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公开(公告)号：US08014724B2
公开(公告)日：2011-09-06
申请号：US10957043
申请日：2004-10-01
申请人： Shervin Moloudi
发明人： Shervin Moloudi
CPC分类号： H03H11/1291 , H03B21/01 , H03C3/0983 , H03H21/0001 , H03H21/0012 , H03H2011/0494 , H03J2200/10 , H03L7/0891 , H03L7/099 , H03L7/10 , H03L2207/06 , H04B1/40 , H04B17/104 , H04B17/14 , H04B17/19
摘要： Methods and systems for processing a signal with a corresponding noise profile are disclosed. Aspects of the method may comprise analyzing spectral content of the noise profile. At least one noise harmonic within the signal may be filtered based on said analyzed spectral content. The filtered signal may be limited. The noise profile may comprise a phase noise profile. The signal may comprise at least one of a sinusoidal signal and a noise signal. At least one filter coefficient that is used to filter said at least one noise harmonic may be determined. The filtering may comprise low pass filtering and the limiting may comprise hard-limiting the filtered signal. The signal may be modulated prior to the filtering. The signal may be downconverted prior to the modulating. At least one signal component of the signal may be downconverted.
摘要翻译： 公开了用于处理具有相应噪声分布的信号的方法和系统。 该方法的方面可以包括分析噪声分布的频谱内容。 可以基于所述分析的频谱内容来过滤信号内的至少一个噪声谐波。 滤波后的信号可能受到限制。 噪声分布可以包括相位噪声曲线。 信号可以包括正弦信号和噪声信号中的至少一个。 可以确定用于滤波所述至少一个噪声谐波的至少一个滤波器系数。 滤波可以包括低通滤波，并且限制可以包括硬限幅滤波信号。 信号可以在滤波之前进行调制。 信号可以在调制之前进行下变频。 信号的至少一个信号分量可以被下变频。
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公开(公告)号：US07548593B2
公开(公告)日：2009-06-16
申请号：US11228090
申请日：2005-09-15
IPC分类号： H03C3/00
CPC分类号： H04L27/361 , H03C3/0966 , H03C3/0983
摘要： A phase modulator faithfully reproduces higher frequency modulation using an offset phase-locked loop (OPLL) without passing excessive noise through an increased bandwidth of the OPLL. A quadrature modulator modulates information from a baseband signal onto a passband IF signal and, after a limiter strips away amplitude variations, the OPLL reproduces the phase modulation on an RF signal. The OPLL introduces a group delay that does not vary linearly with the modulation frequency and that consequently causes distortion when uncompensated. A baseband filter filters the amplitude of the baseband signal and introduces a complementary group delay that compensates for the OPLL group delay and results in a combined group delay of the baseband filter, quadrature modulator, limiter and OPLL that remains substantially constant as modulation frequency varies. Compensating for the OPLL group delay reduces distortion and the spectral energy at offset frequencies from the carrier frequency of the RF signal.
摘要翻译： 相位调制器使用偏移锁相环（OPLL）忠实地再现更高的频率调制，而不会通过OPLL的带宽增加而过多的噪声。 正交调制器将信号从基带信号调制到通带IF信号上，并且在限幅器剥离幅度变化之后，OPLL再现RF信号上的相位调制。 OPLL引入了不随调制频率线性变化的群延迟，从而导致无补偿时的失真。 基带滤波器对基带信号的幅度进行滤波，并引入补偿组延迟，补偿OPLL组延迟，并导致基带滤波器，正交调制器，限幅器和OPLL的组合群延迟，其随调制频率变化而保持基本恒定。 补偿OPLL组延迟可以减少偏移频率下的失真和频谱能量与RF信号的载波频率。
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3.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：US20050275481A1
公开(公告)日：2005-12-15
申请号：US10939587
申请日：2004-09-13
申请人： Christian Grewing , Markus Hammes , Andre Hanke , Stefan Waasen
发明人： Christian Grewing , Markus Hammes , Andre Hanke , Stefan Waasen
CPC分类号： H03C3/0983 , H03C3/0925 , H03C3/0933 , H03C3/40
摘要： A transmission arrangement includes a step-up frequency mixer that converts a modulation signal to a transmission frequency. The step-up frequency mixer is arranged within a phase locked loop that further comprises a frequency divider that is likewise supplied with the modulation data, combined with channel pre-selection data, for the purposes of compensation. This arrangement prevents low-frequency components of the modulation signal from being eliminated by the phase locked loop. In addition, noise components and undesirable interference frequency components that are produced in the mixer are suppressed by the phase locked loop.
