公开(公告)号：US20130083874A1

公开(公告)日：2013-04-04

申请号：US13249215

申请日：2011-09-29

申请人： Hendricus de Ruijter ,  Wentao Li

发明人： Hendricus de Ruijter ,  Wentao Li

IPC分类号： H04L27/06

CPC分类号： H03J7/04 ,  H03J7/00 ,  H03J7/02

摘要： A method an apparatus for performing automatic frequency compensation (or control) is disclosed. A method and apparatus for performing automatic frequency compensation (or control) is disclosed. In one embodiment, a method includes a radio receiver receiving a radio signal and detecting a preamble in the radio signal. The method further includes freezing an automatic frequency compensation (AFC) loop responsive to detecting the preamble. A clock source of the AFC loop may be switched from a first clock signal to a second clock signal. The method further includes subsequently unfreezing the AFC loop.

摘要翻译： 公开了一种执行自动频率补偿（或控制）的装置的方法。 公开了一种执行自动频率补偿（或控制）的方法和装置。 在一个实施例中，一种方法包括无线电接收机，其接收无线电信号并检测无线电信号中的前导码。 该方法还包括响应于检测前导码来冻结自动频率补偿（AFC）循环。 AFC回路的时钟源可以从第一时钟信号切换到第二时钟信号。 该方法还包括随后解冻AFC循环。

公开(公告)号：US20130078936A1

公开(公告)日：2013-03-28

申请号：US13244587

申请日：2011-09-25

申请人： Hendricus De Ruijter ,  Tamas Marozsak ,  Peter Onody

发明人： Hendricus De Ruijter ,  Tamas Marozsak ,  Peter Onody

IPC分类号： H04B1/16

CPC分类号： H04B1/28

摘要： An RF receiver includes an RF signal reception path to process an input signal for the receiver for a first mode of the receiver; an oscillator; and a harmonic generator. The harmonic generator generates a harmonic signal in response to operation of the oscillator to replace the input signal with the harmonic signal for a second mode of the receiver.

摘要翻译： RF接收机包括RF信号接收路径，用于处理接收机的输入信号用于接收机的第一模式; 振荡器 和谐波发生器。 谐波发生器响应于振荡器的操作而产生谐波信号以用接收器的第二模式的谐波信号替换输入信号。

公开(公告)号：US20120276853A1

公开(公告)日：2012-11-01

申请号：US13097698

申请日：2011-04-29

申请人： HENDRICUS DE RUIJTER

发明人： HENDRICUS DE RUIJTER

IPC分类号： H04W24/00 ,  H04W4/00

CPC分类号： H04W24/06

摘要： In a radio device such as a receiver or transceiver, a test operation can be performed to determine performance. A received signal can be processed to obtain demodulated samples, which can be provided to a logic to perform a logic operation on the samples to generate a logic output. A storage such as a counter or other mechanism is coupled to the logic to store a count of a number of the logic outputs having an error.

摘要翻译： 在诸如接收机或收发机的无线电设备中，可以执行测试操作以确定性能。 可以处理接收到的信号以获得解调样本，其可以提供给逻辑以对样本执行逻辑运算以产生逻辑输出。 诸如计数器或其他机构的存储器耦合到逻辑以存储具有错误的多个逻辑输出的计数。

公开(公告)号：US08121575B2

公开(公告)日：2012-02-21

申请号：US12243338

申请日：2008-10-01

申请人： Hendricus De Ruijter

发明人： Hendricus De Ruijter

IPC分类号： H04B1/10 ,  H04K3/00

CPC分类号： H04B1/30

摘要： A modulated intermediate frequency receiver is shown having a low noise amplifier for receiving a radio frequency signal and a modulation source for generating a modulation signal. A local oscillator generates a modulated local oscillator signal in response to the modulation signal. A first mixer mixes the output of the low noise amplifier with the output of the local oscillator. The output of the mixer is DC filtered and receive bandwidth filtered before input to a demodulator that generates a demodulated received signal. Further embodiments are shown for a complex receiver and having phase or frequency modulation compensation.

摘要翻译： 示出了具有用于接收射频信号的低噪声放大器和用于产生调制信号的调制源的调制中频接收机。 本地振荡器响应于调制信号产生调制的本地振荡器信号。 第一个混频器将低噪声放大器的输出与本地振荡器的输出混合。 混频器的输出被直流滤波，并且在输入到产生解调的接收信号的解调器之前被接收带宽滤波。 示出了用于复合接收机并具有相位或频率调制补偿的其它实施例。

公开(公告)号：US20110150155A1

公开(公告)日：2011-06-23

申请号：US12642013

申请日：2009-12-18

申请人： Ali Dolatshahi Pirooz ,  Hendricus De Ruijter

发明人： Ali Dolatshahi Pirooz ,  Hendricus De Ruijter

IPC分类号： H04B1/10

CPC分类号： H04B1/1036

摘要： A method includes filtering a received signal to generate a band-pass filtered signal using a band-pass filter having a pass-band including frequencies located within a central lobe of a power spectrum associated with a target channel of a plurality of channels supported by a communications system. The pass-band is approximately centered at a frequency of a null of a power spectrum associated with at least one other channel of the plurality of channels supported by the communications system. The method includes processing the received signal based on the band-pass filtered signal. The at least one other channel may include at least one of an alternate channel and an adjacent channel of the plurality of channels.

