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

US08090333B2 Receiving apparatus, receiving method, and program 有权
标题翻译：接收装置，接收方法和程序
公开(公告)号：US08090333B2
公开(公告)日：2012-01-03
申请号：US11906866
申请日：2007-10-04
申请人： Takahiro Okada
发明人： Takahiro Okada
IPC分类号： H04B1/18
CPC分类号： H04B1/28 , H03J7/02 , H03J2200/02 , H03J2200/28 , H04L27/2657 , H04L27/2675 , H04L2027/0016 , H04L2027/0026
摘要： A receiving apparatus includes: a demodulating unit which demodulates an IF signal obtained by subjecting a received RF signal to frequency conversion; a detecting unit which detects a carrier wave frequency error contained in the IF signal; a frequency control unit which sets an initial value of a frequency in the demodulation process by the demodulating unit and for correcting a frequency error of a frequency used for the demodulation process by the demodulating unit based on the carrier wave frequency error detected by the detecting unit; and a control unit which controls a setting of an initial value of a frequency in the demodulation process by the demodulating unit by means of the frequency control unit after a receiving channel is switched, based on the carrier wave frequency error before a receiving channel is switched, the error being detected by the detecting unit, when a receiving channel is switched.
摘要翻译：一种接收装置，包括：解调单元，对通过对所接收的RF信号进行频率转换而获得的IF信号进行解调; 检测单元，其检测包含在所述IF信号中的载波频率误差; 频率控制单元，其通过解调单元设置解调处理中的频率的初始值，并且用于基于由检测单元检测到的载波频率误差来校正由解调单元用于解调处理的频率的频率误差 ; 以及控制单元，其基于接收信道切换之前的载波频率误差，在接收信道切换之后，通过频率控制单元控制解调单元在解调处理中的初始值的设置当检测单元检测到错误时，接收信道被切换。

2. 发明授权

US08023607B2 Frequency synchronization method and apparatus 有权
标题翻译：频率同步方法和装置
公开(公告)号：US08023607B2
公开(公告)日：2011-09-20
申请号：US12007841
申请日：2008-01-16
申请人： Hideo Ohwada
发明人： Hideo Ohwada
IPC分类号： H03D3/24
CPC分类号： H04L27/0014 , H03J2200/02 , H04L2027/0032 , H04L2027/0038 , H04L2027/0053 , H04L2027/0065
摘要： A frequency synchronization method comprise a first step of detecting a frequency error which occurs when a high-frequency receiving signal is converted into a digital signal of a base-band, performing rounding or discarding processing and generating a local oscillation signal depending on the converted analog signals, a second step of generating a digital signal whose frequency depending on a discard component obtained by the rounding or discarding processing when the rounding or discarding processing is performed, and a third step of canceling a frequency component of the digital signal which is generated by the second step from a frequency component of the digital signal of the base-band.
摘要翻译：频率同步方法包括：检测当高频接收信号被转换为基带的数字信号时发生的频率误差的第一步骤，执行舍入或丢弃处理并根据转换的模拟产生本地振荡信号信号，第二步骤，当执行舍入处理或舍弃处理时，产生其取决于通过舍入或丢弃处理获得的丢弃分量的频率的数字信号，以及消除数字信号的频率分量的第三步骤，该第三步骤由从基带的数字信号的频率分量的第二步。

3. 发明授权

US07769111B2 Detection of large carrier offsets using a timing loop 有权
标题翻译：使用定时循环检测大载波偏移
公开(公告)号：US07769111B2
公开(公告)日：2010-08-03
申请号：US11527578
申请日：2006-09-27
申请人： Amy Gayle Hundhausen , Tommy Yu
发明人： Amy Gayle Hundhausen , Tommy Yu
IPC分类号： H04L27/14
CPC分类号： H03J7/02 , H03J2200/02 , H04L27/0014 , H04L2027/0034 , H04L2027/0055 , H04L2027/0073
摘要： A method and apparatus for the detection and correction of large carrier offsets. A set of known correction carrier offsets are used to translate an input signal having a carrier offset. After applying each correction carrier offset, a state of a timing recovery loop is evaluated. The set of known correction carrier offsets are sequentially used to translate the input signal until the timing recovery loop is locked. The carrier offset is substantially acquired when the timing recovery loop is locked.
摘要翻译：一种检测和校正大载波偏移的方法和装置。一组已知的校正载波偏移用于平移具有载波偏移的输入信号。在应用每个校正载波偏移之后，评估定时恢复循环的状态。已知校正载波偏移的集合被顺序地用于平移输入信号，直到定时恢复循环被锁定。当定时恢复循环被锁定时，基本上获取载波偏移。

