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1. 发明授权

US08014476B2 Wireless device with a non-compensated crystal oscillator 有权
标题翻译：带无补偿晶体振荡器的无线设备
公开(公告)号：US08014476B2
公开(公告)日：2011-09-06
申请号：US11269360
申请日：2005-11-07
申请人： Daniel F. Filipovic , Charles J. Persico , Christopher C. Riddle
发明人： Daniel F. Filipovic , Charles J. Persico , Christopher C. Riddle
IPC分类号： H04L27/06
CPC分类号： H04B1/38 , H03J7/10 , H03J2200/01 , H03J2200/10 , H04L27/2332 , H04L2027/0036 , H04L2027/0055 , H04L2027/0065 , H04L2027/0087
摘要： A wireless device achieves good performance using a crystal oscillator that is not compensated for temperature. The crystal oscillator provides a reference signal having a temperature dependent frequency error. A control unit estimates the frequency error (e.g., based on a received pilot) and provides a frequency error estimate. A clock generator generates a digital clock, which tracks chip timing, based on the reference signal and the frequency error estimate. A receiver frequency downconverts an input RF signal with a receive LO signal having the frequency error and provides an analog baseband signal. An ADC digitizes the analog baseband signal based on a sampling clock having the frequency error and provides ADC samples. A re-clocking circuit re-clocks the ADC samples based on a digital clock and provides data samples. A digital rotator frequency translates the data samples based on the frequency error estimate and provides frequency-translated samples centered near DC.
摘要翻译：无线设备使用不补偿温度的晶体振荡器实现良好的性能。晶体振荡器提供具有温度相关频率误差的参考信号。控制单元估计频率误差（例如，基于接收到的导频）并提供频率误差估计。时钟发生器基于参考信号和频率误差估计器产生跟踪芯片定时的数字时钟。接收机使用具有频率误差的接收LO信号对输入RF信号进行下变频并提供模拟基带信号。 ADC根据具有频率误差的采样时钟数字化模拟基带信号，并提供ADC采样。重新计时电路根据数字时钟对ADC采样进行重新计时，并提供数据采样。数字旋转器频率基于频率误差估计来转换数据样本，并提供以DC为中心的频率转换样本。

2. 发明授权

US07912438B2 Method and apparatus for mitigating phase noise 有权
标题翻译：降低相位噪声的方法和装置
公开(公告)号：US07912438B2
公开(公告)日：2011-03-22
申请号：US11688314
申请日：2007-03-20
申请人： Daniel F. Filipovic , Charles J. Persico
发明人： Daniel F. Filipovic , Charles J. Persico
IPC分类号： H04B1/10 , H04B17/00
CPC分类号： H04B15/06
摘要： Techniques for mitigating additional phase noise in local oscillator (LO) signals, which may be due to digital noise coupling, are described. A correction signal having an estimate of additional phase noise in an LO signal is derived. The correction signal is applied to a data signal either after downconversion or before upconversion with the LO signal to mitigate the additional phase noise. To derive the correction signal, an input signal having the additional phase noise may be obtained by downconverting a replica LO signal or based on the replica LO signal without downconversion. The input signal may be digitized and filtered to pass a single tone and suppress remaining tones. A replica signal may be derived based on the filtered signal and frequency translated to obtain a phase noise estimate signal at DC. The complex conjugate of the phase noise estimate signal may be provided as the correction signal.
摘要翻译：描述了用于减轻本地振荡器（LO）信号中的附加相位噪声的技术，这可能是由于数字噪声耦合引起的。导出具有LO信号中附加相位噪声的估计的校正信号。校正信号在下转换之后或在LO信号上变频之前被施加到数据信号，以减轻额外的相位噪声。为了导出校正信号，具有附加相位噪声的输入信号可以通过下变频复制LO信号或者基于复制LO信号而不进行下变频来获得。输入信号可以被数字化并被滤波以通过单个音调并抑制剩余音调。可以基于经滤波的信号和频率转换复制信号，以在DC处获得相位噪声估计信号。可以提供相位噪声估计信号的复共轭作为校正信号。

