CN1071070C - 有单个锁相环的收发机设备及其方法 - Google Patents

有单个锁相环的收发机设备及其方法 Download PDF

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CN1071070C
CN1071070C CN96104452A CN96104452A CN1071070C CN 1071070 C CN1071070 C CN 1071070C CN 96104452 A CN96104452 A CN 96104452A CN 96104452 A CN96104452 A CN 96104452A CN 1071070 C CN1071070 C CN 1071070C
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frequency
band pass
pass filter
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CN1140941A (zh
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朴在善
金城宇
朴正圭
朴享元
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Samsung Electronics Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40Circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40Circuits
    • H04B1/403Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/405Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with multiple discrete channels

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Abstract

一种收发方法和设备,只用一个本机振荡器提供上/下变频用的本振频率和调制/解调用的载频。其设备有:基准信号发生器;锁相环,供锁相基准信号发生器的输出;信号发生器,按锁相环输出产生信号,并提供给调制和解调电路中的移相器;第一和第二倍频器,供倍增信号发生器的输出;第一和第二带通滤波器,供分别对第一和第二倍频器的输出进行滤波;第一和第二放大器,供分别放大第一和第二带通滤波器的输出,并将其分别提供给下上变频混合器。

Description

有单个锁相环的收发机设备及其方法
本发明涉及无线电通信系统中使用的一种收发设备,更具体说涉及只有一个锁相环电路的一种收发方法和收发设备,这种方法和设备能利用一个频率振荡器产生的频率作为上变频的本机振荡频率和发送模式下载频的基准频率,并作为下变频的本机振荡频率和接收模式下调制/解调用的载频。
1980年6月8日授予Biethan的美国专利4,212,013号公开了一种一般的双工收发设备,其中的发送机和接收机只采用一个振荡器,从而大大简化了技术上的问题和节省了财务上的开支。然而,由于发送解调器和接收滤波器还应分别采用独立的振荡器,因而在结构上还有进一步简化的必要。
1991年6月30日授予Dannenberg的美国专利5,036,327号公开了一种采用单振荡器移频键控系统的雷达收发机,其中声频载波利用视频解调的稳定高频进行上变频,作为经稳定线性解调的声频载波而输出。这种方法已应用在声频解调信号与视频解调信号混合的信号传输中。
图1示出了现有技术的一种无线电通信系统。参看图1,传输数据I和Q转换成模拟信号之后,通过低通滤波器(以下称为“LPF”)173和181,进而从模拟信号中滤除较高频率的分量。低通滤波器173和181的输出输入到正交解调电路202中的正交混合器171和179。在此期间,混合器171和179分别收到0度相位和90度相位的信号,这些信号是信号在移相器177中分成0度相位和90度相位产生的。该信号是从信号发生器73借助锁相环(以下称为“PLL”)71使其以基准信号发生器41产生的基准信号锁相产生的。这样,混合器171和179将低通滤波器173和181的输出与移相器177的输出混合,再由组合器169将由此得出的信号加以组合,作为经正交解调的信号输出。经正交解调的信号由放大器167放大,再通过带通滤波器(以下称为“BPF”)165。这样,经正交调制的信号只有经选择的频带才被滤除。带通滤波器165输出的经滤波的信号再次被放大到预定的程度,然后传送给上变频混合器161。混合器161接收信号发生器49输出的由PLL47以基准信号发生器41输出的基准信号锁相的输出信号,从而对放大器163的输出进行上变频。经上变频的信号通过BPF154传送给功率放大器153。功率放大器153输出的信号经开关105和BPF103通过天线101发送出去。
现在看接收工作过程。从天线101收到的信号经BPF103和开关105传到低噪声放大器107,由低噪声放大器107将收到的弱信号放大10-30分贝。BPF109从放大的信号中只提取所需的接收频带,再提供给下变频混合器111。混合器111还接收信号发生器37的输出,该输出由PLL 39以基准信号发生器41产生的基准信号锁相。于是混合器111输出Nf1+/-Mf2的信号(其中N和M都是整数)。混合器111的输出信号加到BPF113上,只有频带f1-f2通过BPF113。这样,本机振荡频率f2使接收信号频率f1降低,使其成为f1-f2的中频。此中频再由放大器115放大,然后加到正交调制电路201中的分配器117。分配器117将放大的信号分配并加到调制混合器119和131上。在此期间,混合器119和131分别收到0度相位和90度相位的信号,这些信号是由90度移相器127将一信号分成0度和90度产生的。该信号是从信号发生器43通过PLL45使其以基准信号发生器41产生的基准信号锁相而产生的。混合器119和131的输出信号通过LPF121和133,从其中滤掉频率较高的噪声。接着,PLF121和133的输出经放大器123和135放大后传送给模/数(A/D)转换器125和137,于是产生数字化了的信号I和Q。综上所述,由于一般的方法采用多个频率源,例如基准信号发生器、信号发生器和PLL,因而不能实现系统的小型化和降低成本。
因此,本发明的目的是提供一种只用一个本机振荡器的既能提供上变频/下变频用的本机振荡频率又能提供调制/解调用的载频的收发方法和收发设备。
为达到本发明的上述目的,本发明的用在具有解调器、载频发生器、滤波器、放大器和天线的无线电通信系统中的收发设备被构制成使一个本机振荡器输出的振荡频率,经倍增到预定频率后作为上变频/下变频用的本机振荡频率,和作为调制/解调用的载频。
按照本发明,提供了一种用单一频率产生供发送或接收信号上/下变频用的本机振荡频率的方法,其中所述单一频率是由包含混合器、移相器、组合器或分配器的调制器或解调器的基准信号发生器产生的,该方法包括:
用所述基准信号发生器产生的信号激发而产生信号;
使所产生的信号倍频B倍而产生供所述调制器发送的上变频用的本机振荡频率;和
使所产生的信号倍频A倍而产生供所述解调器接收的下变频用的本机振荡频率。
按照本发明,还提供了无线电通信系统中用的一种收发设备,所述无线电通信系统有一个上变频混合器、一个下变频混合器、一个调制电路和一个解调电路,其中调制电路包括一个分配器、若干混合器和一个移相器;解调电路包括一个组合器、若干混合器和一个移相器;所述收发设备包括:
