公开(公告)号：US06519236B1

公开(公告)日：2003-02-11

申请号：US09156695

申请日：1998-09-18

申请人： Jacobus Cornelis Haartsen ,  Sven Mattisson

发明人： Jacobus Cornelis Haartsen ,  Sven Mattisson

IPC分类号： H04Q700

CPC分类号： H04W52/367 ,  H04W52/42

摘要： Transmission power in a frequency-hopping radio system that transmits packets from a sending radio unit to a receiving radio unit, wherein each packet includes an address designating the receiving radio unit, is controlled by measuring received signal strength of packets whose addresses were successfully received in the receiving radio unit, regardless of whether other portions of the respective packets were successfully received. An average signal strength value is generated from the received signal strength measurements. The mathematical difference between the average signal strength value and a target value associated with the receiving radio unit is then determined and used as a basis for deciding whether to send a power control message from the receiving radio unit to the sending radio unit. In order to provide a hysteresis in the power control process, a power control message is sent from the receiving radio unit to the sending radio unit if the mathematical difference is greater than a first decision boundary, or if the mathematical difference is less than a second decision boundary. The power control message may itself include the mathematical difference which, when received by the sending radio unit, is used as a basis for determining a transmission power level adjustment amount. The target value, against which the average signal strength value is compared, may be based on the receiver sensitivity adjusted to account for implementation losses and other inaccuracies.

摘要翻译： 在发射无线电单元向接收无线电单元发送分组的跳频无线电系统中的发射功率，其中每个分组包括指定接收无线电单元的地址，通过测量其地址被成功接收的分组的接收信号强度来控制 接收无线电单元，而不管各个分组的其他部分是否被成功接收。 从接收信号强度测量值产生平均信号强度值。 然后确定平均信号强度值和与接收无线电单元相关联的目标值之间的数学差异，并将其用作决定是否从接收无线电单元向发送无线电单元发送功率控制消息的基础。 为了在功率控制过程中提供迟滞，如果数学差异大于第一判定边界，则功率控制消息从接收无线电单元发送到发送无线电单元，或者如果数学差小于第二判定边界 决定边界。 功率控制消息本身可以包括当由发送无线电单元接收时被用作确定发送功率电平调整量的基础的数学差异。 平均信号强度值与之对比的目标值可以基于被调整以考虑实施损失和其他不准确性的接收机灵敏度。

公开(公告)号：US06345176B1

公开(公告)日：2002-02-05

申请号：US09004766

申请日：1998-01-09

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H04B126

CPC分类号： H04W52/028 ,  H04B1/26 ,  Y02D70/40

摘要： In a radio front-end circuit having at least two amplifier-mixer cascades, the amplifiers are switched on or off via the mixers. By switching between the amplifier-mixer cascades, the power consumption is lowered.

公开(公告)号：US06335659B1

公开(公告)日：2002-01-01

申请号：US09274327

申请日：1999-03-23

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H03D302

CPC分类号： H03D3/22

摘要： A frequency modulated signal demodulator circuit includes a phase shift element and a time delay element which operate on an input signal (V_IF). The phase shift element and the time delay element are provided by a gyrator component (14, 16, 20).

摘要翻译： 频率调制信号解调器电路包括对输入信号（V_IF）进行操作的相移元件和时间延迟元件。 相移元件和延时元件由旋转器组件（14,16,20）提供。

公开(公告)号：US06246713B1

公开(公告)日：2001-06-12

申请号：US09092860

申请日：1998-06-08

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H04K100

CPC分类号： H04B1/713 ,  H04B2001/71367 ,  H04B2001/7154 ,  H04L5/0012 ,  H04L5/0041 ,  H04L5/006

摘要： A radio communication system that utilizes an available frequency spectrum that is divided up into a plurality of channels to be used by the radio communication system is operated in accordance with a frequency hopping strategy that permits a user to simultaneously utilize more than one channel during each hop period, wherein it is permissible, but not mandatory, for at least one of the channels utilized by the user during a first hop period to again be used by the user during an immediately following second hop period, so long as at least one of the channels utilized by the user during the second hop period is different from all of the channels utilized by the user during the first hop period. In some embodiments, the number of channels simultaneously utilized by any one user need not be the same as the number of channels simultaneously utilized by any other user.