4. 发明授权

US07733986B2 Receiver and electronic apparatus 失效
标题翻译：接收机和电子设备
公开(公告)号：US07733986B2
公开(公告)日：2010-06-08
申请号：US11572942
申请日：2006-06-08
申请人： Takeshi Fujii , Hiroaki Ozeki
发明人： Takeshi Fujii , Hiroaki Ozeki
IPC分类号： H03D3/24
CPC分类号： H04B1/28 , H03J2200/02 , H03J2200/07 , H03L7/193 , H04L27/2657 , H04L2027/0028 , H04L2027/0055 , H04L2027/0065
摘要： A receiver has a receiving unit including a PLL, a mixer, and a filter, and demodulating unit including a frequency error detector for detecting a frequency error in a signal from a filter. The PLL includes a local oscillator for supplying a local oscillation signal to a mixer, a variable frequency divider for frequency-dividing the local oscillation signal based on a signal from the frequency error detector, and a phase comparator for comparing a signal from the variable frequency divider with a signal from a crystal oscillator. The PLL can reduce the frequency error of the local oscillation signal.
摘要翻译：接收机具有包括PLL，混频器和滤波器的接收单元，以及包括用于检测来自滤波器的信号中的频率误差的频率误差检测器的解调单元。 PLL包括用于向混频器提供本地振荡信号的本地振荡器，用于基于来自频率误差检测器的信号对本地振荡信号进行分频的可变分频器，以及用于比较来自可变频率的信号的相位比较器分频器与来自晶体振荡器的信号。 PLL可以降低本地振荡信号的频率误差。

5. 发明授权

US07627068B2 Apparatus for frequency synchronization and method for the same 失效
标题翻译：频率同步装置及其方法
公开(公告)号：US07627068B2
公开(公告)日：2009-12-01
申请号：US11188643
申请日：2005-07-26
申请人： Wei-Nan Sun , Ho-Chi Huang
发明人： Wei-Nan Sun , Ho-Chi Huang
IPC分类号： H04L7/04
CPC分类号： H04L27/0014 , H03J2200/02 , H04L2027/0046 , H04L2027/0065 , H04L2027/0087
摘要： An apparatus and method for frequency synchronization is proposed to obtain the pilot tones and evaluate the frequency offset and time offset for frequency synchronization. The frequency synchronization method has the following steps: filtering a baseband signal of a frequency correction burst by using multiple pre-filters; measuring the baseband signal and the signals output from the pre-filters to produce the first power value and the second power values respectively; normalizing the maximum second power value by using the first power value so as to produce the first detection value; using the samples of the baseband signal at different time points and a predetermined mathematical function to produce the second detection value; combining the first and second detection values to produce the third detection value; and using the third detection value to determine whether the frequency correction burst is received or not.
摘要翻译：提出了一种用于频率同步的装置和方法，以获得导频音，并对频率同步的频偏和时间偏移进行评估。频率同步方法具有以下步骤：通过使用多个预滤波器对频率校正突发的基带信号进行滤波; 测量基带信号和从预滤波器输出的信号分别产生第一功率值和第二功率值; 通过使用第一功率值对最大第二功率值进行归一化，以产生第一检测值; 在不同的时间点使用基带信号的样本和预定的数学函数来产生第二检测值; 组合第一和第二检测值以产生第三检测值; 并且使用第三检测值来确定是否接收到频率校正突发。

