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    METHOD AND APPARATUS FOR REDUCTION OF TRANSMITTER-CHAIN NOISE IN PORTABLE DUPLEX TRANSCEIVERS
    1.
    发明申请
    METHOD AND APPARATUS FOR REDUCTION OF TRANSMITTER-CHAIN NOISE IN PORTABLE DUPLEX TRANSCEIVERS 审中-公开
    便携式二重收发器中减少发射机链噪声的方法和装置

    公开(公告)号：WO1997004529A1

    公开(公告)日：1997-02-06

    申请号：PCT/US1996011666

    申请日：1996-07-15

    Applicant: ERICSSON INC.

    Inventor： ERICSSON INC. ,  DOLMAN, Rodney, A. ,  LAMPE, Ross, W. ,  ZHOU, Xue-Song

    IPC: H04B01/04

    CPC classification number: H04B1/0475 ,  H03B2201/0208

    Abstract: Reduction of transmitter exciter chain generated noise from the receive band of a portable/hand-held duplex transceiver is achieved using a high output power, low-noise voltage-controlled oscillator (VCO) in the transmitter exciter chain. Using this high-power, low-noise oscillator as the RF source in the transmitter exciter chain precludes the need for the conventional buffer/driver amplifier stage and an associated inter-stage noise filter. Elimination of buffer/driver stage components and bulky inter-stage noise filter components allows complete integration of transmitter exciter chain components resulting in reduced size and cost.

    Abstract translation: 使用发射机激励器链中的高输出功率低噪声压控振荡器（VCO）来实现从便携式/手持式双工收发器的接收频带减少发射机激励器链产生的噪声。 使用这种高功率，低噪声振荡器作为发射机励磁链中的RF源，排除了传统的缓冲器/驱动放大器级和相关的级间噪声滤波器的需要。 消除缓冲器/驱动器级元件和庞大的级间噪声滤波器元件允许发射机激励器链组件的完全集成，从而减小尺寸和成本。

    DIGITAL FORMAT U.S. COMMERCIAL FM BROADCAST SYSTEM
    2.
    发明申请
    DIGITAL FORMAT U.S. COMMERCIAL FM BROADCAST SYSTEM 审中-公开
    数字格式美国商业FM广播系统

    公开(公告)号：WO2003021827A2

    公开(公告)日：2003-03-13

    申请号：PCT/US2002/021252

    申请日：2002-07-03

    Applicant: ERICSSON INC.

    Inventor： DENT, Paul ,  DOLMAN, Rodney, A.

    IPC: H04H

    CPC classification number: H04H20/33

    Abstract: A method of broadcasting commercial FM services in a digital format in at least one bitstream comprises time-division multiplexing the bitstream(s) into one or more channels comprising a data frame, and frequency modulating the data frames around a single carrier frequency into a commercial FM broadcast signal. The modulation may comprise GMSK or 8-PSK, and multiple data frame types may be interleaved. The signal is transmitted on a commerical FM broadcast station such that substantially the entire spectrum of the transmission comprises the digital data frames. The bit rate(s) of the digital bitstream(s) may be monitored, and the bitstream(s) may be reallocated to channels in the data frames based on changes in the bit rate(s). Analog and digital formats may be broadcast simultaneously on non-adjacent commercial FM broadcast carrier channels. A receiver is operative to extract and decode content from a digital format FM broadcast signal.

    Abstract translation: 在至少一个比特流中以数字格式广播商业FM服务的方法包括将比特流时分复用为包括数据帧的一个或多个信道，以及将单个载波频率周围的数据帧频率调制成商业 FM广播信号。 调制可以包括GMSK或8-PSK，并且多个数据帧类型可以被交织。 信号在商业FM广播站上传输，使得传输的整个频谱基本上包括数字数据帧。 可以监视数字比特流的比特率（s），并且可以基于比特率的变化将比特流重新分配到数据帧中的信道。 模拟和数字格式可以在非相邻商业FM广播载波信道上同时广播。 接收机可操作地从数字格式FM广播信号中提取和解码内容。

    CIRCULATOR USAGE IN TIME DIVISION DUPLEX RADIOS
    3.
    发明申请
    CIRCULATOR USAGE IN TIME DIVISION DUPLEX RADIOS 审中-公开
    循环器在时间分配双工无线电中的使用

    公开(公告)号：WO1998010525A1

    公开(公告)日：1998-03-12

    申请号：PCT/US1997013389

    申请日：1997-08-07

    Applicant: ERICSSON INC.

    Inventor： ERICSSON INC. ,  DOLMAN, Rodney, A. ,  ROGERS, Terrence, E.

