专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08112045B2 Translational loop transmitter architecture employing channel power ratio measurements for modulation accuracy calibration 有权
标题翻译：平移环路发射机架构采用信道功率比测量进行调制精度校准
公开(公告)号：US08112045B2
公开(公告)日：2012-02-07
申请号：US12336830
申请日：2008-12-17
申请人： Hong Shi , Henrik T. Jensen
发明人： Hong Shi , Henrik T. Jensen
IPC分类号： G06F15/16
CPC分类号： H04B1/0475
摘要： A Radio Frequency RF transmitter includes a translational loop architecture that supports non-constant envelope modulation types and includes by adjusting the envelope of the translational loop at the translational loop output. The RF transmitter includes an Intermediate Frequency (IF) modulator, a translational loop, an envelope time delay adjust block, an envelope adjust block, and a time delay calibration block. The IF modulator receives a modulated baseband signal and produces a modulated IF signal having a non-constant envelope. The translational loop receives the modulated IF signal and produces a modulated RF signal having a constant envelope. The envelope time delay adjust block receives an envelope signal corresponding to the original modulated signal and produces a time delayed envelope signal based upon a time delay control signal. The envelope adjust block adjusts the modulated RF signal based upon the time delayed envelope signal to produce an envelope adjusted modulated RF signal. Finally, the time delay calibration block receives the envelope adjusted modulated RF signal and produces the time delay control signal.
摘要翻译：射频RF发射机包括支持非恒定包络调制类型的平移环路架构，并且包括通过调整平移环路输出端的平移环路的包络。 RF发射机包括中频（IF）调制器，平移回路，包络时间延迟调整块，包络调整块和时间延迟校准块。 IF调制器接收调制的基带信号并产生具有非恒定包络的调制IF信号。平移环路接收调制的IF信号并产生具有恒定包络线的调制RF信号。包络时间延迟调整块接收对应于原始调制信号的包络信号，并且基于时间延迟控制信号产生时间延迟包络信号。信封调整块基于时间延迟的包络信号来调整调制的RF信号，以产生包络调制的调制的RF信号。最后，延时校准块接收包络调制的调制RF信号并产生延时控制信号。

2. 发明授权

US07136431B2 DC offset correcting in a direct conversion or very low IF receiver 有权
标题翻译：在直接转换或非常低的IF接收机中进行DC偏移校正
公开(公告)号：US07136431B2
公开(公告)日：2006-11-14
申请号：US10279949
申请日：2002-10-24
申请人： Hong Shi , Henrik T. Jensen
发明人： Hong Shi , Henrik T. Jensen
IPC分类号： H04L25/06
CPC分类号： H04L25/062
摘要： A direct conversion or VLIF receiver corrects DC offset by, prior to receiving a burst of data, the receiver determines a coarse DC offset with the antenna of the receiver switched off. The receiver then adjusts an analog portion of the receiver (e.g., the output of the mixers) based on the coarse DC offset. The receiver then determines a gain setting of the receiver (e.g., for the low noise amplifier and/or programmable gain amplifiers) with the antenna on. The receiver then sets the gain of at least one gain stage of the receiver based on the gain setting. The receiver then determines a fine DC offset with the antenna off. The receiver then, while receiving a burst of data, subtracts the fine DC offset from the digital baseband or low IF signal prior to data recovery.
摘要翻译：直接转换或VLIF接收机通过在接收数据突发之前纠正DC偏移，接收机在接收机的天线关闭时确定粗略的直流偏移。然后，接收机基于粗略的DC偏移调整接收机的模拟部分（例如，混频器的输出）。然后，接收机确定接收机的增益设置（例如，对于低噪声放大器和/或可编程增益放大器），天线开启。然后，接收机基于增益设置来设置接收机的至少一个增益级的增益。然后，接收器在关闭天线的情况下确定精细的直流偏移。然后，在接收数据突发之前，接收机在数据恢复之前从数字基带或低IF信号中减去精细的DC偏移。