6. 发明授权

US07599662B2 Method and system for frequency feedback adjustment in digital receivers 有权
标题翻译：数字接收机频率反馈调整方法及系统
公开(公告)号：US07599662B2
公开(公告)日：2009-10-06
申请号：US11102123
申请日：2005-04-08
申请人： Brima Ibrahim , Hea Joung Kim , Henrik Tholstrup Jensen
发明人： Brima Ibrahim , Hea Joung Kim , Henrik Tholstrup Jensen
IPC分类号： H04B17/00 , H04B7/00
CPC分类号： H03J7/02 , H03J2200/02 , H04L25/063 , H04L27/142 , H04L2027/0057 , H04L2027/0065
摘要： In RF transceivers, a method and a system for a frequency feedback adjustment in digital receivers are provided. A DC offset may result from the difference in frequencies between an RF transmitter and an RF receiver. An adjustment of the receiver's frequency may be implemented after synchronization occurs and may be performed by utilizing the Forward Error Correction (FEC) repetition rate in a header of a Bluetooth packet. The adjustment may be performed when the frequency difference exceeds a threshold value. In another aspect, adjusting the frequency of the RF receiver may be performed by modifying and/or changing a phase locked loop (PLL) trimmer register. This approach may allow an RF receiver to operate, in some instances, without the need for an equalizer. In this regard, the power consumed by the RF receiver may be minimized and/or the overall cost of the RF receiver may be reduced.
摘要翻译：在RF收发器中，提供了用于数字接收机中的频率反馈调整的方法和系统。 DC偏移可能由RF发射机和RF接收机之间的频率差引起。可以在同步发生之后实现接收机频率的调整，并且可以通过利用蓝牙分组的报头中的前向纠错（FEC）重复率来执行。当频率差超过阈值时，可以进行调整。在另一方面，可以通过修改和/或改变锁相环（PLL）微调寄存器来调整RF接收机的频率。这种方法可以允许RF接收机在某些情况下操作，而不需要均衡器。在这方面，RF接收机消耗的功率可以被最小化，和/或可以降低RF接收机的总体成本。

7. 发明申请

US20090232259A1 RECEIVER AND ELECTRONIC APPARATUS 失效
标题翻译：接收器和电子设备
公开(公告)号：US20090232259A1
公开(公告)日：2009-09-17
申请号：US11572942
申请日：2006-06-08
申请人： Takeshi Fujii , Hiroaki Ozeki
发明人： Takeshi Fujii , Hiroaki Ozeki
IPC分类号： H04L27/06
CPC分类号： H04B1/28 , H03J2200/02 , H03J2200/07 , H03L7/193 , H04L27/2657 , H04L2027/0028 , H04L2027/0055 , H04L2027/0065
摘要： A receiver has a receiving unit including a PLL, a mixer, and a filter, and demodulating unit including a frequency error detector for detecting a frequency error in a signal from a filter. The PLL includes a local oscillator for supplying a local oscillation signal to a mixer, a variable frequency divider for frequency-dividing the local oscillation signal based on a signal from the frequency error detector, and a phase comparator for comparing a signal from the variable frequency divider with a signal from a crystal oscillator. The PLL can reduce the frequency error of the local oscillation signal.
摘要翻译：接收机具有包括PLL，混频器和滤波器的接收单元，以及包括用于检测来自滤波器的信号中的频率误差的频率误差检测器的解调单元。 PLL包括用于向混频器提供本地振荡信号的本地振荡器，用于基于来自频率误差检测器的信号对本地振荡信号进行分频的可变分频器，以及用于比较来自可变频率的信号的相位比较器分频器与来自晶体振荡器的信号。 PLL可以降低本地振荡信号的频率误差。