    IPC: H04B01/48

    CPC classification number: H04B1/48 ,  H04B1/56

    Abstract: A communications apparatus for coupling a transmitter and receiver for duplex transmission is disclosed. The apparatus comprises a transmitter with a transmit power amplifier, a receiver with a receive filter, and a circulator with a plurality of ports, wherein the transmit power amplifier is connected to a first port of the circulator and the receiver filter is connected to a second port of the circulator. An antenna is demountably connected to a third port of the circulator. A switch alternately connects a load and the receiver to the second port of the circulator, wherein the receiver is connected to the second port of the circulator during reception of signals and the load is connected to the second port of the circulator during transmission so as to absorb power reflected by the antenna.

    Abstract translation: 公开了一种用于耦合用于双工传输的发射机和接收机的通信装置。 该装置包括具有发射功率放大器的发射机，具有接收滤波器的接收机和具有多个端口的循环器，其中发射功率放大器连接到循环器的第一端口，并且接收器滤波器连接到第二 环行器端口。 天线可拆卸地连接到循环器的第三端口。 开关将负载和接收器交替地连接到环行器的第二端口，其中接收器在接收信号期间连接到环行器的第二端口，并且负载在传输期间连接到循环器的第二端口，以便 吸收由天线反射的功率。

    RECEIVER IF SYSTEM WITH ACTIVE FILTERS
    6.
    发明授权
    RECEIVER IF SYSTEM WITH ACTIVE FILTERS 失效
    在有源滤波器中频系统

    公开(公告)号：EP0965167B1

    公开(公告)日：2002-10-23

    申请号：EP98904856.6

    申请日：1998-02-11

    Applicant: Ericsson, Inc.

    Inventor： LAMPE, Ross, W. ,  GILLETTE, John, T. ,  DOLMAN, Rodney, A. ,  MONTALVO, Antonio

    IPC: H03G3/30

    CPC classification number: H03G3/3068

    Abstract: A high dynamic range receiver IF system using limited dynamic range IF filters is disclosed. A variable gain amplifier amplifies a first IF signal. The amplified first IF signal is then applied to an image suppression mixer for suppressing an image component of the amplified first IF signal to provide adequate image suppression for a radio system, wherein the image suppression mixer outputting an image suppressed second IF signal. An active bandpass filter then filters the unwanted components from the second IF signal. The filtered signal is then hard limited in a limiting amplifier which outputs a limited IF signal. A logarithmic detector then provides a received signal strength indicator.

    CIRCULATOR USAGE IN TIME DIVISION DUPLEX RADIOS
    8.
    发明授权
    CIRCULATOR USAGE IN TIME DIVISION DUPLEX RADIOS 失效
    环行IN TIME全双工无线通信系统使用

    公开(公告)号：EP0923811B1

    公开(公告)日：2001-10-31

    申请号：EP97938071.4

    申请日：1997-08-07

    Applicant: ERICSSON INC.

    Inventor： DOLMAN, Rodney, A. ,  ROGERS, Terrence, E.

    IPC: H04B1/48

    CPC classification number: H04B1/48 ,  H04B1/56

    Abstract: A communications apparatus for coupling a transmitter and receiver for duplex transmission is disclosed. The apparatus comprises a transmitter with a transmit power amplifier, a receiver with a receive filter, and a circulator with a plurality of ports, wherein the transmit power amplifier is connected to a first port of the circulator and the receiver filter is connected to a second port of the circulator. An antenna is demountably connected to a third port of the circulator. A switch alternately connects a load and the receiver to the second port of the circulator, wherein the receiver is connected to the second port of the circulator during reception of signals and the load is connected to the second port of the circulator during transmission so as to absorb power reflected by the antenna.

    CIRCULATOR USAGE IN TIME DIVISION DUPLEX RADIOS
    9.
    发明公开
    CIRCULATOR USAGE IN TIME DIVISION DUPLEX RADIOS 失效
    环行IN TIME全双工无线通信系统使用

    公开(公告)号：EP0923811A1

    公开(公告)日：1999-06-23

    申请号：EP97938071.0

    申请日：1997-08-07

    Applicant: ERICSSON INC.

    Inventor： DOLMAN, Rodney, A. ,  ROGERS, Terrence, E.

    IPC: H04B1

    CPC classification number: H04B1/48 ,  H04B1/56

    Abstract: A communications apparatus for coupling a transmitter and receiver for duplex transmission is disclosed. The apparatus comprises a transmitter with a transmit power amplifier, a receiver with a receive filter, and a circulator with a plurality of ports, wherein the transmit power amplifier is connected to a first port of the circulator and the receiver filter is connected to a second port of the circulator. An antenna is demountably connected to a third port of the circulator. A switch alternately connects a load and the receiver to the second port of the circulator, wherein the receiver is connected to the second port of the circulator during reception of signals and the load is connected to the second port of the circulator during transmission so as to absorb power reflected by the antenna.

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