摘要翻译： 一种方法包括对接收的信号进行滤波以使用带通滤波器生成带通滤波的信号，该带通滤波器具有包括位于与由多个信道支持的多个信道的目标信道相关联的功率谱的中心波瓣内的频率的通带 通讯系统 通带大致集中在与由通信系统支持的多个信道中的至少一个其他信道相关联的功率谱的零点的频率上。 该方法包括基于带通滤波信号处理接收信号。 所述至少一个其它信道可以包括多个信道中的替代信道和相邻信道中的至少一个信道。

公开(公告)号：US20060226897A1

公开(公告)日：2006-10-12

申请号：US11399058

申请日：2006-04-06

申请人： Hendricus De Ruijter

发明人： Hendricus De Ruijter

IPC分类号： H03D3/00

CPC分类号： H03D3/26 ,  H03D3/007

摘要： A circuit and method for differential slope demodulator circuit are shown that utilize amplitude stabilizing of a frequency modulated signal to obtain an amplitude stabilized signal. Also shown is bandpass filtering of the amplitude stabilized signal for a first frequency that is offset by a shift frequency below an intermediate frequency, to obtain a first filtered signal and bandpass filtering the amplitude stabilized signal for a second frequency that is offset by the shift frequency above the intermediate frequency, to obtain a second filtered signal. The circuit and method further operate by detecting an envelope of the first filtered signal to obtain a first envelope signal, detecting an envelope of the second filtered signal to obtain a second envelope signal, and differencing the first and second envelope signals to obtain a demodulated output signal.

摘要翻译： 示出了用于差分斜率解调器电路的电路和方法，其利用调频信号的幅度稳定来获得幅度稳定信号。 还示出了对于第一频率的幅度稳定信号的带通滤波，该第一频率被低于中频的移频频率偏移，以获得第一滤波信号，并且对于由偏移频率偏移的第二频率的幅度稳定信号进行带通滤波 高于中频，以获得第二滤波信号。 该电路和方法进一步通过检测第一滤波信号的包络来获得第一包络信号，检测第二滤波信号的包络以获得第二包络信号，并差分第一和第二包络信号以获得解调输出 信号。

公开(公告)号：US20060049899A1

公开(公告)日：2006-03-09

申请号：US11211262

申请日：2005-08-25

申请人： Hendricus De Ruijter

发明人： Hendricus De Ruijter

IPC分类号： H03H11/00

CPC分类号： H03H11/0472 ,  H03H11/0444 ,  H03H2011/0494 ,  H03H2210/012 ,  H03H2210/015 ,  H03H2210/017 ,  H03H2210/021 ,  H03H2210/04

摘要： A resonator circuit is shown that is fabricated with substantially identical elements disposed symmetrically along an axis such that the circuit has a linear response to bias current. The alignment of the circuit permits multiple characteristics of the circuit to be calibrated.

摘要翻译： 示出了谐振器电路，其被制造成具有基本上相同的沿着轴对称设置的元件，使得电路对偏置电流具有线性响应。 电路的对准允许校准电路的多个特性。

公开(公告)号：US20060046657A1

公开(公告)日：2006-03-02

申请号：US10515684

申请日：2003-04-29

申请人： Hendricus De Ruijter

发明人： Hendricus De Ruijter

IPC分类号： H04B17/00

CPC分类号： H04B7/0811 ,  H04L1/205 ,  H04L25/061

摘要： Receivers (1,11) like mobile or cordless terminals and mobile or cordless base stations for receiving signals and comprising decision takers (2,12) for taking decisions like selecting antennas in antenna diversity systems (3) or like selecting channels to be used for communication (13) or like synchronisation decisions for synchronisation purposes are improved by providing them with wave analysers (4,14) for analysing at least a part—like a preamble or a pilot—of the received signal and for in response to analysis results supplying control signals to the decision takers (2,12). Such wave analysers (4,14) provide the receivers (1,11) with better quality indicators compared to prior art signal strength indicators and comprise delaying stages (20) for generating control signals representing DC jitter, comparing stages (40) for generating further control signals representing a presence of a non-part-frequency like presences of higher frequencies and lower frequencies, and data slicing stages (70) for generating sliced bits.

摘要翻译： 诸如移动或无绳终端的接收机（1,11）和用于接收信号的移动或无绳基站，并且包括用于采取天线分集系统（3）中选择天线的决策者（2,12）或类似于选择要用于 通过为它们提供用于分析至少一部分类似于前导码或接收信号的导频的波分析器（4,14），并且为了响应分析结果提供通信（13）或类似的用于同步目的的同步决定 控制信号给决策者（2,12）。 这样的波分析器（4,14）与现有技术的信号强度指示器相比，为接收器（1,11）提供了更好的质量指标，并且包括用于产生表示DC抖动的控制信号的延迟级（20），用于比较级（40）以进一步产生 表示存在非分频的控制信号，如较高频率和较低频率的存在，以及用于产生分片位的数据限幅级（70）。