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21. 发明授权

US07953028B2 Methods and apparatus for improved receiver performance in half-duplex wireless terminals 有权
标题翻译：用于提高半双工无线终端接收机性能的方法和装置
公开(公告)号：US07953028B2
公开(公告)日：2011-05-31
申请号：US12099945
申请日：2008-04-09
申请人： Bengt Lindoff , Sven Mattisson
发明人： Bengt Lindoff , Sven Mattisson
IPC分类号： H04B7/00
CPC分类号： H04L5/16 , H04B1/44
摘要： A half-duplex mobile terminal having first and second receiver branches connected, during a receive mode, to respective antennas, is disclosed. One of the antennas is selectively connected to the first receiver branch or to a transmitter circuit. The first antenna is connected to the first receiver branch during a first interval, during which interval data is detected using outputs from both the first and second receiver branches. The first antenna is disconnected from the first receiver branch at the end of the first interval, and, during a second interval immediately following the first interval, data is detected using the output of the second receiver branch. A portion of the incoming transmission that arrives during the transition between the receive mode and transmit mode in a half-duplex transceiver is thus received and detected, improving performance of the half-duplex transceiver.
摘要翻译：公开了一种在接收模式期间将第一和第二接收机分支连接到相应天线的半双工移动终端。其中一个天线选择性地连接到第一接收机分支或发射机电路。第一天线在第一间隔期间连接到第一接收器分支，在该间隔期间，使用来自第一和第二接收器分支的输出检测间隔数据。在第一间隔结束时，第一天线与第一接收器分支断开，并且在第一间隔之后的第二间隔期间，使用第二接收器分支的输出来检测数据。因此，在半双工收发器中的接收模式和发送模式之间的转换期间到达的输入传输的一部分被接收和检测，从而提高了半双工收发器的性能。

22. 发明授权

US07904036B2 Modulation method and apparatus 有权
标题翻译：调制方法和装置
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。

23. 发明申请

US20100159858A1 Strong Signal Tolerant OFDM Receiver and Receiving Methods 有权
标题翻译：强信号容差OFDM接收机和接收方法
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。

24. 发明申请

US20090253385A1 System and Method for Adaptive Antenna Impedance Matching 有权
标题翻译：自适应天线阻抗匹配的系统和方法
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。

25. 发明申请

US20070126500A1 Modulation method and apparatus 有权
标题翻译：调制方法和装置
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。

26. 发明授权

US07205807B2 Cascode signal driver with low harmonic content 有权
标题翻译：具有低谐波含量的串联信号驱动器
公开(公告)号：US07205807B2
公开(公告)日：2007-04-17
申请号：US10855369
申请日：2004-05-28
申请人： Lars Svensson , Sven Mattisson
发明人： Lars Svensson , Sven Mattisson
IPC分类号： H03K5/12
CPC分类号： H03F1/223 , H03F2200/114 , H03F2200/417 , H03K17/162 , H03K19/00361
摘要： A method and apparatus for minimizing harmonic content in a digital signal driver circuit are disclosed. A digital input signal applied to an input node generates a corresponding digital output in a circuit with two or more MOS devices in cascode connection with each other. The slew rate of leading or trailing edge transitions associated with the output signal are controlled using one or more parasitic capacitances associated with the fabrication of two or cascode connected MOS devices. The two or more cascode connected MOS devices may further each have gate electrodes connected to a fixed potential so as to minimize the harmonic content. A control signal may further be applied to each gate electrode to turn off a leakage current path between source and drain electrodes. Harmonics may further be controlled by limiting a conductance between gate electrodes and fixed potentials using an active or passive device.
摘要翻译：公开了一种用于最小化数字信号驱动器电路中的谐波含量的方法和装置。施加到输入节点的数字输入信号在具有彼此并联连接的两个或多个MOS器件的电路中产生相应的数字输出。使用与制造两个或共源共栅连接的MOS器件相关联的一个或多个寄生电容来控制与输出信号相关联的前沿或后沿跃迁的转换速率。两个或更多个共源共栅连接的MOS器件还可以进一步具有连接到固定电位的栅电极，以使谐波含量最小化。还可以将控制信号施加到每个栅电极以关闭源极和漏极之间的漏电流路径。通过使用有源或无源器件限制栅电极和固定电位之间的电导可以进一步控制谐波。

27. 发明申请

US20070018732A1 Method and apparatus for transceiver frequency synthesis 有权
标题翻译：收发信机频率合成方法及装置
公开(公告)号：US20070018732A1
公开(公告)日：2007-01-25
申请号：US11186060
申请日：2005-07-21
申请人： Sven Mattisson
发明人： Sven Mattisson
IPC分类号： H03L7/00
CPC分类号： H04B1/403 , H03L7/185 , H03L7/1974 , H03L7/23
摘要： A method and apparatus for frequency synthesis in a transceiver are based on providing a primary frequency synthesizer configured to synthesize a receiver frequency signal from a receiver reference frequency signal, and providing an offset frequency synthesizer configured to synthesize a transmitter frequency signal from the receiver frequency signal using fractional-N division, which allows it to operate at an intermediate frequency that is a non-integer multiple of the receiver frequency signal. That arrangement enables non-integer duplex frequency distances between desired receive and transmit frequencies. The primary frequency synthesizer also may be operated as a fractional-N frequency synthesizer, meaning that the receiver frequency signal may have a non-integer relationship to the receiver reference frequency signal. Configuring the primary and offset frequency synthesizers to operate with fractional-N frequency synthesis allows independent frequency tuning/optimization of the primary and secondary frequency synthesizers.
摘要翻译：一种用于收发信机中的频率合成的方法和装置，是基于提供一个主频率合成器，其被配置为从接收机参考频率信号合成接收机频率信号，并提供一个偏移频率合成器，被配置为从接收机频率信号合成发射机频率信号使用小数N除法，其允许其在接收机频率信号的非整数倍的中间频率下操作。这种布置使得期望的接收和发送频率之间的非整数双工频率距离成为可能。主频率合成器也可以作为分数N频率合成器来操作，这意味着接收机频率信号可能与接收机参考频率信号具有非整数关系。配置主要和偏移频率合成器以分数N频率合成运行允许主频率和次频合成器的独立频率调谐/优化。