摘要翻译： 利用被划分为多个信道以供无线电通信系统使用的可用频谱的无线电通信系统根据允许用户在每个跳跃期间同时利用多于一个信道的跳频策略来操作 期间，其中对于在第一跳跃周期期间由用户使用的至少一个信道是允许的但不是强制的，在用户在紧随的第二跳跃周期期间再次被使用，只要至少一个 在第二跳跃周期期间用户使用的信道不同于用户在第一跳跃周期期间使用的所有信道。 在一些实施例中，任何一个用户同时使用的信道数量不必与任何其他用户同时使用的信道数量相同。

公开(公告)号：US08855580B2

公开(公告)日：2014-10-07

申请号：US12163248

申请日：2008-06-27

申请人： Paul Wilkinson Dent ,  Sven Mattisson

发明人： Paul Wilkinson Dent ,  Sven Mattisson

IPC分类号： H04B1/10 ,  H04B1/52

CPC分类号： H04B1/525

摘要： Circuits and methods are disclosed for reducing interference from transmitter leakage in a radio transceiver. An exemplary method for reducing interference from transmitter leakage in a radio transceiver comprises downconverting, filtering, and sampling a radio frequency signal comprising a desired signal and a transmitter leakage signal to obtain a sampled signal of interest. The method further comprises generating a sampled distortion signal estimate that estimates one or more distortion products of the transmitter leakage signal, such as a squared amplitude obtained from a square-law device or corresponding digital function. Finally, the method comprises combining the sampled distortion signal estimate with the sampled signal of interest to obtain interference-reduced signal samples. In some embodiments, this may comprise correlating the sampled distortion signal estimate with the sampled signal of interest to determine a scaling factor, scaling the sampled distortion signal estimate with the scaling factor, and subtracting the scaled distortion signal estimate from the sampled signal of interest to obtain the interference-reduced signal samples.

摘要翻译： 公开了用于减少无线电收发器中发射机泄漏的干扰的电路和方法。 用于减少无线电收发机中的发射机泄漏的干扰的示例性方法包括对包括期望信号和发射机泄漏信号的射频信号进行下变频，滤波和采样，以获得感兴趣的采样信号。 该方法还包括生成估计发射机泄漏信号的一个或多个失真产物的采样失真信号估计，例如从平方律装置获得的平方振幅或相应的数字功能。 最后，该方法包括将采样的失真信号估计与所关注的采样信号组合以获得干扰减小的信号采样。 在一些实施例中，这可以包括将采样的失真信号估计与所关注的采样信号相关联以确定缩放因子，用缩放因子缩放采样的失真信号估计，以及从所感测的采样信号中减去经缩放的失真信号估计 获得干扰减少信号样本。

公开(公告)号：US20120129474A1

公开(公告)日：2012-05-24

申请号：US13361163

申请日：2012-01-30

申请人： Sven Mattisson ,  Magnus Nilsson

发明人： Sven Mattisson ,  Magnus Nilsson

IPC分类号： H04B1/04 ,  H03C3/00

CPC分类号： H03C3/40

摘要： A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.

摘要翻译： 用于射频发射机的调制电路包括本地振荡器电路，其被配置为以期望的频率产生一个或多个本地振荡器信号，占空比为或约为百分之二十五，而调制器被配置为产生一个或多个调制 响应于一个或多个本地振荡器信号的信号和一个或多个基带信息信号。 在至少一个实施例中，调制电路包括一个调制器，该调制器包括组合的混合和跨导电路，其包括用作每个基带信息信号的晶体管电路，用作调制器的调制输入。 每个晶体管电路包括由基带信息信号驱动的第一晶体管，并将调制器输出节点耦合到对应的跨导元件，以及由一个或多个本地振荡器信号之一驱动的第二晶体管，并将相应的跨导元件耦合到信号地 节点。

公开(公告)号：US07904036B2

公开(公告)日：2011-03-08

申请号：US11292488

申请日：2005-12-02

申请人： Sven Mattisson ,  Magnus Nilsson

发明人： Sven Mattisson ,  Magnus Nilsson

IPC分类号： H01Q11/12 ,  H04B1/04 ,  H03F3/38

CPC分类号： H03C3/40

摘要： A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.

摘要翻译： 用于射频发射机的调制电路包括本地振荡器电路，其被配置为以期望的频率产生一个或多个本地振荡器信号，占空比为或约为百分之二十五，而调制器被配置为产生一个或多个调制 响应于一个或多个本地振荡器信号的信号和一个或多个基带信息信号。 在至少一个实施例中，调制电路包括一个调制器，该调制器包括组合的混合和跨导电路，其包括用作每个基带信息信号的晶体管电路，用作调制器的调制输入。 每个晶体管电路包括由基带信息信号驱动的第一晶体管，并将调制器输出节点耦合到对应的跨导元件，以及由一个或多个本地振荡器信号之一驱动的第二晶体管，并将相应的跨导元件耦合到信号地 节点。