一个基准信号发生器,供产生所述无线电通信系统的基准信号;
一个锁相环,供将所述基准信号发生器的输出锁相到预定频率;
一个信号发生器,供根据所述锁相环的输出产生信号,并将该信号提供给所述调制电路和所述解调电路中的所述移相器;
第一倍频器,用以将所述信号发生器的输出倍增到一给定倍数;
第一带通滤波器,用于对所述第一倍频器的输出进行带通滤波;
第一放大器,供放大所述第一带通滤波器的输出,并将其提供给所述下变频混合器;
第二倍频器,用以将所述信号发生器的输出倍增到另一给定倍数;
第二带通滤波器,用于对所述第二倍频器的输出进行带通滤波;和
第二放大器,供放大所述第二带通滤波器的输出,并将其提供给所述上变频混合器。
下面参看附图详细说明本发明的最佳实施例。附图中:
图1是现有技术的无线电通信系统图;
图2是本发明一个最佳实施例的无线电通信系统图;
图3是本发明另一个最佳实施例的无线电通信系统图。
参看图2。图中的电路是无线电通信系统的一个电路。该无线电通信系统有一个上变频混合器、一个下变频混合器、一个调制电路和一个解调电路。调制电路包括一个分配器、若干混合器和一个移相器。解调电路包括一个组合器、若干混合器和一个移相器。所述无线电通信系统的电路由下列部分组成:一个基准信号发生器,供产生无线电通信系统的基准信号;一个锁相环,供将基准信号发生器的输出锁相到预定的频率;一个信号发生器,供根据锁相环的输出产生信号,并将信号提供给调制电路和解调电路中的移相器;第一倍频器,用以将信号发生器的输出倍增到一给定倍数;第一带通滤波器,用于对第一倍频器的输出进行带通滤波;第一放大器,供放大第一带通滤波器的输出,并将其提供给下变频混合器;第二倍频器,用以将信号发生器的输出倍增到另一给定倍数;第二带通滤波器,用于对第二倍频器的输出进行带通滤波;和第二放大器,供放大第二带通滤波器的输出,并将其提供给上变频混合器。
现在参看图2说明本发明的一个最佳实施例。传输数据I和Q经数/模(D/A)转换器175和183传送给LPF173和181,从而从传输数据I和Q中滤除高频分量,这些信号输入到解调器202中的正交解调混合器171和179中。在此期间,混合器171和179分别收到0度相位信号和90度相位信号,这些信号是由移相器177将一信号分成0度和90度产生的。该信号是从信号发生器147通过PLL149使其以基准信号发生器151锁相而产生的。如此得出的通过混合器171和179的信号在组合器169中经过组合,作为正交解调信号输出。经正交解调的信号通过放大器167放大,再通过BPF165进行带通滤波。BPF165输出的信号再经过放大,传送给上变频混合器161。信号发生器147输出的经PLL149使其以基准信号发生器151锁相的信号在B倍频器159中被倍频至B倍。BPF157只对B*f10的信号滤波,其输出经放大器155放大,传送给混合器161。用频率地f10正交解调过的信号用频率B*f10进行上变频,只有混合信号的信号B*f10+f10通过BPF154滤波,从而使BPF154的输出频率变为(B+1)*f10。BPF154的输出经功率放大器153放大后,再经开关105和BPF103通过天线101发送出去。
现在看接收工作过程。接收信号从天线101通过BPF103和开关105加到低噪声放大器107上。由低噪声放大器107放大的信号通过BPF109传送给下变频混合器111。信号发生器147的输出信号由PLL149使其以基准信号发生器151锁相,被A倍频器145倍频至A倍。BPF143滤波器只对A*f10的信号滤波,其输出经放大器141放大,作为本机振荡频率传送给混合器111。只有收到的频率frf与本机振荡频率之间的差频frf-A*f10是由BPF113滤波的。BPF113的输出经放大器115放大后传送给调制器201中的分配器117。分配器117将放大的信号分配到调制混合器119和131。频率f10加到移相器127上,0相位和90度相位信号分别加到混合器119和131上。调制器201中调制的信号加到LPF121和133,并从调制的信号中除去高频分量。如此得出的信号经放大器125和135放大后作为数据I和Q通过模/数转换器125和137输出。
现在参看图3。图3的组成与图2的相同,只是倍减器203用以倍减信号发生器147的输出,并将其提供给移相器127和177。就是说,在图2中,信号一方面解调到频率f10,而又调制到频率f10,但在图3中,信号发生器147产生的信号则是在经倍减器203倍减之后加到移相器127上的,且频率f10在A倍频器145倍频后通过BPF143和放大器141加到下变频混合器111上。发送机和接收机的频率f10的值彼此不同。即,发送过程的解调频率f10用下式表示:
B*f10+f10=frf(其中frf为传输频率)
f10=frf/(B+1)而接收过程的调制频率用下式表示:
frf-A*f10=f10/P
frf=f10/P+A*f10
frf=f10(A+1/P)
f10=(P/(P*A+1))*frf
假设frf=2.5吉赫,且B=4,解调频率f10=500兆赫,而在接收过程中,若P=4且A=5,则频率f10约为476兆赫,调制频率f10/P约为119兆赫。综上所述,本发明通过消除因采用不同频率而产生的干扰可以减小电路内的电气干扰。此外,图2图3中所示的电路较为简单,从而进一步降低了成本。

Claims (4)

1.一种用单一频率产生供发送或接收信号上/下变频用的本机振荡频率的方法,其中所述单一频率是由包含混合器、移相器、组合器或分配器的调制器或解调器的基准信号发生器产生的,该方法包括:
用所述基准信号发生器产生的信号激发而产生信号;
使所产生的信号倍频B倍而产生供所述调制器发送的上变频用的本机振荡频率;和
使所产生的信号倍频A倍而产生供所述解调器接收的下变频用的本机振荡频率。
2.如权利要求1所述的方法,其特征在于,将用所述基准信号发生器产生的信号激发而产生的信号提供给所述调制器的移相器,同时将该激发产生的信号除以P并提供给所述解调器的移相器。
3.无线电通信系统中用的一种收发设备,所述无线电通信系统有一个上变频混合器、一个下变频混合器、一个调制电路和一个解调电路,其中调制电路包括一个分配器、若干混合器和一个移相器;解调电路包括一个组合器、若干混合器和一个移相器;所述收发设备包括:
一个基准信号发生器,供产生所述无线电通信系统的基准信号;
一个锁相环,供将所述基准信号发生器的输出锁相到预定频率;
一个信号发生器,供根据所述锁相环的输出产生信号,并将该信号提供给所述调制电路和所述解调电路中的所述移相器;
第一倍频器,用以将所述信号发生器的输出倍增到一给定倍数;
第一带通滤波器,用于对所述第一倍频器的输出进行带通滤波;
第一放大器,供放大所述第一带通滤波器的输出,并将其提供给所述下变频混合器;
第二倍频器,用以将所述信号发生器的输出倍增到另一给定倍数;
第二带通滤波器,用于对所述第二倍频器的输出进行带通滤波;和
第二放大器,供放大所述第二带通滤波器的输出,并将其提供给所述上变频混合器。
4.如权利要求3所述的设备,其特征在于,还包括一个倍减器,供倍减所述信号发生器的输出,并将其提供给所述调制电路和所述解调电路中的所述移相器。
CN96104452A 1995-04-13 1996-04-12 有单个锁相环的收发机设备及其方法 Expired - Fee Related CN1071070C (zh)