3. 发明申请

US20080232611A1 METHOD AND APPARATUS FOR MITIGATING PHASE NOISE 有权
标题翻译：减少相位噪声的方法和装置
公开(公告)号：US20080232611A1
公开(公告)日：2008-09-25
申请号：US11688314
申请日：2007-03-20
申请人： Daniel F. Filipovic , Charles J. Persico
发明人： Daniel F. Filipovic , Charles J. Persico
IPC分类号： H04B15/00
CPC分类号： H04B15/06
摘要： Techniques for mitigating additional phase noise in local oscillator (LO) signals, which may be due to digital noise coupling, are described. A correction signal having an estimate of additional phase noise in an LO signal is derived. The correction signal is applied to a data signal either after downconversion or before upconversion with the LO signal to mitigate the additional phase noise. To derive the correction signal, an input signal having the additional phase noise may be obtained by downconverting a replica LO signal or based on the replica LO signal without downconversion. The input signal may be digitized and filtered to pass a single tone and suppress remaining tones. A replica signal may be derived based on the filtered signal and frequency translated to obtain a phase noise estimate signal at DC. The complex conjugate of the phase noise estimate signal may be provided as the correction signal.
摘要翻译：描述了用于减轻本地振荡器（LO）信号中的附加相位噪声的技术，这可能是由于数字噪声耦合引起的。导出具有LO信号中附加相位噪声的估计的校正信号。校正信号在下转换之后或在LO信号上变频之前被施加到数据信号，以减轻额外的相位噪声。为了导出校正信号，具有附加相位噪声的输入信号可以通过下变频复制LO信号或者基于复制LO信号而不进行下变频来获得。输入信号可以被数字化并被滤波以通过单个音调并抑制剩余音调。可以基于经滤波的信号和频率转换复制信号，以在DC处获得相位噪声估计信号。可以提供相位噪声估计信号的复共轭作为校正信号。

4. 发明申请

US20110244912A1 METHOD AND APPARATUS FOR MAXIMUM RATIO TRANSMISSION MOBILE TRANSMIT DIVERSITY SYSTEM 有权
标题翻译：用于最大比例传输移动传输多样性系统的方法和装置
公开(公告)号：US20110244912A1
公开(公告)日：2011-10-06
申请号：US12950043
申请日：2010-11-19
申请人： Daniel F. Filipovic , Chengjin Zhang
发明人： Daniel F. Filipovic , Chengjin Zhang
IPC分类号： H04B7/00
CPC分类号： H04B7/0443 , H04B7/0617
摘要： A method and apparatus for providing maximum ratio transmission mobile transmit diversity is provided. The method may include selecting a first transmit power for a first antenna and a second transmit power for a second antenna, wherein the first and second transmit powers are selected to generate a target power output, and using a first average power tracking unit to generate the first selected transmit power and a second average power tracking unit to generate the second selected transmit power.
摘要翻译：提供了一种用于提供最大比率传输移动发射分集的方法和装置。该方法可以包括为第一天线选择第一发射功率和第二天线的第二发射功率，其中选择第一和第二发射功率以产生目标功率输出，并且使用第一平均功率跟踪单元来产生第一选择的发射功率和第二平均功率跟踪单元以产生第二选择的发射功率。

5. 发明申请

US20100310031A1 MULTI-RATE DIGITAL PHASE LOCKED LOOP 有权
标题翻译：多速数字锁相环
公开(公告)号：US20100310031A1
公开(公告)日：2010-12-09
申请号：US12478506
申请日：2009-06-04
申请人： Gary John Ballantyne , Jifeng Geng , Daniel F. Filipovic
发明人： Gary John Ballantyne , Jifeng Geng , Daniel F. Filipovic
IPC分类号： H03D3/24
CPC分类号： H03L7/08 , H03C3/0941 , H03C3/095 , H03C3/0966 , H03L2207/50
摘要： A Digital Phase-Locked Loop (DPLL) involves a Time-to-Digital Converter (TDC) that receives a DCO output signal and a reference clock and outputs a first stream of digital values. Quantization noise is reduced by clocking the TDC at a high rate. Downsampling circuitry converts the first stream into a second stream. The second stream is supplied to a phase detecting summer of the DPLL such that a control portion of the DPLL can switch at a lower rate to reduce power consumption. The DPLL is therefore referred to as a multi-rate DPLL. A third stream of digital tuning words output by the control portion is upsampled before being supplied to the DCO so that the DCO can be clocked at the higher rate, thereby reducing digital images. In a receiver application, no upsampling is performed and the DCO is clocked at the lower rate, thereby further reducing power consumption.
摘要翻译：数字锁相环（DPLL）涉及一个时间数字转换器（TDC），它接收DCO输出信号和参考时钟并输出第一个数字值。通过以较高的速率计时TDC来减少量化噪声。下采样电路将第一流转换为第二流。第二流被提供给DPLL的相位检测加法器，使得DPLL的控制部分可以以较低的速率切换以降低功耗。因此，DPLL被称为多速率DPLL。由控制部分输出的第三个数字调谐字流在被提供给DCO之前被上采样，从而可以以更高的速率计时DCO，从而减少数字图像。在接收机应用中，不执行上采样，并且以较低的速率对DCO进行计时，从而进一步降低功耗。

