公开(公告)号：US08139540B2

公开(公告)日：2012-03-20

申请号：US11571099

申请日：2004-07-02

申请人： Nadim Khlat ,  David Myara

发明人： Nadim Khlat ,  David Myara

IPC分类号： H04W36/00 ,  H04B7/216

CPC分类号： H04W88/06

摘要： An arrangement and method for discontinuous software FDD monitoring during TDD call allows removal of a conventional external notch filter in a dual mode WCDMA and PCS/DCS handset. The WCDMA RX frame is allowed to have a few slots corrupted by the PCS/DCS transmitter noise during DCS transmission, and a scheme is used to recover the required information by not considering the corrupted slots. Due to the fact that during WCDMA FDD RX monitoring, the processing required is performed in stages, and since the information that is measured during a WCDMA frame is repeated in every frame, the scheme of the invention is based on the idea that if a given slot is corrupted in a WCDMA frame, in the next WCDMA frame the slot will be no more corrupted due to the difference in timing between the PCS/DCS transmitter protocol and the WCDMA timing protocol.

摘要翻译： 在TDD呼叫期间用于不连续软件FDD监视的布置和方法允许在双模WCDMA和PCS / DCS手机中去除传统的外部陷波滤波器。 在DCS传输期间，允许WCDMA RX帧具有被PCS / DCS发射机噪声损坏的几个时隙，并且使用一种方案来通过不考虑损坏的时隙来恢复所需的信息。 由于在WCDMA FDD RX监视期间，所需的处理是分阶段执行的，并且由于在每帧中重复在WCDMA帧期间测量的信息，所以本发明的方案基于以下思想：如果给定 时隙在WCDMA帧中被破坏，在下一个WCDMA帧中，由于PCS / DCS发射机协议和WCDMA定时协议之间的定时差异，该时隙将不再被破坏。

公开(公告)号：US08064863B1

公开(公告)日：2011-11-22

申请号：US12371018

申请日：2009-02-13

申请人： David Reed ,  Nadim Khlat

发明人： David Reed ,  Nadim Khlat

IPC分类号： H04B1/18 ,  H04B1/10

CPC分类号： H04B1/30

摘要： The present invention relates to image rejection calibration in a radio frequency (RF) receiver. In one embodiment, the receiver includes a receiver front-end and an image rejection calibration system. The image rejection calibration system provides a first test signal to an RF input of the receiver front-end, and obtains first measurements of a quadrature output signal output from the receiver front-end while the first test signal is applied to the RF input. The image rejection calibration system then applies a second test signal to the RF input of the receiver front-end that is approximately 90 degrees out-of-phase with the first test signal, and obtains second measurements of the quadrature output signal while the second test signal is applied to the RF input. Based on the first and second measurements, the image rejection calibration system determines an amplitude error and a phase error of the receiver front-end.

摘要翻译： 本发明涉及射频（RF）接收机中的镜像抑制校准。 在一个实施例中，接收机包括接收机前端和镜像抑制校准系统。 图像抑制校准系统向接收机前端的RF输入提供第一测试信号，并且在将第一测试信号施加到RF输入端时获得从接收机前端输出的正交输出信号的第一测量值。 然后，图像抑制校准系统将第二测试信号施加到与第一测试信号相差大约90度的接收器前端的RF输入端，并且在第二测试期间获得正交输出信号的第二测量值 信号被施加到RF输入。 基于第一和第二测量，图像抑制校准系统确定接收机前端的振幅误差和相位误差。

公开(公告)号：US08005441B1

公开(公告)日：2011-08-23

申请号：US12117269

申请日：2008-05-08

申请人： Nadim Khlat ,  David Myara

发明人： Nadim Khlat ,  David Myara

IPC分类号： H04B1/04 ,  H01Q11/12

CPC分类号： H03G3/3042 ,  H04B2001/0416

摘要： The present invention relates to estimating a direct current (DC) offset of a power detection circuit when an estimated instantaneous amplitude of a continuous-transmission amplitude-modulated (AM) radio frequency (RF) signal is below a first threshold. The power detection circuit may be used to estimate an average output power associated with the continuous-transmission AM RF signal. The estimated average output power may be used as part of a feedback system to regulate the average output power. The estimated DC offset of the power detection circuit may be used to improve the estimate of the average output power, particularly over temperature and supply voltage variations. Estimating the DC offset of the power detection circuit when the estimated instantaneous amplitude of the continuous-transmission AM RF signal is below the first threshold may minimize errors in the estimated DC offset.