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Families Citing this family (241)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4236059B2 (ja) * 1997-03-12 2009-03-11 エヌエックスピー ビー ヴィ 周波数変換回路
JP3360004B2 (ja) * 1997-03-20 2002-12-24 松下電器産業株式会社 無線受信装置
JP3825540B2 (ja) * 1997-09-05 2006-09-27 松下電器産業株式会社 受信機および送受信機
US6163710A (en) * 1997-10-20 2000-12-19 Ericsson, Inc. Method and apparatus for compliance to multiple frequency plans
EP0958661A1 (en) * 1997-11-06 1999-11-24 Koninklijke Philips Electronics N.V. A transceiver and a telecommunication system having a transceiver
JP2001510672A (ja) * 1997-12-05 2001-07-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 通信システム、通信装置及び周波数シンセサイザ
US6307896B1 (en) * 1998-04-03 2001-10-23 Tektronix, Inc. Instrumentation receiver for digitally modulated radio frequency signals
KR100427854B1 (ko) * 1998-10-22 2004-04-28 인피니언 테크놀로지스 아게 주파수 안정화된 송/수신 회로
US7548726B1 (en) * 1999-10-21 2009-06-16 Broadcom Corporation Adaptive radio transceiver with a bandpass filter
US7076217B1 (en) * 1999-11-23 2006-07-11 Micro Linear Corporation Integrated radio transceiver
US6987816B1 (en) 1999-11-23 2006-01-17 Micro Linear Corporation Iris data recovery algorithms
US6985541B1 (en) 1999-11-23 2006-01-10 Micor Linear Corporation FM demodulator for a low IF receiver
US7027792B1 (en) 1999-11-23 2006-04-11 Micro Linear Corporation Topology for a single ended input dual balanced mixer
US6631170B1 (en) * 1999-12-03 2003-10-07 Nokia Corporation Radio frequency receiver
JP2001230695A (ja) 2000-02-16 2001-08-24 Nec Corp 無線機及びそれに使用する周波数変換方法
US6678503B1 (en) * 2000-05-17 2004-01-13 Intersil Americas Inc. Apparatus for radio frequency processing with dual modulus synthesizer
FI20001774A (fi) * 2000-08-10 2002-02-11 Nokia Networks Oy Lähetinvastaanottimen testaaminen
ATE422729T1 (de) * 2000-12-28 2009-02-15 Renesas Tech Corp Pll-schaltung mit reduzierter einschwingzeit
CN1215649C (zh) * 2001-01-12 2005-08-17 旋永南 一种高频信号接收和发送的处理方法
US8116358B2 (en) * 2001-01-26 2012-02-14 Viasat, Inc. Single oscillator transceiver
US6996165B2 (en) * 2001-01-26 2006-02-07 U.S. Monolithics, L.L.C. Single oscillator transceiver frequency plan
US6987954B2 (en) * 2001-05-15 2006-01-17 Research In Motion Limited Feedback compensation detector for a direct conversion transmitter
US6876844B1 (en) * 2001-06-29 2005-04-05 National Semiconductor Corporation Cascading-synchronous mixer and method of operation
JP2003078433A (ja) * 2001-09-05 2003-03-14 Alps Electric Co Ltd 周波数変換回路
US6850748B2 (en) * 2002-07-31 2005-02-01 Gct Semiconductor, Inc. RF front end with reduced carrier leakage
US6844787B2 (en) * 2002-09-13 2005-01-18 Stratex Networks, Inc. Method and apparatus for re-modulation using zero IF
US6670900B1 (en) * 2002-10-25 2003-12-30 Koninklijke Philips Electronics N.V. Quadrature mismatch compensation
US6963620B2 (en) * 2002-10-31 2005-11-08 Gct Semiconductor, Inc. Communication transmitter using offset phase-locked-loop
US20050265483A1 (en) * 2004-05-25 2005-12-01 Berkana Wireless, Inc. Digital noise coupling reduction and variable intermediate frequency generation in mixed signal circuits
KR101382795B1 (ko) * 2007-09-20 2014-04-08 엘지이노텍 주식회사 Rfid 송수신 장치
US8385855B2 (en) * 2008-11-07 2013-02-26 Viasat, Inc. Dual conversion transmitter with single local oscillator
