括产生未校正的参考时钟信号，产生对应于未校正参考时钟信号中的频率误差的至少一个频率校正值，以及基于未校正的时钟信号和至少一个频率产生至少一个射频时钟信号 校正值，用于接收和发射射频信号。 所述方法还包括：基于所述未校正参考时钟信号和所述至少一个频率校正值，独立于所述至少一个射频时钟信号产生基带定时信号，用于对基带信号处理电路进行计时。
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公开(公告)号：US06621876B2
公开(公告)日：2003-09-16
申请号：US09797346
申请日：2001-03-01
IPC分类号： H04L2720
CPC分类号： H04L27/367
摘要： A signal source generates a phase-modulated output signal responsive to a phase-modulation signal. A phase splitter splits the phase-modulated output signal into two or more phase-offset output signals. A switch provides a selected one of the phase-offset output signals from the phase splitter to a transmit amplifier circuit. Large phase transitions in the phase-modulation signal are detected and reduced to decrease modulation bandwidth requirements at the signal source. When a phase transition in the phase-modulation signal is reduced, the switch is coherently switched from one phase-offset output signal to another to substantially restore the full phase transition in the output signal presented to the transmit amplifier circuit. In this manner, the transmit amplifier receives substantially the same phase transitions as are in the original phase-modulation signal.
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公开(公告)号：US06483335B1
公开(公告)日：2002-11-19
申请号：US09614583
申请日：2000-07-12
申请人： Martin Isberg
发明人： Martin Isberg
IPC分类号： G01R3102
CPC分类号： H01L23/544 , H01L2223/54433 , H01L2223/5444 , H01L2924/0002 , H01L2924/00
摘要： A technique for identifying circuits within an electrical device is disclosed. In one embodiment, additional current sink paths are associated with one or more circuits within the electrical device and measurements of additional current drawn by the current sink paths can be used to identify the associated circuit. In an additional embodiment, a special mode of operation is implemented in the electrical device where the circuit to be identified outputs identity signals in response to control signals from a controller. In a further embodiment, a shift register is activated in the special mode of operation to serially output an identity word in response to the control signals from the controller.
摘要翻译： 公开了一种用于识别电气设备内的电路的技术。 在一个实施例中，额外的电流接收器路径与电气设备内的一个或多个电路相关联，并且可以使用当前接收器路径所绘制的附加电流的测量结果来识别相关联的电路。 在另外的实施例中，在电气设备中实现特殊操作模式，其中要识别的电路响应于来自控制器的控制信号输出身份信号。 在另一实施例中，移位寄存器在特殊操作模式下被激活，以响应于来自控制器的控制信号串行输出标识字。
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公开(公告)号：US20130208839A1
公开(公告)日：2013-08-15
申请号：US13809234
申请日：2011-07-05
申请人： Martin Isberg
发明人： Martin Isberg
IPC分类号： H04L7/00
CPC分类号： H04L7/0016 , H03J7/065
摘要： The invention relates to a method and a system for generating clock signals in a wireless communication device. The method includes generating an uncorrected reference clock signal, generating at least one frequency correction value corresponding to a frequency error in the uncorrected reference clock signal, and generating at least one radio frequency clock signal based on the uncorrected clock signal and the at least one frequency correction value, for receiving and transmitting radio frequency signals. The method further comprise generating, independently of the at least one radio frequency clock signal, a baseband timing signal based on the uncorrected reference clock signal and the at least one frequency correction value, for clocking base-band signal processing circuits.
摘要翻译： 本发明涉及一种用于在无线通信设备中产生时钟信号的方法和系统。 该方法包括产生未校正的参考时钟信号，产生对应于未校正参考时钟信号中的频率误差的至少一个频率校正值，以及基于未校正的时钟信号和至少一个频率产生至少一个射频时钟信号 校正值，用于接收和发射射频信号。 所述方法还包括：基于所述未校正参考时钟信号和所述至少一个频率校正值，独立于所述至少一个射频时钟信号产生基带定时信号，用于对基带信号处理电路进行计时。
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公开(公告)号：US5530929A
公开(公告)日：1996-06-25
申请号：US303183
申请日：1994-09-08
申请人： Bjorn Lindqvist , Martin Isberg
发明人： Bjorn Lindqvist , Martin Isberg
CPC分类号： H03D1/2245 , H04B1/30
摘要： A method and a device in a homodyne receiver including a local oscillator generating an oscillator signal at a frequency of f.sub.LO, a mixer, and a reception device for receiving an input signal having a frequency of f.sub.RF, the oscillator signal and the input signal being supplied to the mixer. The oscillator signal is supplied to a first processing unit to produce a first output signal having a frequency of M*f.sub.LO, where M is an integer value. The first output signal is supplied to a second processing unit to produce a second output signal having a frequency of M*f.sub.LO /N=f.sub.LO, where N is an integer number and M.noteq.N, and the mixer and the second processing unit are integrated to minimize leakage of signals being supplied to the mixer from the second processing unit.
摘要翻译： 一种在零差接收机中的方法和装置，包括以fLO频率产生振荡器信号的本地振荡器，混频器和用于接收具有fRF频率的输入信号的接收装置，提供振荡器信号和输入信号 到搅拌机。 振荡器信号被提供给第一处理单元以产生具有M * fLO频率的第一输出信号，其中M是整数值。 第一输出信号被提供给第二处理单元以产生频率为M * fLO / N = fLO的第二输出信号，其中N是整数和M NOTEQUAL N，并且混频器和第二处理单元被集成 以最小化从第二处理单元提供给混合器的信号的泄漏。
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10.发明申请公开(公告)号：US20070019109A1
公开(公告)日：2007-01-25
申请号：US11186380
申请日：2005-07-21
申请人： Frank Lombardi , John Freed , Martin Isberg
发明人： Frank Lombardi , John Freed , Martin Isberg
IPC分类号： H03L7/00
CPC分类号： H04B1/30 , H03C3/0966 , H03C3/0983 , H03C5/00 , H03L7/185 , H03L7/1974 , H03L7/23
摘要： A method and apparatus for direct-conversion transmission generates a first frequency signal that is non-harmonically related to a transmit frequency signal, divides the first frequency signal to obtain a mixing frequency signal, divides the first frequency signal to obtain an intermediate frequency reference signal, generates the transmit frequency signal by using the mixing frequency signal to downconvert the transmit frequency signal into an intermediate frequency feedback signal, and phase-locks the intermediate frequency feedback signal to the intermediate frequency reference signal. The transmit frequency signal may be phase modulated, and may serve as an input to a saturated-mode power amplifier that can be configured for corresponding amplitude modulation. Alternatively, the un-modulated transmit frequency signal serves as the carrier signal input to a quadrature modulator, which imparts I/Q modulations to it, thereby producing a modulated carrier signal for input to a linear power amplifier.
摘要翻译： 用于直接转换传输的方法和装置产生与发射频率信号非谐波相关的第一频率信号，分频第一频率信号以获得混频信号，分频第一频率信号以获得中频参考信号 通过使用混频信号来生成发送频率信号，以将发送频率信号下变频成中频反馈信号，并将中频反馈信号相位锁定到中频参考信号。 发射频率信号可以是相位调制的，并且可以用作可以被配置用于对应的幅度调制的饱和模式功率放大器的输入。 或者，未调制的发送频率信号用作输入到正交调制器的载波信号，其向其施加I / Q调制，从而产生用于输入到线性功率放大器的调制载波信号。
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