摘要翻译： 本发明涉及当连续发射幅度调制（AM）射频（RF）信号的估计瞬时幅度低于第一阈值时估计功率检测电路的直流偏移。 功率检测电路可以用于估计与连续发送AM RF信号相关联的平均输出功率。 估计的平均输出功率可以用作反馈系统的一部分，以调节平均输出功率。 功率检测电路的估计的DC偏移可以用于改善平均输出功率的估计，特别是在温度和电源电压变化方面。 当估计的连续发送AM RF信号的瞬时幅度低于第一阈值时，估计功率检测电路的DC偏移可以使估计的DC偏移中的误差最小化。

公开(公告)号：US07948964B1

公开(公告)日：2011-05-24

申请号：US11956379

申请日：2007-12-14

申请人： Nadim Khlat ,  David Myara ,  Jeremie Rafin

发明人： Nadim Khlat ,  David Myara ,  Jeremie Rafin

IPC分类号： G06F17/00

CPC分类号： H04B1/7073 ,  H04J3/0685 ,  H04W56/0045

摘要： The present invention relates to synchronization circuitry that is used to synchronize an asynchronous received RF message with a transmitted RF message. In one embodiment of the present invention, the synchronization circuitry includes at least one counter, which is used to associate timing of the asynchronous received RF message with a receive count value, and associate timing of the transmitted RF message with a transmit count value. A time delay between occurrence of the receive count value and the transmit count value provides accurate timing for the start of the transmitted RF message.

摘要翻译： 本发明涉及同步电路，其用于将异步接收的RF消息与发射的RF消息同步。 在本发明的一个实施例中，同步电路包括至少一个计数器，其用于将异步接收的RF消息的定时与接收计数值相关联，并将发送的RF消息的定时与发送计数值相关联。 接收计数值的发生与发送计数值之间的时间延迟为发送的RF消息的开始提供准确的定时。

公开(公告)号：US07724805B1

公开(公告)日：2010-05-25

申请号：US11470340

申请日：2006-09-06

申请人： Nadim Khlat ,  David Myara

发明人： Nadim Khlat ,  David Myara

IPC分类号： H04L27/36 ,  H04B1/00

CPC分类号： H04W52/52 ,  H04B17/327 ,  H04B2201/70707 ,  H04J13/004

摘要： A system and method are provided for quickly measuring the Root Mean Square (RMS) value of digital quadrature signals (I, Q) input to a Wideband Code Division Multiple Access (W-CDMA) transmitter. In general, in a W-CDMA transmitter such as that in a Universal Mobile Telecommunications System (UMTS), multiple channels are combined to provide the digital quadrature signal (I, Q) input to the transmitter. The RMS value of the digital quadrature signal (I, Q) may be determined using a number of consecutive samples of the digital quadrature signal (I, Q) over a period corresponding to mutually orthogonal segments of the spreading codes used for the transmitted channels. As a result of the mutual orthogonality of the segments of the spreading codes, a residual error of the RMS measurement is equal to zero, thereby providing an accurate RMS measurement in much less time than required by traditional RMS measurement schemes.

摘要翻译： 提供了一种用于快速测量输入到宽带码分多址（W-CDMA）发射机的数字正交信号（I，Q）的均方根（RMS）值的系统和方法。 通常，在诸如通用移动电信系统（UMTS）中的W-CDMA发射机中，组合多个信道以提供输入到发射机的数字正交信号（I，Q）。 数字正交信号（I，Q）的RMS值可以在对应于用于发送信道的扩展码的相互正交的段的周期内使用数字正交信号（I，Q）的连续采样数来确定。 作为扩展码段的互相正交性的结果，RMS测量的残余误差等于零，从而在比传统RMS测量方案所要求的时间少得多的时间内提供精确的RMS测量。