JP5595883B2 (ja) * 2010-11-29 2014-09-24 株式会社東芝 無線通信装置
CN102075208B (zh) * 2010-12-31 2013-07-31 东南大学 一种低功耗射频前端
CN102611476A (zh) * 2011-01-20 2012-07-25 中国科学院微电子研究所 用于60GHz无线通信的两次变频结构收发机
CN102611475A (zh) * 2011-01-20 2012-07-25 中国科学院微电子研究所 用于60GHz无线通信的直接变频收发机
JP2014072859A (ja) * 2012-10-01 2014-04-21 Toshiba Corp 信号発生装置および無線機
US9113347B2 (en) 2012-12-05 2015-08-18 At&T Intellectual Property I, Lp Backhaul link for distributed antenna system
US10009065B2 (en) * 2012-12-05 2018-06-26 At&T Intellectual Property I, L.P. Backhaul link for distributed antenna system
KR102139976B1 (ko) * 2013-11-25 2020-08-03 삼성전자주식회사 리더 수신기 및 이를 포함하는 리더 송수신 장치
US9692101B2 (en) 2014-08-26 2017-06-27 At&T Intellectual Property I, L.P. Guided wave couplers for coupling electromagnetic waves between a waveguide surface and a surface of a wire
US9628854B2 (en) 2014-09-29 2017-04-18 At&T Intellectual Property I, L.P. Method and apparatus for distributing content in a communication network
US9685992B2 (en) 2014-10-03 2017-06-20 At&T Intellectual Property I, L.P. Circuit panel network and methods thereof
US9503189B2 (en) 2014-10-10 2016-11-22 At&T Intellectual Property I, L.P. Method and apparatus for arranging communication sessions in a communication system
US9973299B2 (en) 2014-10-14 2018-05-15 At&T Intellectual Property I, L.P. Method and apparatus for adjusting a mode of communication in a communication network
US9564947B2 (en) 2014-10-21 2017-02-07 At&T Intellectual Property I, L.P. Guided-wave transmission device with diversity and methods for use therewith
US9780834B2 (en) 2014-10-21 2017-10-03 At&T Intellectual Property I, L.P. Method and apparatus for transmitting electromagnetic waves
US9520945B2 (en) 2014-10-21 2016-12-13 At&T Intellectual Property I, L.P. Apparatus for providing communication services and methods thereof
US9800327B2 (en) 2014-11-20 2017-10-24 At&T Intellectual Property I, L.P. Apparatus for controlling operations of a communication device and methods thereof
US10411920B2 (en) 2014-11-20 2019-09-10 At&T Intellectual Property I, L.P. Methods and apparatus for inducing electromagnetic waves within pathways of a cable
US10243784B2 (en) 2014-11-20 2019-03-26 At&T Intellectual Property I, L.P. System for generating topology information and methods thereof
US9742462B2 (en) 2014-12-04 2017-08-22 At&T Intellectual Property I, L.P. Transmission medium and communication interfaces and methods for use therewith
US10340573B2 (en) 2016-10-26 2019-07-02 At&T Intellectual Property I, L.P. Launcher with cylindrical coupling device and methods for use therewith
US10009067B2 (en) 2014-12-04 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for configuring a communication interface
US9997819B2 (en) 2015-06-09 2018-06-12 At&T Intellectual Property I, L.P. Transmission medium and method for facilitating propagation of electromagnetic waves via a core
US9461706B1 (en) 2015-07-31 2016-10-04 At&T Intellectual Property I, Lp Method and apparatus for exchanging communication signals
US9954287B2 (en) 2014-11-20 2018-04-24 At&T Intellectual Property I, L.P. Apparatus for converting wireless signals and electromagnetic waves and methods thereof