6. 发明申请

US20100277211A1 DIGITAL PHASE-LOCKED LOOP WITH TWO-POINT MODULATION USING AN ACCUMULATOR AND A PHASE-TO-DIGITAL CONVERTER 有权
标题翻译：使用累加器和相数转换器进行两点调制的数字锁相环
公开(公告)号：US20100277211A1
公开(公告)日：2010-11-04
申请号：US12432468
申请日：2009-04-29
申请人： Jifeng Geng , Gary J. Ballantyne , Daniel F. Filipovic
发明人： Jifeng Geng , Gary J. Ballantyne , Daniel F. Filipovic
IPC分类号： H03L7/06
CPC分类号： H03L7/089 , H03C3/0916 , H03C3/0941 , H03C3/095 , H03C3/0966 , H03L7/085
摘要： A digital phase-locked loop (DPLL) supporting two-point modulation is described. In one design, the DPLL includes a phase-to-digital converter and a loop filter operating in a loop, a first processing unit for a lowpass modulation path, and a second processing unit for a highpass modulation path. The first processing unit receives an input modulating signal and provides a first modulating signal to a first point inside the loop after the phase-to-digital converter and prior to the loop filter. The second processing unit receives the input modulating signal and provides a second modulating signal to a second point inside the loop after the loop filter. The first processing unit may include an accumulator that accumulates the input modulating signal to convert frequency to phase. The second processing unit may include a scaling unit that scales the input modulating signal with a variable gain.
摘要翻译：描述了支持两点调制的数字锁相环（DPLL）。在一种设计中，DPLL包括一个相位数转换器和一个环路工作的环路滤波器，一个用于低通调制路径的第一处理单元和一个用于高通调制路径的第二处理单元。第一处理单元接收输入调制信号，并且在相位数转换器之后并且在环路滤波器之前向环路内的第一点提供第一调制信号。第二处理单元接收输入调制信号，并且在环路滤波器之后向环路内的第二点提供第二调制信号。第一处理单元可以包括累积输入调制信号以将频率转换为相位的累加器。第二处理单元可以包括用可变增益来缩放输入调制信号的缩放单元。

7. 发明授权

US07430406B2 Gain control in a wireless device 有权
标题翻译：在无线设备中增益控制
公开(公告)号：US07430406B2
公开(公告)日：2008-09-30
申请号：US10290577
申请日：2002-11-08
申请人： Daniel F. Filipovic
发明人： Daniel F. Filipovic
IPC分类号： H04B1/06
CPC分类号： H03G3/3052 , H03G3/001
摘要： This disclosure is directed to techniques that can be executed by a wireless device to perform various signal processing tasks associated with wireless communication. The techniques involve gain state switching based on an output of an analog-to-digital (A/D) converter, rather than gain state switching techniques in which an estimation of signal strength at the antenna is mapped to gain states. Use of the A/D converter output for gain state selection can provide more accurate and dynamic switchpoints.
摘要翻译：本公开涉及可以由无线设备执行以执行与无线通信相关联的各种信号处理任务的技术。这些技术涉及基于模数（A / D）转换器的输出的增益状态切换，而不是增益状态切换技术，其中将天线处的信号强度的估计映射到增益状态。使用A / D转换器输出进行增益状态选择可以提供更准确和更动态的开关点。