公开(公告)号：US06931241B2

公开(公告)日：2005-08-16

申请号：US09746692

申请日：2000-12-21

申请人： Nadim Khlat ,  Stephen Kuffner

发明人： Nadim Khlat ,  Stephen Kuffner

IPC分类号： H03M3/02 ,  H03D7/16 ,  H04B1/30 ,  H04B1/40 ,  H04B1/69 ,  H04J11/00 ,  H04B17/02

CPC分类号： H04B1/30 ,  H03D7/166 ,  H04B1/406

摘要： A communications receiver and a method for receiving and processing information transmitted on either a wide band carrier or a narrow band carrier having In-phase-Quadrature-phase (IQ) modulation, comprising, detecting a portion of the spectrum wide enough to encompass the wide band carrier (BW), converting the wide band carrier to baseband in I and Q components, each component having a bandwidth of BW/2, converting the I and Q components into further I and Q components to form components II, IQ, QI, and QQ of bandwidth equal to BW/4, where each of the sub-bands may contain a portion of the originally transmitted information. Operating in wideband mode, each of the components/is separately processed to extract portions of the originally transmitted information, and operating in a narrowband mode, each of the components containing information is separately processed within the narrow band transmitted carrier to extract portions of the originally transmitted information. The components are then recombined to reconstruct the originally transmitted information.

摘要翻译： 一种用于接收和处理在具有同相正交相位（IQ）调制的宽带载波或窄带载波上发送的信息的通信接收机和方法，包括：检测一部分频谱，以包含宽 频带载波（BW），在I和Q分量中将宽带载波转换为基带，每个分量具有BW / 2的带宽，将I和Q分量转换成更多的I和Q分量以形成分量II，IQ，QI， 和QQ的带宽等于BW / 4，其中每个子带可以包含原始发送的信息的一部分。 在宽带模式下，分别处理每个组件，以提取原始传输信息的部分，并以窄带模式操作，每个包含信息的组件在窄带传输载波内单独处理，以提取原始的 传输信息。 然后将组件重新组合以重建原始传输的信息。

公开(公告)号：US20050118973A1

公开(公告)日：2005-06-02

申请号：US10481977

申请日：2002-06-03

申请人： Nadim Khlat

发明人： Nadim Khlat

IPC分类号： H03L7/197 ,  H03D7/16 ,  H03J5/02 ,  H03J7/06 ,  H04B1/30 ,  H04L27/36 ,  H04L27/38 ,  H04B1/06

CPC分类号： H03D7/165 ,  H03J5/0272 ,  H03J7/065 ,  H03L7/1974 ,  H04B1/30

摘要： Local oscillator apparatus comprising communication signal terminals (LNA IN, LNA INX; RF OUT,RF OUTN) for a communication signal, especially in a receiver or a transmitter, and a controlled frequency oscillator (204; 404) for producing a local oscillator signal. The local oscillator also includes a reference frequency generator (210; 410) and a feedback loop (208;408) for selecting and adjusting the frequency (fVCO) of the local oscillator signal relative to the frequency (fxtal) of said reference frequency signal. A first frequency divider (205; 405) divides the frequency of the local oscillatr signal by a first division factor (M) to produce a conversion signal, where the frequency (FILO) of said conversion signal is at least approximately equal to the frequency (fRF) of the communication signal, and conversion means (202,203; 402, 403) responsive to the conversion signal converts between said communication signal and a base-band signal. A second frequency divider (206;406) divides the frequency of the local oscillator signal by a second division factor (N) and is connected in the feedback loop, where the first division factor (N) is different to the second division factor (M) and the ratios between said first and second division factors (M/N, N/M) are fractional.

摘要翻译： 本地振荡器装置包括用于通信信号的通信信号端（LNA IN，LNA INX; RF OUT，RF OUTN），特别是在接收机或发射机中，以及用于产生本地振荡器信号的受控频率振荡器（204,404）。 本地振荡器还包括参考频率发生器（210; 410）和用于相对于所述参考频率信号的频率（fxtal）选择和调整本地振荡器信号的频率（fVCO）的反馈回路（208; 408）。 第一分频器（205; 405）将本地振荡器信号的频率除以第一分频因子（M）以产生转换信号，其中所述转换信号的频率（FILO）至少近似等于频率 fRF）和响应于转换信号的转换装置（202,203; 402,403）在所述通信信号和基带信号之间进行转换。 第二分频器（206; 406）将本地振荡器信号的频率除以第二分频因子（N），并连接在反馈环路中，其中第一分频因子（N）不同于第二分频因子（M ），并且所述第一和第二分割因子（M / N，N / M）之间的比率是分数的。