US11025460B2 (en) 2014-11-20 2021-06-01 At&T Intellectual Property I, L.P. Methods and apparatus for accessing interstitial areas of a cable
US9876570B2 (en) 2015-02-20 2018-01-23 At&T Intellectual Property I, Lp Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
US10224981B2 (en) 2015-04-24 2019-03-05 At&T Intellectual Property I, Lp Passive electrical coupling device and methods for use therewith
US9705561B2 (en) 2015-04-24 2017-07-11 At&T Intellectual Property I, L.P. Directional coupling device and methods for use therewith
US9793954B2 (en) 2015-04-28 2017-10-17 At&T Intellectual Property I, L.P. Magnetic coupling device and methods for use therewith
US9871282B2 (en) 2015-05-14 2018-01-16 At&T Intellectual Property I, L.P. At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric
US10714803B2 (en) 2015-05-14 2020-07-14 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
US10679767B2 (en) 2015-05-15 2020-06-09 At&T Intellectual Property I, L.P. Transmission medium having a conductive material and methods for use therewith
US9917341B2 (en) 2015-05-27 2018-03-13 At&T Intellectual Property I, L.P. Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves
US9912381B2 (en) 2015-06-03 2018-03-06 At&T Intellectual Property I, Lp Network termination and methods for use therewith
US10812174B2 (en) 2015-06-03 2020-10-20 At&T Intellectual Property I, L.P. Client node device and methods for use therewith
US10756805B2 (en) 2015-06-03 2020-08-25 At&T Intellectual Property I, L.P. Client node device with frequency conversion and methods for use therewith
US10154493B2 (en) 2015-06-03 2018-12-11 At&T Intellectual Property I, L.P. Network termination and methods for use therewith
US9913139B2 (en) 2015-06-09 2018-03-06 At&T Intellectual Property I, L.P. Signal fingerprinting for authentication of communicating devices
US10142086B2 (en) 2015-06-11 2018-11-27 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
US9608692B2 (en) 2015-06-11 2017-03-28 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
US9865911B2 (en) 2015-06-25 2018-01-09 At&T Intellectual Property I, L.P. Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium
US9640850B2 (en) 2015-06-25 2017-05-02 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium
US9509415B1 (en) 2015-06-25 2016-11-29 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a fundamental wave mode on a transmission medium
US10129057B2 (en) 2015-07-14 2018-11-13 At&T Intellectual Property I, L.P. Apparatus and methods for inducing electromagnetic waves on a cable
US10033107B2 (en) 2015-07-14 2018-07-24 At&T Intellectual Property I, L.P. Method and apparatus for coupling an antenna to a device
US10742243B2 (en) 2015-07-14 2020-08-11 At&T Intellectual Property I, L.P. Method and apparatus for coupling an antenna to a device
US10170840B2 (en) 2015-07-14 2019-01-01 At&T Intellectual Property I, L.P. Apparatus and methods for sending or receiving electromagnetic signals
US9847566B2 (en) 2015-07-14 2017-12-19 At&T Intellectual Property I, L.P. Method and apparatus for adjusting a field of a signal to mitigate interference
US10044409B2 (en) 2015-07-14 2018-08-07 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
US9882257B2 (en) 2015-07-14 2018-01-30 At&T Intellectual Property I, L.P. Method and apparatus for launching a wave mode that mitigates interference