28. 发明授权

US07149191B2 Radio transceiver on a chip 有权
公开(公告)号：US07149191B2
公开(公告)日：2006-12-12
申请号：US10626025
申请日：2003-07-24
申请人： Karl Håkan Torbjörn Johansson-Gardenfors , Sven Mattisson , Jacobus Cornelis Haartsen
发明人： Karl Håkan Torbjörn Johansson-Gardenfors , Sven Mattisson , Jacobus Cornelis Haartsen
IPC分类号： H04J3/00
CPC分类号： H04B1/44 , H04B1/3833 , H04B1/408 , H04B1/715 , H04B15/00 , H04B2001/7152 , H04J3/10 , H04L5/1461 , H04L27/122
摘要： An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.

29. 发明授权

US06975667B2 Dual-radio communication apparatus, and an operating method thereof 失效
标题翻译：双无线电通信装置及其操作方法
公开(公告)号：US06975667B2
公开(公告)日：2005-12-13
申请号：US09859704
申请日：2001-05-17
申请人： Sven Mattisson , Jacobus Haartsen , Robert Bristow
发明人： Sven Mattisson , Jacobus Haartsen , Robert Bristow
IPC分类号： H04B1/38 , H04B1/40 , H04B7/185 , H04L12/56 , H04W84/06 , H04W84/18 , H04W88/06 , H04B1/69 , H04B1/713
CPC分类号： H04W88/06 , H04B1/005 , H04B1/3805 , H04B1/406 , H04B7/18563 , H04W84/06 , H04W84/18
摘要： A dual-radio communication apparatus has a first radio device, such as a Bluetooth radio, for use in a first frequency band, and a second radio device, such as a Globalstar satellite radio, for use in a second frequency band, which is proximate to the first frequency band. The communication apparatus also has a controller coupled to the first and second radio devices. The first radio device may comprise a frequency-hopping spread-spectrum transmitter. Moreover, the first radio device has a first operating mode employing a first frequency range. The first radio device also has a second operating mode employing a second frequency range, which is smaller than the first frequency range. The controller is adapted to set the first radio device in its second operating mode, when the second radio device is in operation, and otherwise set the first radio device in its first operating mode.
摘要翻译：双无线电通信装置具有用于第一频带的第一无线电装置，诸如蓝牙无线电装置，以及第二无线电装置，例如全球星卫星无线电装置，用于在第二频带中使用的第二无线电装置到第一个频带。通信设备还具有耦合到第一和第二无线电设备的控制器。第一无线电设备可以包括跳频扩频发射机。此外，第一无线电设备具有采用第一频率范围的第一操作模式。第一无线电设备还具有采用小于第一频率范围的第二频率范围的第二操作模式。控制器适于将第一无线电设备设置在其第二操作模式中，当第二无线电设备正在运行时，否则将第一无线电设备设置为其第一操作模式。

30. 发明申请

US20050007149A1 Cascode signal driver with low harmonic content 有权
标题翻译：具有低谐波含量的串联信号驱动器
公开(公告)号：US20050007149A1
公开(公告)日：2005-01-13
申请号：US10855369
申请日：2004-05-28
申请人： Lars Svensson , Sven Mattisson
发明人： Lars Svensson , Sven Mattisson
IPC分类号： H03F1/22 , H03K17/16 , H03K17/687 , H03K19/003 , H03K19/0175
CPC分类号： H03F1/223 , H03F2200/114 , H03F2200/417 , H03K17/162 , H03K19/00361
摘要： A method and apparatus for minimizing harmonic content in a digital signal driver circuit are disclosed. A digital input signal applied to an input node generates a corresponding digital output in a circuit with two or more MOS devices in cascode connection with each other. The slew rate of leading or trailing edge transitions associated with the output signal are controlled using one or more parasitic capacitances associated with the fabrication of two or cascode connected MOS devices. The two or more cascode connected MOS devices may further each have gate electrodes connected to a fixed potential so as to minimize the harmonic content. A control signal may further be applied to each gate electrode to turn off a leakage current path between source and drain electrodes. Harmonics may further be controlled by limiting a conductance between gate electrodes and fixed potentials using an active or passive device.
摘要翻译：公开了一种用于最小化数字信号驱动器电路中的谐波含量的方法和装置。施加到输入节点的数字输入信号在具有彼此并联连接的两个或多个MOS器件的电路中产生相应的数字输出。使用与两个或共源共栅连接的MOS器件的制造相关联的一个或多个寄生电容来控制与输出信号相关联的前沿或后沿跃迁的转换速率。两个或更多个共源共栅连接的MOS器件还可以进一步具有连接到固定电位的栅电极，以使谐波含量最小化。还可以将控制信号施加到每个栅电极以关闭源极和漏极之间的漏电流路径。通过使用有源或无源器件限制栅电极和固定电位之间的电导可以进一步控制谐波。

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