公开(公告)号：US07613433B2

公开(公告)日：2009-11-03

申请号：US10741714

申请日：2003-12-19

申请人： Bojan Subasic ,  Mathew A. Rybicki

发明人： Bojan Subasic ,  Mathew A. Rybicki

IPC分类号： H04B1/04

CPC分类号： H04B1/0475

摘要： A method for reducing LO leakage in a radio frequency transmitter begins by producing analog outbound signals from digital outbound signals that represent transmit data. The processing continues by amplifying the analog outbound signals to produce amplified analog outbound signals. The process then continues by mixing the amplified analog outbound signals with a local oscillation to produce mixed signals having an LO leakage component. The processing then continues by attenuating the mixed signals having the LO leakage component to produce mixed signals having reduced LO leakage.

摘要翻译： 一种用于降低射频发射器中的LO泄漏的方法是通过从表示发射数据的数字出站信号产生模拟出站信号开始的。 该处理继续通过放大模拟出站信号以产生放大的模拟出站信号。 然后，该过程通过将放大的模拟出站信号与本地振荡混合来产生具有LO泄漏分量的混合信号。 然后通过衰减具有LO泄漏分量的混合信号来继续处理以产生具有减小的LO泄漏的混合信号。

公开(公告)号：US20050136880A1

公开(公告)日：2005-06-23

申请号：US10741716

申请日：2003-12-19

申请人： Bojan Subasic ,  Mathew Rybicki

发明人： Bojan Subasic ,  Mathew Rybicki

IPC分类号： H04B1/00 ,  H04B1/16

CPC分类号： H04B1/0071

摘要： A radio frequency receiver front-end includes a low noise amplifier, a mixing stage, and a selectable channel filter. The low noise amplifier is operably coupled to amplify inbound RF signals to produce amplified inbound RF signals. The mixing stage is operably coupled to mix amplified inbound RF signals with a 1st local oscillation to produce a 1st intermediate frequency (IF) signal. The selectable channel filter is operably coupled to pass a 1st channel of the 1st IF signal when a channel select signal is in a 1st state and to pass a 2nd channel of the 1st IF signal when the channel select signal is in a 2nd state to produce a selected channel.

摘要翻译： 射频接收机前端包括低噪声放大器，混合级和可选择的通道滤波器。 低噪声放大器可操作地耦合以放大入站RF信号，以产生放大的入站RF信号。 混合级可操作地耦合以将放大的入站RF信号与1μs本地振荡混频以产生中频（IF）信号。 可选择的通道滤波器可操作地耦合，以便当通道选择信号处于第一信号时，通过第一中频信号的第一信道， 状态，并且当通道选择信号处于第二个状态时，通过1 IF信号的2 通道以产生选定的 渠道。

公开(公告)号：US20050032497A1

公开(公告)日：2005-02-10

申请号：US10944509

申请日：2004-09-17

申请人： James Girardeau ,  Paul Astrachan ,  Mathew Rybicki ,  Bojan Subasic

发明人： James Girardeau ,  Paul Astrachan ,  Mathew Rybicki ,  Bojan Subasic

IPC分类号： H04B7/08 ,  H04B1/00 ,  H04B1/06 ,  H04B7/00

CPC分类号： H04B7/0857

摘要： A radio receiver includes a first diversity antenna structure, a second diversity antenna structure, a first RF receiver section, a second RF receiver section, a combining module, and a baseband processing module. The first diversity antenna structure includes a plurality of first antennas and each of the plurality of first antennas is operably coupled to receive inbound radio frequency (RF) signals, wherein the first diversity antenna structure provides the received inbound RF signals from one of the plurality of first antennas based on a first antenna selection signal to produce first received inbound RF signals. The second diversity antenna structure includes a plurality of second antennas and each of the plurality of second antennas is operably coupled to receive the inbound RF signals, wherein the second diversity antenna structure provides the received inbound RF signals from one of the plurality of second antennas based on a second antenna selection signal to produce second received inbound RF signals. The first RF receiver section is operably coupled to convert the first received inbound RF signals into first inbound baseband signals. The second RF receiver section is operably coupled to convert the second received inbound RF signals into second inbound baseband signals. The combining module is operably coupled to combine the first and second inbound baseband signals to produce inbound baseband signals. The baseband processing module is operably coupled to convert the inbound baseband signals into inbound data and to produce the first and second antenna selection signals based on signal integrity of the first and second diversity antenna structures, respectively.

摘要翻译： 无线电接收机包括第一分集天线结构，第二分集天线结构，第一RF接收机部分，第二RF接收机部分，组合模块和基带处理模块。 所述第一分集天线结构包括多个第一天线，并且所述多个第一天线中的每一个可操作地耦合以接收入站射频（RF）信号，其中所述第一分集天线结构提供从所述多个 基于第一天线选择信号的第一天线以产生第一接收的入站RF信号。 第二分集天线结构包括多个第二天线，并且多个第二天线中的每一个可操作地耦合以接收入站RF信号，其中第二分集天线结构从多个第二天线之一提供接收的入站RF信号 在第二天线选择信号上产生第二接收的入站RF信号。 第一RF接收机部分可操作地耦合以将第一接收的入站RF信号转换成第一入站基带信号。 第二RF接收机部分可操作地耦合以将第二接收的入站RF信号转换成第二入站基带信号。 组合模块可操作地耦合以组合第一和第二入站基带信号以产生入站基带信号。 基带处理模块可操作地耦合以将入站基带信号转换成入站数据，并且分别基于第一和第二分集天线结构的信号完整性产生第一和第二天线选择信号。