公开(公告)号：US20100159858A1

公开(公告)日：2010-06-24

申请号：US12339630

申请日：2008-12-19

申请人： Paul Wilkinson Dent ,  Sven Mattisson

发明人： Paul Wilkinson Dent ,  Sven Mattisson

IPC分类号： H03D7/16 ,  H04K1/10 ,  H04B1/10

CPC分类号： H04B1/123 ,  H04B1/30 ,  H04L27/2647

摘要： Circuits and methods are disclosed for compensating for received signal distortion caused by non-linearities in wideband receivers. An exemplary receiver includes a distortion waveform generator configured to approximate non-linear response characteristics of a downconverter circuit used to downconvert the received radio frequency signal. The resulting estimated distortion waveform is filtered, using filter(s) substantially similar to those used for filtering an intermediate frequency signal that includes the desired signal and non-linear distortion products caused by strong interfering signals. The filtered estimated distortion waveform and intermediate frequency signal are sampled, to obtain a sampled distortion signal and a sampled signal of interest. The sampled distortion signal and the sampled signal of interest are divided into a plurality of frequency channels. For a selected number of frequency channels, the sampled distortion signal for a frequency channel is scaled, and subtracted from the corresponding sampled signal of interest for the same frequency channel to obtain reduced-interference signal samples for the frequency channel.

摘要翻译： 公开了用于补偿由宽带接收机中的非线性引起的接收信号失真的电路和方法。 示例性接收机包括失真波形发生器，其被配置为近似用于下变频接收的射频信号的下变频器电路的非线性响应特性。 使用基本上类似于用于滤波包括由强干扰信号引起的期望信号和非线性失真产物的中频信号的滤波器，所得到的估计失真波形被滤波。 对滤波的估计失真波形和中频信号进行采样，以获得采样的失真信号和感兴趣的采样信号。 采样的失真信号和感兴趣的采样信号被分成多个频道。 对于所选数量的频道，对频道的采样失真信号进行缩放，并从相同频率信道的对应采样信号中减去，以获得用于频率信道的减少干扰信号采样。

公开(公告)号：US20090253385A1

公开(公告)日：2009-10-08

申请号：US12099550

申请日：2008-04-08

申请人： Paul Wilkinson Dent ,  Sven Mattisson

发明人： Paul Wilkinson Dent ,  Sven Mattisson

IPC分类号： H04B1/44 ,  H04B1/38

CPC分类号： H04B1/0458

摘要： Methods and apparatus are disclosed for automatically adjusting antenna impedance match in a wireless transceiver employing phase-amplitude modulation. According to some embodiments of the invention, a wireless transceiver comprises a transmitter circuit and a receiver circuit connected to the antenna by a transmit/receive duplexer. An electronically adjustable matching network is located between the transmitter output and the antenna. To control the adjustable matching network, a directional coupler is located between the transmitter output and the matching network to separate transmit signals reflected from the antenna system, including the antenna, the matching network and the T/R duplexer. The reflected transmit signals are routed to the receiver circuit, which digitizes the reflected signal and determines an antenna reflection coefficient based on the digitized reflected signal and the modulation signal used to create the transmit signal. The complex antenna reflection coefficient is used to determine any adjustment needed to the antenna matching network.

摘要翻译： 公开了用于在采用相位幅度调制的无线收发器中自动调整天线阻抗匹配的方法和装置。 根据本发明的一些实施例，无线收发器包括发射机电路和通过发射/接收双工器连接到天线的接收机电路。 电子可调匹配网络位于发射机输出和天线之间。 为了控制可调匹配网络，定向耦合器位于发射机输出和匹配网络之间，以分离天线系统反射的发射信号，包括天线，匹配网络和T / R双工器。 反射的发射信号被路由到接收机电路，其对反射信号进行数字化，并且基于用于产生发射信号的数字化反射信号和调制信号确定天线反射系数。 复合天线反射系数用于确定天线匹配网络所需的任何调整。

公开(公告)号：US20070126500A1

公开(公告)日：2007-06-07

申请号：US11292488

申请日：2005-12-02

申请人： Sven Mattisson ,  Magnus Nilsson

发明人： Sven Mattisson ,  Magnus Nilsson

IPC分类号： H03F3/38

CPC分类号： H03C3/40

摘要： A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.

摘要翻译： 用于射频发射机的调制电路包括本地振荡器电路，其被配置为以期望的频率产生一个或多个本地振荡器信号，占空比为或约为百分之二十五，而调制器被配置为产生一个或多个调制 响应于一个或多个本地振荡器信号的信号和一个或多个基带信息信号。 在至少一个实施例中，调制电路包括一个调制器，该调制器包括组合的混合和跨导电路，其包括用作每个基带信息信号的晶体管电路，用作调制器的调制输入。 每个晶体管电路包括由基带信息信号驱动的第一晶体管，并将调制器输出节点耦合到对应的跨导元件，以及由一个或多个本地振荡器信号之一驱动的第二晶体管，并将相应的跨导元件耦合到信号地 节点。