公开(公告)号：US20050221792A1

公开(公告)日：2005-10-06

申请号：US11129828

申请日：2005-05-16

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H04R3/00 ,  H04B7/26 ,  H04M1/60 ,  H04B1/06

CPC分类号： H04M1/605 ,  H04M1/6016

摘要： A proximity detector for use in a mobile telephone having at least a microphone and a loudspeaker operatively connected to a signal processor is presented. The proximity detector includes data processing and control modules having a module for controlling the signal processor for activating the loudspeaker to reproduce an acoustic control signal. A correlator correlates a control signal received directly by the microphone and a control signal being reflected from a user of the telephone and then received by the microphone to determine the distance between the telephone and the user. A signal level controller controls the signal processor to vary the signal level of an audible signal reproduced by the loudspeaker depending on the determined distance between the telephone and the user.

摘要翻译： 提供了一种用于移动电话中的接近检测器，其具有至少一个可操作地连接到信号处理器的麦克风和扬声器。 接近检测器包括具有用于控制信号处理器以激活扬声器以再现声控信号的模块的数据处理和控制模块。 相关器将由麦克风直接接收的控制信号和从电话用户反射的控制信号相关联，然后由麦克风接收以确定电话和用户之间的距离。 信号电平控制器控制信号处理器，以根据确定的电话和用户之间的距离来改变扬声器再现的可听信号的信号电平。

公开(公告)号：US06690740B1

公开(公告)日：2004-02-10

申请号：US09372250

申请日：1999-08-11

申请人： Sven Mattisson ,  Joakim Persson ,  Jacobus Cornelius Haartsen

发明人： Sven Mattisson ,  Joakim Persson ,  Jacobus Cornelius Haartsen

IPC分类号： H04L2720

CPC分类号： H04L7/041 ,  H04L7/046 ,  H04L25/062 ,  H04L27/142

摘要： Methods and apparatus for performing synchronization and DC-offset compensation in FM transmission systems significantly reduce the overhead associated with transmitting a conventional digital preamble at the start of each of a succession of transmitted digital data packets. According to exemplary embodiments, a multi-part digital preamble includes a short, substantially DC-free leading part followed by a code-protected synchronization part which is not necessarily substantially DC-free. The leading part provides for coarse DC offset estimation and synchronization, while the coded synchronization part carries timing and/or other useful information which can be unique for each packet. One or more substantially DC-free trailing parts follow the synchronization part, or are included in the synchronization part itself, and provide for fine tuning of the DC-offset estimate. Since the substantially DC-free leading and trailing parts are extremely short, and since the synchronization part carries useful information, the overhead associated with a preamble according to the invention is significantly reduced as compared to a conventional, entirely DC-free, preamble.

摘要翻译： 用于在FM传输系统中执行同步和DC偏移补偿的方法和装置显着地减少了在一系列发送的数字数据分组中的每一个的开始时与传统的数字前导码相关联的开销。 根据示例性实施例，多部分数字前导码包括短的，基本上无DC的前导部分，其后面是代码保护的同步部分，其不一定基本上不含DC。 前置部分提供粗略的直流偏移估计和同步，而编码的同步部分承载每个分组可以是唯一的定时和/或其它有用的信息。 一个或多个基本无DC的拖尾部分跟随同步部分，或者被包括在同步部分本身中，并且提供对DC偏移估计的微调。 由于基本无DC的前导部分和尾部部分非常短，并且由于同步部分携带有用信息，与传统的完全无DC前导码相比，与根据本发明的前同步码相关联的开销显着降低。

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：US08477860B2

公开(公告)日：2013-07-02

申请号：US12869816

申请日：2010-08-27

申请人： Matthias Kamuf ,  Bengt Lindoff ,  Sven Mattisson ,  Fredrik Nordström

发明人： Matthias Kamuf ,  Bengt Lindoff ,  Sven Mattisson ,  Fredrik Nordström

IPC分类号： H04L27/01

CPC分类号： H04L27/2647 ,  H04L25/03292 ,  H04L25/03318 ,  H04L2025/03414

摘要： Decoding a received Orthogonal Frequency Division Multiplex (OFDM) signal that occupies a first set of subcarriers in a radio frequency spectrum includes ascertaining an interference model that represents interference occurring in the first set of subcarriers caused by a transmitted OFDM signal that occupies a second set of subcarriers in the radio frequency spectrum. A set of scaled soft values is produced that represents information conveyed by the received OFDM signal over the first set of subcarriers, wherein each scaled soft value in the set of scaled soft values corresponds to a respective one of the subcarriers in the first set of subcarriers, and wherein a scaling amount applied to each of the scaled soft values is based on a corresponding level of interference in said respective one of the subcarriers as indicated by the interference model. A decoding process is performed that generates detected data from the scaled soft values.

摘要翻译： 解码在无线电频谱中占用第一组子载波的接收的正交频分多路复用（OFDM）信号包括确定干扰模型，其表示由发送的OFDM信号引起的第一组子载波中所发生的干扰，所述OFDM信号占用第二组 无线电频谱中的子载波。 产生一组缩放的软值，其表示在第一组子载波上由接收的OFDM信号传送的信息，其中该缩放的软值集合中的每个缩放的软值对应于第一组子载波中的相应的一个子载波 ，并且其中应用于每个所述缩放的软值的缩放量基于由所述干扰模型指示的所述相应一个子载波中的相应的干扰电平。 执行从缩放的软值生成检测数据的解码处理。

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：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。

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。