US9853342B2 (en) 2015-07-14 2017-12-26 At&T Intellectual Property I, L.P. Dielectric transmission medium connector and methods for use therewith
US9722318B2 (en) 2015-07-14 2017-08-01 At&T Intellectual Property I, L.P. Method and apparatus for coupling an antenna to a device
US10090606B2 (en) 2015-07-15 2018-10-02 At&T Intellectual Property I, L.P. Antenna system with dielectric array and methods for use therewith
US9608740B2 (en) 2015-07-15 2017-03-28 At&T Intellectual Property I, L.P. Method and apparatus for launching a wave mode that mitigates interference
US9749053B2 (en) 2015-07-23 2017-08-29 At&T Intellectual Property I, L.P. Node device, repeater and methods for use therewith
US10784670B2 (en) 2015-07-23 2020-09-22 At&T Intellectual Property I, L.P. Antenna support for aligning an antenna
US9871283B2 (en) 2015-07-23 2018-01-16 At&T Intellectual Property I, Lp Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration
US9967173B2 (en) 2015-07-31 2018-05-08 At&T Intellectual Property I, L.P. Method and apparatus for authentication and identity management of communicating devices
US10020587B2 (en) 2015-07-31 2018-07-10 At&T Intellectual Property I, L.P. Radial antenna and methods for use therewith
US10009901B2 (en) 2015-09-16 2018-06-26 At&T Intellectual Property I, L.P. Method, apparatus, and computer-readable storage medium for managing utilization of wireless resources between base stations
US10009063B2 (en) 2015-09-16 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal
US9769128B2 (en) 2015-09-28 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for encryption of communications over a network
US10665942B2 (en) 2015-10-16 2020-05-26 At&T Intellectual Property I, L.P. Method and apparatus for adjusting wireless communications
US10051483B2 (en) 2015-10-16 2018-08-14 At&T Intellectual Property I, L.P. Method and apparatus for directing wireless signals
US9912419B1 (en) 2016-08-24 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for managing a fault in a distributed antenna system
US9860075B1 (en) 2016-08-26 2018-01-02 At&T Intellectual Property I, L.P. Method and communication node for broadband distribution
US11032819B2 (en) 2016-09-15 2021-06-08 At&T Intellectual Property I, L.P. Method and apparatus for use with a radio distributed antenna system having a control channel reference signal
US10135147B2 (en) 2016-10-18 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via an antenna
US10135146B2 (en) 2016-10-18 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via circuits
US10340600B2 (en) 2016-10-18 2019-07-02 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via plural waveguide systems
US10374316B2 (en) 2016-10-21 2019-08-06 At&T Intellectual Property I, L.P. System and dielectric antenna with non-uniform dielectric
US9991580B2 (en) 2016-10-21 2018-06-05 At&T Intellectual Property I, L.P. Launcher and coupling system for guided wave mode cancellation
US10811767B2 (en) 2016-10-21 2020-10-20 At&T Intellectual Property I, L.P. System and dielectric antenna with convex dielectric radome
US10291334B2 (en) 2016-11-03 2019-05-14 At&T Intellectual Property I, L.P. System for detecting a fault in a communication system