3. 发明授权

US07110469B2 Self-calibrating direct conversion transmitter 失效
公开(公告)号：US07110469B2
公开(公告)日：2006-09-19
申请号：US10094587
申请日：2002-03-08
申请人： Hong Shi , Henrik T. Jensen
发明人： Hong Shi , Henrik T. Jensen
IPC分类号： H04L27/04
CPC分类号： H04B1/406
摘要： A self-calibrating transmitter includes an up-conversion mixing module, summing module, calibration determination module, and a calibration execution module. The up-conversion mixing module is operably coupled to mix an I component of a base-band signal with an I component of a local oscillation to produce a mixed I signal and is also operably coupled to mix a Q component of the base-band signal with a Q component of the local oscillation to produce a mixed Q signal. The summing module sums the mixed I signal with the mixed Q signal to produce a modulated radio frequency (RF) signal. The calibration determination module is operably coupled to produce a calibration signal, which it generates by interpreting the local oscillation and the modulated RF signal. The calibration execution module is operably coupled to calibrate the DC level of the I and/or Q component of the base-band signal, and/or the gain of the I and/or Q component of the base-band signal based on the calibration signal.

4. 发明授权

US07587000B2 Radio receiver utilizing a single analog to digital converter 有权
标题翻译：使用单个模数转换器的无线电接收机
公开(公告)号：US07587000B2
公开(公告)日：2009-09-08
申请号：US11958055
申请日：2007-12-17
申请人： Henrik T. Jensen , Hong Shi
发明人： Henrik T. Jensen , Hong Shi
IPC分类号： H04L27/00
CPC分类号： H03D3/007 , H04L27/38
摘要： A radio receiver includes a single analog to digital converter, a 1st digital mixing module, and a 2nd digital mixing module. The single analog to digital converter is coupled to convert the filtered IF signal into a digital IF signal, which includes information regarding an in-phase component and a quadrature component of a modulated RF signal. The 1st and 2nd mixing modules each receive the digital IF signal and mix the digital IF signal with an in-phase and quadrature digital local oscillation to produce a 1st baseband signal component and a 2nd baseband signal component.
摘要翻译：无线电接收机包括单个模数转换器，第一数字混合模块和第二数字混合模块。耦合单个模数转换器以将经滤波的IF信号转换成数字IF信号，该数字IF信号包括关于调制RF信号的同相分量和正交分量的信息。第一和第二混频模块各自接收数字IF信号，并将数字IF信号与同相和正交数字本地振荡混频，以产生第一基带信号分量和第二基带信号分量。

5. 发明授权

US06819910B2 Radio employing a self calibrating transmitter with reuse of receiver circuitry 失效
标题翻译：无线电采用自动校准发射机，重复使用接收机电路
公开(公告)号：US06819910B2
公开(公告)日：2004-11-16
申请号：US10094495
申请日：2002-03-08
申请人： Hong Shi , Henrik T. Jensen
发明人： Hong Shi , Henrik T. Jensen
IPC分类号： H04B104
CPC分类号： H04B1/406
摘要： A radio includes a self-calibrating transmitter that uses a portion of a receiver section to perform self-calibration. Accordingly, the radio includes a transmitter section, mixer, analog receiver section, calibration switch module, digital receiver section, calibration determination module, and calibration execution module. The transmitter section produces a modulated RF signal from base-band signal and a transmitter local oscillation. The mixer mixes the modulated RF signal with the transmitter local oscillation to produce a base-band representation of the modulated RF signal. In calibration mode, the calibration switch module provides the base-band representation to the receiver section, which processes the representation to produce a 2nd base-band digital signal. The calibration determination module interprets frequency components of the 2nd base-band digital signal to produce a calibration signal that compensates for imbalances within the transmitter.
摘要翻译：收音机包括使用接收器部分的一部分来执行自校准的自校准发射器。因此，无线电设备包括发射机部分，混合器，模拟接收机部分，校准开关模块，数字接收机部分，校准确定模块和校准执行模块。发射机部分从基带信号和发射机本地振荡产生调制的RF信号。混频器将调制的RF信号与发射机本地振荡器混合，以产生调制的RF信号的基带表示。在校准模式下，校准开关模块向接收器部分提供基带表示，其处理该表示以产生第二基带数字信号。校准确定模块解释第二基带数字信号的频率分量以产生补偿发射机内的不平衡的校准信号。