摘要翻译： 传输装置包括将调制信号转换为传输频率的升压混频器。 升压型混频器被布置在锁相环内，该锁相环还包括分频器，该分频器同样被提供调制数据，与通道预选数据相结合，用于补偿。 这种布置防止了调制信号的低频分量被锁相环消除。 此外，在混频器中产生的噪声分量和不期望的干扰频率分量被锁相环抑制。
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公开(公告)号：US06952569B2
公开(公告)日：2005-10-04
申请号：US10370585
申请日：2003-02-24
申请人： Morten Damgaard , Rahul Magoon
发明人： Morten Damgaard , Rahul Magoon
CPC分类号： H03C3/0983 , H03C3/0966 , H03L7/1806 , H03L7/185 , H04L2027/0016 , H04L2027/0018
摘要： A transmitter for a wireless handset having a modified translation loop architecture. The transmitter includes a VCO that generates a modulated transmit signal having a frequency fTx, and a modulated signal source that generates a modulated LO signal with a frequency fLO. A mixer mixes the transmit signal with the LO signal to produce an IF signal having a frequency fIF. A first divider divides the LO signal frequency fLO by an integer M to generate a first comparison signal having a frequency fCF. A second divider divides the IF signal frequency fIF, after it is multiplied by an integer K, by an integer N to generate a second comparison signal having a frequency fCF. The transmit and LO signal frequencies have the relationship f Tx = f LO KM ± N M . A phase detector coupled to the first and second comparison signals compares the phases of the signals and outputs a control voltage to the VCO proportional to any phase differences between the signals.
摘要翻译： 一种用于具有修改的平移环结构的无线手机的发射机。 发射机包括产生具有频率f Tx的调制的发射信号的VCO和产生具有频率为LO LO的调制LO信号的调制信号源。 混合器将发送信号与LO信号混合以产生具有频率f IF IF的IF信号。 第一分频器将LO信号频率f LO LO分频整数M以产生具有频率f CF1的第一比较信号。 第二分频器将IF信号频率f IF IF在乘以整数K之后除以整数N，以产生具有频率f CF1的第二比较信号。 发送和LO信号频率具有关系
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公开(公告)号：US06898257B2
公开(公告)日：2005-05-24
申请号：US09788900
申请日：2001-02-20
申请人： Georg Fischer , Volker Riemann
发明人： Georg Fischer , Volker Riemann
CPC分类号： H03C3/0991 , H03C3/08 , H03C3/0925 , H03C3/0941 , H03C3/0966 , H03C3/0983 , H04B2001/0491 , H04L27/2017
摘要： The invention relates, inter alia, to a transmitter device, in particular for a base transceiver station in a mobile radio system, which has a digital modulator for making available a signal containing a phase information, and a modulation closed loop having a digital phase comparator operating at baseband whose first input is connected to the output of the digital modulator. In addition, a controllable oscillator is provided for generating an RF transmission signal at a controllable transmission frequency, a device which is assigned to the controllable oscillator and has the purpose of converting the RF transmission signal into a baseband signal containing a phase information. The output of the converter device is connected to a second input of the digital phase comparator.A GSM transmitter which has such a modulation closed loop exhibits, in terms of its out-band noise and interference characteristics, significantly improved properties in comparison with a GSM transmitter which does not include a modulation loop.
摘要翻译： 本发明尤其涉及一种发射机设备，特别是涉及一种移动无线电系统中的基站收发信机，其具有用于提供包含相位信息的信号的数字调制器和具有数字相位比较器的调制闭环 在基带处工作，其第一输入连接到数字调制器的输出端。 此外，提供可控制的振荡器，用于以可控的传输频率产生RF传输信号，分配给可控振荡器的装置，并且其目的是将RF传输信号转换成包含相位信息的基带信号。 转换器装置的输出连接到数字相位比较器的第二输入端。 与不包括调制环路的GSM发射机相比，具有这种调制闭环的GSM发射机在其带外噪声和干扰特性方面表现出显着改善的特性。
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公开(公告)号：US06754474B1
公开(公告)日：2004-06-22
申请号：US09621815
申请日：2000-07-21
IPC分类号： H04B104
CPC分类号： H03C3/0983 , H03C3/0933 , H03C3/0975 , H03L7/1974 , H04B1/408 , H04L27/2017
摘要： In a transmission system, a modulator and a fractional frequency divider are introduced into the control loop of a voltage-controlled oscillator. It is shown that the benefit of this is a reduction in noise associated with the reduction of noise due to using a divider with a lower division coefficient. In one embodiment, the fractional divider is obtained by selecting different dividers in turn in accordance with temporal proportions corresponding to a required division fraction.