8. 发明授权

US07171182B2 Frequency synthesizers for supporting voice communication and wireless networking standards 有权
标题翻译：用于支持语音通信和无线网络标准的频率合成器
公开(公告)号：US07171182B2
公开(公告)日：2007-01-30
申请号：US10137101
申请日：2002-05-01
申请人： Daniel F. Filipovic
发明人： Daniel F. Filipovic
IPC分类号： H04B1/06
CPC分类号： H03L7/16 , H03B21/01 , H04B1/406
摘要： Techniques are described that facilitate the generation of different waveforms at different frequencies required for transmission and reception of wireless voice signals and wireless data signals. For example, a technique may include generating a first waveform in a wireless communication device using a frequency synthesizer, wherein the first waveform has a frequency associated with a voice communication standard, and generating a second waveform in the wireless communication device using the same frequency synthesizer, wherein the second waveform has a frequency associated with a wireless networking standard. In this manner, a wireless communication device can be improved and possibly simplified.
摘要翻译：描述了促进在发送和接收无线语音信号和无线数据信号所需的不同频率下生成不同波形的技术。例如，技术可以包括使用频率合成器在无线通信设备中生成第一波形，其中第一波形具有与语音通信标准相关联的频率，以及使用相同的频率合成器在无线通信设备中生成第二波形，其中所述第二波形具有与无线联网标准相关联的频率。以这种方式，可以改进和可能地简化无线通信设备。

9. 发明授权

US09252782B2 Wireless chipset with a non-temperature compensated crystal reference 有权
标题翻译：具有非温度补偿晶体参考的无线芯片组
公开(公告)号：US09252782B2
公开(公告)日：2016-02-02
申请号：US13345805
申请日：2012-01-09
申请人： Rick A. Wilcox , Daniel F. Filipovic , Xu Mike Chi , Chris M. Rosolowski
发明人： Rick A. Wilcox , Daniel F. Filipovic , Xu Mike Chi , Chris M. Rosolowski
IPC分类号： H03L1/02 , H03B5/30 , H03B5/36
CPC分类号： H03L1/028 , G01K7/22 , H03B5/30 , H03B5/36 , H03B5/364 , H03L1/027
摘要： An apparatus includes a temperature measuring device within a thermally conductive package. A crystal within the package is thermally coupled to the temperature measuring device and subjected to a same temperature as the temperature measuring device. A controller external to the package is configured to receive a signal from the crystal and a temperature measurement from the temperature measuring device. The controller is configured to estimate a frequency error of the crystal based on the temperature measurement and to provide a frequency error estimate to an external system.
摘要翻译：一种装置包括在导热封装内的温度测量装置。封装内的晶体热耦合到温度测量装置并经受与温度测量装置相同的温度。封装外部的控制器被配置为从晶体接收信号和来自温度测量装置的温度测量。控制器被配置为基于温度测量来估计晶体的频率误差，并且向外部系统提供频率误差估计。

10. 发明授权

US08532211B2 Methods and apparatus for power control based antenna switching 有权
标题翻译：基于功率控制的天线切换方法与装置
公开(公告)号：US08532211B2
公开(公告)日：2013-09-10
申请号：US12390230
申请日：2009-02-20
申请人： Daniel F. Filipovic , Yong Li
发明人： Daniel F. Filipovic , Yong Li
IPC分类号： H04B7/02
CPC分类号： H04B7/0608 , H04B7/061
摘要： A method for selecting an antenna is described. The method may include transmitting using a first antenna with a first metric and a radio frequency (RF) chain for a first dwelling period. The method may include switching to transmitting using a second antenna with a second metric for a first testing period. The second antenna may use the same RF chain as the first antenna. The first metric may be compared with the second metric to determine an optimal antenna. The optimal antenna may be selected.
摘要翻译：描述用于选择天线的方法。该方法可以包括使用具有用于第一住宅周期的第一度量和射频（RF）链的第一天线进行发送。该方法可以包括在第一测试周期内使用具有第二度量的第二天线切换到发射。第二天线可以使用与第一天线相同的RF链。可以将第一度量与第二度量进行比较以确定最佳天线。可以选择最佳天线。

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