公开(公告)号：US20130316659A1

公开(公告)日：2013-11-28

申请号：US13477512

申请日：2012-05-22

申请人： Tommi Ylamurto

发明人： Tommi Ylamurto

IPC分类号： H04B15/00 ,  H04B1/04 ,  H04B1/38

CPC分类号： H04B1/0057

摘要： The specification and drawings present a new apparatus and method for an RF tracking filter which may be used in RF transceivers. Instead of having band pass filter and switches in the signal path exemplary embodiments of the invention describe keeping the signal path intact for wanted frequency components and drawing selectively signal energy (e.g., corresponding to unwanted frequency components) from the signal path. This may be done with a shunt passive switch comprising multiple switches for generating commutated signals of the radio frequency signal. Behind the switches there may be a plurality of active feedback loops, each drawing a frequency dependent current for one of the one or more commutated signals and feeding the drawn current back to the passive input switch to cancel only the unwanted frequency components of the radio frequency signal.

摘要翻译： 本说明书和附图提出了可用于RF收发器中的RF跟踪滤波器的新装置和方法。 代替在信号路径中具有带通滤波器和开关，本发明的示例性实施例描述了为有用的频率分量保持信号路径不变，并且从信号路径选择性地画出信号能量（例如，对应于不期望的频率分量）。 这可以用包括用于产生射频信号的换向信号的多个开关的分流无源开关来完成。 在开关之后，可能有多个有源反馈回路，每个都产生一个或多个换向信号中的一个的频率相关电流，并将拉出的电流送回无源输入开关，以仅消除射频的不需要的频率分量 信号。

公开(公告)号：US07065154B2

公开(公告)日：2006-06-20

申请号：US09753300

申请日：2000-12-29

申请人： Tommi Ylamurto

发明人： Tommi Ylamurto

IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H04L27/368 ,  H04L27/2626

摘要： A multicarrier transmitter is shown having an embodiment of the invention. Sampling of modulated and amplified signals is done to obtain energy values for four or more symbols. Combining the energy values with the baseband in-phase and quadrature signals of the multiple carriers may result in a set of imbalance parameters, which are subsequently stored. Later baseband in phase and quadrature signals are predistorted or compensated by applying the stored imbalance parameters to produce new compensated baseband in-phase and compensated baseband quadrature signals, which are suitable for input to an inverse fast fourrier transform (IFFT) block.

摘要翻译： 示出了具有本发明的实施例的多载波发射机。 进行调制和放大信号的采样以获得四个或更多符号的能量值。 将能量值与多个载波的基带同相和正交信号组合可以导致一组不平衡参数，这些参数随后被存储。 后期的基带相位和正交信号通过应用存储的不平衡参数进行预失真或补偿，以产生新的补偿基带同相和补偿基带正交信号，适用于输入到快速四通道逆变换（IFFT）块。

公开(公告)号：US20170359692A1

公开(公告)日：2017-12-14

申请号：US15672128

申请日：2017-08-08

申请人： Lingkai Kong ,  Teymur Bakhishev ,  Tommi Ylamurto ,  Vivek Subramanian ,  Manu Seth

发明人： Lingkai Kong ,  Teymur Bakhishev ,  Tommi Ylamurto ,  Vivek Subramanian ,  Manu Seth

IPC分类号： H04W4/02 ,  H04W84/18

CPC分类号： H04W4/027 ,  H04W40/246 ,  H04W64/00 ,  H04W84/18

摘要： Systems and methods for determining locations of wireless sensor nodes in a tree network architecture having mesh-based features are disclosed herein. In one embodiment, a system includes a hub having one or more processing units and RF circuitry for transmitting and receiving communications with sensor nodes to enable bi-directional communications. The one or more processing units of the hub execute instructions to configure the system with a tree architecture for communications between the hub and the sensor nodes, and to configure the system temporarily with a mesh-based architecture for determining location information for the sensor nodes.

公开(公告)号：US09037095B2

公开(公告)日：2015-05-19

申请号：US13477512

申请日：2012-05-22

申请人： Tommi Ylamurto

发明人： Tommi Ylamurto

IPC分类号： H04B1/00

CPC分类号： H04B1/0057

摘要： The specification and drawings present a new apparatus and method for an RF tracking filter which may be used in RF transceivers. Instead of having band pass filter and switches in the signal path exemplary embodiments of the invention describe keeping the signal path intact for wanted frequency components and drawing selectively signal energy (e.g., corresponding to unwanted frequency components) from the signal path. This may be done with a shunt passive switch comprising multiple switches for generating commutated signals of the radio frequency signal. Behind the switches there may be a plurality of active feedback loops, each drawing a frequency dependent current for one of the one or more commutated signals and feeding the drawn current back to the passive input switch to cancel only the unwanted frequency components of the radio frequency signal.

摘要翻译： 本说明书和附图提出了可用于RF收发器中的RF跟踪滤波器的新装置和方法。 代替在信号路径中具有带通滤波器和开关，本发明的示例性实施例描述了为有用的频率分量保持信号路径不变，并且从信号路径选择性地画出信号能量（例如，对应于不期望的频率分量）。 这可以用包括用于产生射频信号的换向信号的多个开关的分流无源开关来完成。 在开关之后，可能有多个有源反馈回路，每个回路产生一个或多个换向信号中的一个的频率相关电流，并将拉出的电流送回无源输入开关，以仅消除无线电频率的不需要的频率分量 信号。