摘要翻译： 在传输系统中，调制器和分数分频器被引入到压控振荡器的控制环路中。 显示出这样的益处是由于使用具有较低分频系数的分频器而与降低噪声相关联的噪声的降低。 在一个实施例中，通过根据对应于所需分割分数的时间比例依次选择不同的分频器来获得分数分频器。
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8.发明申请公开(公告)号：US20030227342A1
公开(公告)日：2003-12-11
申请号：US10386352
申请日：2003-03-10
发明人： Dongtai Liu
IPC分类号： H03C003/38
CPC分类号： H03C3/0983 , H03C3/0966
摘要： A phase-amplitude modulator for mobile communications employs a phase lock loop as an input to a nonlinear power amplifier providing phase information with amplitude information used to modulate the power amplifier output to synthesize phase-amplitude for the RF transmission signal.
摘要翻译： 用于移动通信的相位幅度调制器采用锁相环作为非线性功率放大器的输入，提供具有用于调制功率放大器输出以合成RF发射信号的相位幅度的幅度信息的相位信息。
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公开(公告)号：US06643499B1
公开(公告)日：2003-11-04
申请号：US09603741
申请日：2000-06-26
申请人： Pascal Audinot , Andrew M. Henwood
发明人： Pascal Audinot , Andrew M. Henwood
IPC分类号： H04B106
CPC分类号： H03C3/0983 , H03C3/0966 , H03L7/18 , H03L7/185
摘要： A first and second phase-locked loop each having their frequency of operation under programmable control by changing the divider ratio. A single programming word contains the divider ratio for the first phase-locked loop and addressing bits which address a plurality of auxiliary registers for changing the divider ratio of the second phase-locked loop. In a cellular telephone, this allows the digital signal processor to change from receive to transmit mode or from one transmit mode or from one frequency to another utilizing a single command word.
摘要翻译： 第一和第二锁相环，通过改变分频比，每个具有可编程控制的操作频率。 单个编程字包含第一锁相环的分频比和寻址多个辅助寄存器的寻址位，用于改变第二锁相环的分频比。 在蜂窝电话中，这允许数字信号处理器使用单个命令字从接收模式或发送模式或从一种频率改变到另一个。
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公开(公告)号：US20030153286A1
公开(公告)日：2003-08-14
申请号：US10071919
申请日：2002-02-08
发明人： Biagio Bisanti , Stefano Cipriani , Eric Duvivier
IPC分类号： H04B001/04
CPC分类号： H03C3/0983 , H03C3/0966
摘要： A transmitter architecture (200) provides for a stable and low noise modulator where the modulation bandwidth is uncorrelated to the TX loop bandwidth. The output signal (228) of the TX loop is demodulated by a demodulator (208) and the demodulated signal is compared by a comparator (206) with the modulating input signal (202). The output of the comparator is then used to adjust a digital pre-emphasis filter (204) which preconditions the modulating input signal (202) in the digital domain. The preconditioning approach of the present invention provides for low noise because the transmitter designer can chose a narrow band for the TX loop which will also filter out the noise coming from the additional synthesizer (226) used to down convert the input signal.
摘要翻译： 发射机架构（200）提供稳定和低噪声调制器，其中调制带宽与TX环路带宽不相关。 TX环路的输出信号（228）由解调器（208）解调，并且解调信号由比较器（206）与调制输入信号（202）进行比较。 然后比较器的输出用于调整预编码数字域中的调制输入信号（202）的数字预加重滤波器（204）。 本发明的预处理方法提供低噪声，因为发射机设计者可以为TX环路选择窄带，其也将滤除来自用于下变频输入信号的附加合成器（226）的噪声。
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