公开(公告)号：EP2180593A1

公开(公告)日：2010-04-28

申请号：EP08167383.2

申请日：2008-10-23

Applicant: STMicroelectronics Belgium N.V. ,  Semiconductor Ideas to The Market (ItoM) BV

Inventor： Terryn, Steven ,  Borremans, Marc ,  Goetschalckx, Paul

IPC: H03D7/16

CPC classification number: H03D7/161 ,  H03D7/166 ,  H03D2200/0047 ,  H03D2200/0082

Abstract: Methods and devices for the compensation for variations in the frequency drift of a free-running VCO/DCO (voltage/digital controlled oscillator), e.g. inside a frequency synthesizer, are described. In one aspect, the frequency drift of the high-frequency synthesizer is compensated by adjusting the frequency of the baseband signal.
A counter unit is used to determine the frequency offset between the frequency of the free-running oscillator and a reference clock. A difference signal is used to correct the upstream or downstream signal.

Abstract translation: 用于补偿自由运行的VCO / DCO（电压/数字控制振荡器）的频率漂移变化的方法和装置，例如， 在频率合成器内部进行描述。 一方面，通过调整基带信号的频率来补偿高频合成器的频率漂移。 计数器单元用于确定自由振荡器的频率与参考时钟之间的频率偏移。 差分信号用于校正上行或下行信号。

公开(公告)号：EP1753193B1

公开(公告)日：2009-12-09

申请号：EP05447182.6

申请日：2005-08-12

Applicant: STMicroelectronics Belgium N.V.

Inventor： Capretta, Pietro ,  Terryn, Steven ,  Schmit, Jean-Jacques

IPC: H04L27/233

CPC classification number: H04L27/22 ,  H04L7/0041 ,  H04L7/0062 ,  H04L7/007

公开(公告)号：EP1753194B1

公开(公告)日：2008-10-22

申请号：EP05447185.9

申请日：2005-08-12

Applicant: STMicroelectronics Belgium N.V.

Inventor： Capretta, Pietro ,  Schmit, Jean-Jacques ,  Terryn, Steven

IPC: H04L27/233 ,  H04L27/227

CPC classification number: H04L27/22 ,  H04L2027/0065 ,  H04L2027/0095

公开(公告)号：EP1753194A1

公开(公告)日：2007-02-14

申请号：EP05447185.9

申请日：2005-08-12

Applicant: STMicroelectronics Belgium N.V.

Inventor： Capretta, Pietro ,  Schmit, Jean-Jacques ,  Terryn, Steven

IPC: H04L27/233 ,  H04L27/227

CPC classification number: H04L27/22 ,  H04L2027/0065 ,  H04L2027/0095

Abstract: Method and apparatus for a wireless receiver are described which derive at least a first stream of first digitized samples (30) from a received analog signal at a first sampling rate and identify a first frequency offset of the first stream based on a plurality of parallel correlations (40) using complex reference signals (38) which differ from each other by phase offsets. A second frequency offset is identified (48) based on tracking a demodulation accuracy for each symbol which is demodulated from the first stream of digitized samples. These frequency offsets can be used to rotate decision areas in the demodulator.
The methods and apparatus may be used in a Bluetooth receiver.

Abstract translation: 描述了用于无线接收机的方法和装置，其以第一采样率从接收到的模拟信号中导出至少第一数字化样本的第一流（30），并且基于多个并行相关性来识别第一流的第一频率偏移 （40）使用由相位偏移彼此不同的复参考信号（38）。 基于从第一数字化样本流解调的每个符号跟踪解调精度，识别第二频率偏移（48）。 这些频率偏移可用于旋转解调器中的判定区域。 方法和装置可以用在蓝牙接收机中。

公开(公告)号：EP1753193A1

公开(公告)日：2007-02-14

申请号：EP05447182.6

申请日：2005-08-12

Applicant: STMicroelectronics Belgium N.V.

Inventor： Capretta, Pietro ,  Terryn, Steven ,  Schmit, Jean-Jacques

IPC: H04L27/233

CPC classification number: H04L27/22 ,  H04L7/0041 ,  H04L7/0062 ,  H04L7/007

Abstract: A receiver comprises:
means (12) for deriving at least a first stream (30) of first digitized samples from a received analog signal at a first sampling rate, means (40,42) for selecting a first sampling point and at least a second sampling point,
a demodulator (44) for demodulating first and second symbols from the at least first stream of samples based on the first and the at least one second sampling points, and
means (46) for determining a value related to a demodulation accuracy for the first and second symbols and for outputting a signal, the means (40,42) for selecting being adapted to alter the sampling point based on the signal. By assessing the demodulation accuracy in real time clock drift can be compensated.
The demodulation accuracy can be a value related to a phase error or an error energy such as EVM or DEVM for each demodulated symbol.

Abstract translation: 接收机包括：用于从第一采样率的接收的模拟信号导出第一数字化样本的至少第一流（30）的装置（12），用于选择第一采样点和至少第二采样点的装置（40,42） 采样点，用于基于所述第一和所述至少一个第二采样点从所述至少第一采样流解调第一和第二符号的解调器（44），以及用于确定与所述至少第一采样点相关的解调精度的值 第一和第二符号并且用于输出信号，用于选择的装置（40,42）适于基于该信号改变采样点。 通过评估实时的解调精度，可以补偿时钟漂移。 对于每个解调的符号，解调精度可以是与相位误差或诸如EVM或DEVM的误差能量相关的值。