6. 发明授权

US07409194B2 Calibrating an RF transmitter 失效
标题翻译：校准射频发射器
公开(公告)号：US07409194B2
公开(公告)日：2008-08-05
申请号：US10958453
申请日：2004-10-05
申请人： Hong Shi , Henrik T. Jensen
发明人： Hong Shi , Henrik T. Jensen
IPC分类号： H04B1/04 , H04B17/00 , H01L25/49
CPC分类号： H04B1/406
摘要： A method for calibrating a radio frequency (RF) transmitter begins by mixing a modulated RF signal with an in-phase (I) component of a local oscillation or a quadrature (Q) component of the local oscillation to produce a baseband representation of the modulated RF signal. The method continues by converting the baseband representation of the modulated RF signal into a digital baseband signal. The method continues by filtering the digital baseband signal to produce at least one frequency spectrum component. The method continues by interpreting the at least one frequency spectrum component to produce a calibration signal. The method continues by calibrating at least one of DC offset and gain offset of digital transmitter processing module based on the calibration signal.
摘要翻译：用于校准射频（RF）发射机的方法通过将调制的RF信号与本地振荡的本地振荡或正交（Q）分量的同相（I）分量混合以产生调制的射频信号。该方法通过将调制的RF信号的基带表示转换成数字基带信号而继续。该方法通过对数字基带信号进行滤波来产生至少一个频谱分量。该方法通过解释至少一个频谱分量来产生校准信号。该方法通过基于校准信号校准数字发射器处理模块的DC偏移和增益偏移中的至少一个来继续。

7. 发明授权

US08073044B2 Polar transmitter with digital and analog filtering of envelope 失效
标题翻译：极地发射器具有数字和模拟滤波的信封
公开(公告)号：US08073044B2
公开(公告)日：2011-12-06
申请号：US11968221
申请日：2008-01-02
申请人： Alireza Zolfaghari , Hooman Darabi , Henrik T. Jensen
发明人： Alireza Zolfaghari , Hooman Darabi , Henrik T. Jensen
IPC分类号： H03H7/30 , H04L7/12 , H04L25/03
CPC分类号： H04L27/361 , H03F1/3241 , H04B1/0483 , H04B2001/0425 , H04L25/03343
摘要： A calibration circuit measures the variation in a filter resistor within the analog domain of the envelope path of a polar transmitter and produces a digital value representative of that variation. A digital processor determines a digital control signal from the digital value that is used to compensate, in the digital domain of the envelope path, for the variation in the filter resistor in the analog domain.
摘要翻译：校准电路测量极性发射器的包络路径的模拟域内的滤波电阻的变化，并产生代表该变化的数字值。数字处理器根据数字值确定数字控制信号，该数字值用于在包络路径的数字域中补偿模拟域中的滤波电阻的变化。

8. 发明授权

US07961812B2 Digital compensation for nonlinearities in a polar transmitter 有权
标题翻译：极地发射机的非线性数字补偿
公开(公告)号：US07961812B2
公开(公告)日：2011-06-14
申请号：US12842963
申请日：2010-07-23
申请人： Henrik T. Jensen , Hooman Darabi , Alireza Zolfaghari
发明人： Henrik T. Jensen , Hooman Darabi , Alireza Zolfaghari
IPC分类号： H04L25/03
CPC分类号： H04B1/0475 , H03C5/00 , H03F1/0222 , H03F1/3241
摘要： A polar transmitter includes a digital processor coupled to receive a complex modulated digital signal and a feedback signal produced from the complex modulated digital signal and that is operable to compare the complex modulated digital signal to the feedback signal to determine an error signal indicative of a difference between the complex modulated digital signal and the feedback signal. The digital processor is further operable to produce a correction signal from the error signal and to add the correction signal to the complex modulated digital signal to produce a corrected complex modulated digital signal.
摘要翻译：极性发射器包括耦合以接收复调制数字信号的数字处理器和从复调制数字信号产生的反馈信号，其可操作以将复调制数字信号与反馈信号进行比较，以确定指示差分的误差信号在复调制数字信号与反馈信号之间。数字处理器还可操作以从误差信号产生校正信号，并将校正信号添加到复调制数字信号以产生经校正的复数调制数字信号。