US10225025B2 (en) 2016-11-03 2019-03-05 At&T Intellectual Property I, L.P. Method and apparatus for detecting a fault in a communication system
US10340601B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Multi-antenna system and methods for use therewith
US10178445B2 (en) 2016-11-23 2019-01-08 At&T Intellectual Property I, L.P. Methods, devices, and systems for load balancing between a plurality of waveguides
US10361489B2 (en) 2016-12-01 2019-07-23 At&T Intellectual Property I, L.P. Dielectric dish antenna system and methods for use therewith
US10382976B2 (en) 2016-12-06 2019-08-13 At&T Intellectual Property I, L.P. Method and apparatus for managing wireless communications based on communication paths and network device positions
US10135145B2 (en) 2016-12-06 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for generating an electromagnetic wave along a transmission medium
US10694379B2 (en) 2016-12-06 2020-06-23 At&T Intellectual Property I, L.P. Waveguide system with device-based authentication and methods for use therewith
US10727599B2 (en) 2016-12-06 2020-07-28 At&T Intellectual Property I, L.P. Launcher with slot antenna and methods for use therewith
US10755542B2 (en) 2016-12-06 2020-08-25 At&T Intellectual Property I, L.P. Method and apparatus for surveillance via guided wave communication
US10819035B2 (en) 2016-12-06 2020-10-27 At&T Intellectual Property I, L.P. Launcher with helical antenna and methods for use therewith
US10205212B2 (en) 2016-12-06 2019-02-12 At&T Intellectual Property I, L.P. Methods and apparatus for adjusting a phase of electromagnetic waves
US10637149B2 (en) 2016-12-06 2020-04-28 At&T Intellectual Property I, L.P. Injection molded dielectric antenna and methods for use therewith
US10020844B2 (en) 2016-12-06 2018-07-10 T&T Intellectual Property I, L.P. Method and apparatus for broadcast communication via guided waves
US10243270B2 (en) 2016-12-07 2019-03-26 At&T Intellectual Property I, L.P. Beam adaptive multi-feed dielectric antenna system and methods for use therewith
US10547348B2 (en) 2016-12-07 2020-01-28 At&T Intellectual Property I, L.P. Method and apparatus for switching transmission mediums in a communication system
US10446936B2 (en) 2016-12-07 2019-10-15 At&T Intellectual Property I, L.P. Multi-feed dielectric antenna system and methods for use therewith
US10027397B2 (en) 2016-12-07 2018-07-17 At&T Intellectual Property I, L.P. Distributed antenna system and methods for use therewith
US10359749B2 (en) 2016-12-07 2019-07-23 At&T Intellectual Property I, L.P. Method and apparatus for utilities management via guided wave communication
US10139820B2 (en) 2016-12-07 2018-11-27 At&T Intellectual Property I, L.P. Method and apparatus for deploying equipment of a communication system
US10389029B2 (en) 2016-12-07 2019-08-20 At&T Intellectual Property I, L.P. Multi-feed dielectric antenna system with core selection and methods for use therewith
US10069535B2 (en) 2016-12-08 2018-09-04 At&T Intellectual Property I, L.P. Apparatus and methods for launching electromagnetic waves having a certain electric field structure
US10777873B2 (en) 2016-12-08 2020-09-15 At&T Intellectual Property I, L.P. Method and apparatus for mounting network devices