8. 发明授权

US07509108B2 Method and apparatus for automatic frequency correction with a frequency error signal generated by block correlation of baseband samples with a known code sequence 失效
标题翻译：用于通过基带样本与已知码序列的块相关产生的频率误差信号进行自动频率校正的方法和装置
公开(公告)号：US07509108B2
公开(公告)日：2009-03-24
申请号：US11983491
申请日：2007-11-09
申请人： Donald M. Grieco , Aykut Bultan
发明人： Donald M. Grieco , Aykut Bultan
IPC分类号： H04B7/00
CPC分类号： H03J7/02 , H03J7/04 , H03J2200/02
摘要： The present invention is related to a method and apparatus for automatic frequency correction of a local oscillator. The apparatus receives a carrier signal. The carrier signal includes a code sequence known to the apparatus. The apparatus downconverts the carrier signal to a baseband signal using the local oscillator. The apparatus performs a block correlation of the samples of the baseband signal with the known code sequence to generate a frequency error signal. The frequency error signal is fed back to the local oscillator to correct the frequency error.
摘要翻译：本发明涉及本地振荡器的自动频率校正的方法和装置。该装置接收载波信号。载波信号包括该装置已知的码序列。该装置使用本地振荡器将载波信号下变频为基带信号。该装置执行基带信号的样本与已知码序列的块相关，以产生频率误差信号。频率误差信号反馈给本地振荡器以校正频率误差。

9. 发明授权

US07443328B2 Apparatus and method of using spread pulse modulation to increase the control resolution of an electronic device 有权
标题翻译：使用扩展脉冲调制以增加电子设备的控制分辨率的装置和方法
公开(公告)号：US07443328B2
公开(公告)日：2008-10-28
申请号：US11843504
申请日：2007-08-22
申请人： Charles F. Barry , Tian Shen , Reed A. Parker , Feng F. Pan , Meenakshi Subramanian
发明人： Charles F. Barry , Tian Shen , Reed A. Parker , Feng F. Pan , Meenakshi Subramanian
IPC分类号： H03M1/66
CPC分类号： H03M1/66 , H03J7/02 , H03J2200/02 , H03J2200/07
摘要： An apparatus and method are described to increase the control resolution of an electronic device. In one embodiment, the invention includes a spread pulse modulation module to generate a first set of bits based on a second set of bits that is larger than the first set of bits. The spread pulse modulation module modulates the least significant bit (LSB) of the first set of bits based on information including the LSB modulation period and the LSB modulation duty cycle. The spread pulse modulation module also modulates the least significant bit of the first set of bits so that the least significant bit transitions at least twice from a high value to a low value during the modulation period. This embodiment of the invention also includes a digital-to-analog conversion module to generate an analog input signal to the electronic device based on the first set of bits.
摘要翻译：描述了一种用于增加电子设备的控制分辨率的装置和方法。在一个实施例中，本发明包括扩展脉冲调制模块，用于基于大于第一组位的第二组位产生第一组位。扩展脉冲调制模块基于包括LSB调制周期和LSB调制占空比的信息来调制第一组位的最低有效位（LSB）。扩展脉冲调制模块还调制第一组位的最低有效位，使得最低有效位在调制周期期间从高值至少两次转变为低值。本发明的该实施例还包括数模转换模块，用于基于第一组位产生到电子设备的模拟输入信号。

10. 发明申请

US20070098114A1 Detection of large carrier offsets using a timing loop 有权
标题翻译：使用定时循环检测大载波偏移
公开(公告)号：US20070098114A1
公开(公告)日：2007-05-03
申请号：US11527578
申请日：2006-09-27
申请人： Amy Hundhausen , Tommy Yu
发明人： Amy Hundhausen , Tommy Yu
IPC分类号： H04L27/00 , H03D3/24 , H04L27/06
CPC分类号： H03J7/02 , H03J2200/02 , H04L27/0014 , H04L2027/0034 , H04L2027/0055 , H04L2027/0073
摘要： A method and apparatus for the detection and correction of large carrier offsets. A set of known correction carrier offsets are used to translate an input signal having a carrier offset. After applying each correction carrier offset, a state of a timing recovery loop is evaluated. The set of known correction carrier offsets are sequentially used to translate the input signal until the timing recovery loop is locked. The carrier offset is substantially acquired when the timing recovery loop is locked.
摘要翻译：一种检测和校正大载波偏移的方法和装置。一组已知的校正载波偏移用于平移具有载波偏移的输入信号。在应用每个校正载波偏移之后，评估定时恢复循环的状态。已知校正载波偏移的集合被顺序地用于平移输入信号，直到定时恢复循环被锁定。当定时恢复循环被锁定时，基本上获取载波偏移。

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