9. 发明授权

US07826564B2 Complex digital phase locked loop for use in a demodulator and method of optimal coefficient selection 有权
标题翻译：用于解调器的复数数字锁相环和最佳系数选择方法
公开(公告)号：US07826564B2
公开(公告)日：2010-11-02
申请号：US12234343
申请日：2008-09-19
申请人： Henrik T. Jensen
发明人： Henrik T. Jensen
IPC分类号： H03D3/18 , H03D3/24
CPC分类号： H03D3/24 , H03D2200/0082
摘要： A complex digital phase locked loop for use in a digital demodulator includes a phase detector for producing a phase error indicative of a difference in phase between a complex digital input signal and a complex digital feedback signal. The phase error is input to a controller, which multiplies the phase error by a gain factor selected to stabilize and optimize the phase locked loop and produces an output signal for use in extracting a frequency deviation present in the complex digital input signal. The output signal is also input to a numerically controlled oscillator that tracks the phase of the complex digital input signal based on the output signal and produces the complex digital feedback signal.
摘要翻译：用于数字解调器的复数数字锁相环包括相位检测器，用于产生指示复数数字输入信号和复数数字反馈信号之间的相位差的相位误差。将相位误差输入到控制器，该控制器将相位误差乘以所选择的增益因子，以稳定和优化锁相环，并产生用于提取复数字输入信号中存在的频率偏差的输出信号。输出信号也输入到数控振荡器，该振荡器基于输出信号跟踪复数数字输入信号的相位，并产生复数数字反馈信号。

10. 发明授权

US07515652B2 Digital modulator for a GSM/GPRS/EDGE wireless polar RF transmitter 失效
标题翻译：用于GSM / GPRS / EDGE无线极性射频发射机的数字调制器
公开(公告)号：US07515652B2
公开(公告)日：2009-04-07
申请号：US10944552
申请日：2004-09-17
申请人： Henrik T. Jensen
发明人： Henrik T. Jensen
IPC分类号： H04L25/00
CPC分类号： H04L27/2003 , H04L27/2017
摘要： A digital modulator in a radio transmitter includes circuitry for switching between Gaussian Minimum Shift Keying (GMSK) and Phase-Shift Keying (PSK) while maintaining spectral mask requirements. The digital modulator of the present invention includes both GMSK and PSK symbol mappers that produce PSK in-phase and quadrature symbols and GMSK symbols, respectively, to a pulse shaping block. Based on opposite phases of a modulation control signal, the symbol mappers produce either modulated data or a steam of logic zeros to the pulse shaping block. The pulse shaping block filters the received data and multiplexes the data so that each modulated data stream receives non-zero data during a guard time to avoid abrupt changes in the modulated signal that would violate the spectral mask requirements.
摘要翻译：无线电发射机中的数字调制器包括用于在保持频谱掩模要求的同时在高斯最小移频键控（GMSK）和相移键控（PSK）之间切换的电路。本发明的数字调制器包括分别产生PSK同相和正交符号和GMSK符号的GMSK和PSK符号映射器到脉冲整形块。基于调制控制信号的相反相位，符号映射器产生调制数据或逻辑零的蒸汽到脉冲整形块。脉冲整形块对接收到的数据进行滤波并复用数据，使得每个调制数据流在保护时间期间接收非零数据，以避免将会违反频谱掩模要求的调制信号的突然变化。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式