公开(公告)号：US06678340B1

公开(公告)日：2004-01-13

申请号：US09535396

申请日：2000-03-24

申请人： Nadim Khlat ,  Patrick Clement

发明人： Nadim Khlat ,  Patrick Clement

IPC分类号： H04B110

CPC分类号： H03D3/007 ,  H03D7/166

摘要： Apparatus 20,30,40,50 for receiving and processing a wanted Radio Frequency signal comprises a radio frequency to intermediate frequency down-conversion stage 20 for receiving the wanted radio frequency signal and out-putting a complex intermediate frequency signal; an analogue to digital converter 30 for converting the complex intermediate frequency signal to a digital complex intermediate signal; an intermediate frequency to base-band down-conversion stage 40 for receiving the digital complex intermediate frequency signal and out-putting a digital complex base-band signal; and a complex notch filter 50 for receiving the digital complex base-band signal and out-putting a notch filtered digital complex base-band signal wherein the complex notch filter 50 substantially filters out a small portion of the base-band signal centred about a first, non-zero, frequency while substantially passing a corresponding portion of the base-band signal centred about a second frequency having the same magnitude but opposite sign to the first frequency.

摘要翻译： 用于接收和处理所需射频信号的设备20,30,40,50包括用于接收所需射频信号并输出​​复合中频信号的射频至中频下变频级20; 用于将复合中频信号转换为数字复合中间信号的模数转换器30; 中频到基带下变频级40，用于接收数字复合中频信号并输出​​数字复基带信号; 以及用于接收数字复基带信号并输出​​陷波滤波的数字复基带信号的复陷波滤波器50，其中复陷波滤波器50基本上过滤掉以第一和第二信号为中心的基带信号的一小部分 ，非零频率，同时基本上将以具有相同幅度但相反符号的第二频率为中心的基带信号的对应部分传送到第一频率。

公开(公告)号：US09954436B2

公开(公告)日：2018-04-24

申请号：US13876518

申请日：2011-09-29

申请人： Nadim Khlat

发明人： Nadim Khlat

IPC分类号： H02J1/10 ,  H02J3/00 ,  H02M3/07 ,  H02M1/00

CPC分类号： H02M3/07 ,  H02M2001/009 ,  Y10T307/406

摘要： The detailed description described embodiments of highly efficient power management systems configurable to simultaneously generate various output voltage levels for different components, sub-assemblies, and devices of electronic devices, sub-systems, and systems. In particular, the described embodiments include power management systems that substantially reduce or eliminate the need for inductors, large numbers of capacitors, and complex switching techniques to transform an available voltage level from a system power source, such as a battery, to more desirable power supply voltages. Some described embodiments include a charge pump that uses only two flying capacitors to simultaneously generate multiple supply outputs, where each of the multiple supply outputs may provide either the same or a different output voltage level. The described embodiments also include efficient power management systems that flexibly provide highly accurate voltage levels that are substantially insensitive to the voltage level provided by a system power source, such as a battery.

公开(公告)号：US09112570B2

公开(公告)日：2015-08-18

申请号：US13020548

申请日：2011-02-03

申请人： Nadim Khlat ,  Marcus Granger-Jones

发明人： Nadim Khlat ,  Marcus Granger-Jones

IPC分类号： H04B7/00 ,  H04B1/10

CPC分类号： H04B1/1036

摘要： A tunable receiver system uses programmable notch filters to identify available channel pairs for transmitting and receiving data via a femtocell base station. In addition, one of the programmable notch filters may be used to suppress infiltration of the transmit path signal into the receiver path of the receiver device. The other programmable notch filter may be used to suppress a blocker signal identified by the receiver device.

摘要翻译： 可调谐接收机系统使用可编程陷波滤波器来识别用于经由毫微微小区基站发送和接收数据的可用信道对。 此外，可编程陷波滤波器之一可以用于抑制发射路径信号进入接收机设备的接收机路径的渗透。 另一个可编程陷波滤波器可用于抑制由接收机设备识别的阻塞信号。