US10916969B2 (en) 2016-12-08 2021-02-09 At&T Intellectual Property I, L.P. Method and apparatus for providing power using an inductive coupling
US10411356B2 (en) 2016-12-08 2019-09-10 At&T Intellectual Property I, L.P. Apparatus and methods for selectively targeting communication devices with an antenna array
US10389037B2 (en) 2016-12-08 2019-08-20 At&T Intellectual Property I, L.P. Apparatus and methods for selecting sections of an antenna array and use therewith
US10264467B2 (en) 2016-12-08 2019-04-16 At&T Intellectual Property I, L.P. Method and apparatus for collecting data associated with wireless communications
US10938108B2 (en) 2016-12-08 2021-03-02 At&T Intellectual Property I, L.P. Frequency selective multi-feed dielectric antenna system and methods for use therewith
US10136255B2 (en) 2016-12-08 2018-11-20 At&T Intellectual Property I, L.P. Method and apparatus for proximity sensing on a communication device
US10340983B2 (en) 2016-12-09 2019-07-02 At&T Intellectual Property I, L.P. Method and apparatus for surveying remote sites via guided wave communications
US10264586B2 (en) 2016-12-09 2019-04-16 At&T Mobility Ii Llc Cloud-based packet controller and methods for use therewith
US10298293B2 (en) 2017-03-13 2019-05-21 At&T Intellectual Property I, L.P. Apparatus of communication utilizing wireless network devices
US10097241B1 (en) 2017-04-11 2018-10-09 At&T Intellectual Property I, L.P. Machine assisted development of deployment site inventory
CN107017912A (zh) * 2017-04-12 2017-08-04 电子科技大学 一种多标准全双工二次变频式收发机
CN107181477B (zh) * 2017-05-11 2020-07-03 清华大学深圳研究生院 一种新型的频率生成器
US10630341B2 (en) 2017-05-11 2020-04-21 At&T Intellectual Property I, L.P. Method and apparatus for installation and alignment of radio devices
US10103777B1 (en) 2017-07-05 2018-10-16 At&T Intellectual Property I, L.P. Method and apparatus for reducing radiation from an external surface of a waveguide structure
US10727583B2 (en) 2017-07-05 2020-07-28 At&T Intellectual Property I, L.P. Method and apparatus for steering radiation on an outer surface of a structure
US10389403B2 (en) 2017-07-05 2019-08-20 At&T Intellectual Property I, L.P. Method and apparatus for reducing flow of currents on an outer surface of a structure
US10244408B1 (en) 2017-10-19 2019-03-26 At&T Intellectual Property I, L.P. Dual mode communications device with null steering and methods for use therewith
US10374277B2 (en) 2017-09-05 2019-08-06 At&T Intellectual Property I, L.P. Multi-arm dielectric coupling system and methods for use therewith
US10374278B2 (en) 2017-09-05 2019-08-06 At&T Intellectual Property I, L.P. Dielectric coupling system with mode control and methods for use therewith
US10051488B1 (en) 2017-10-19 2018-08-14 At&T Intellectual Property I, L.P. Dual mode communications device with remote device feedback and methods for use therewith
US10446899B2 (en) 2017-09-05 2019-10-15 At&T Intellectual Property I, L.P. Flared dielectric coupling system and methods for use therewith
US10714831B2 (en) 2017-10-19 2020-07-14 At&T Intellectual Property I, L.P. Dual mode communications device with remote radio head and methods for use therewith
US10305197B2 (en) 2017-09-06 2019-05-28 At&T Intellectual Property I, L.P. Multimode antenna system and methods for use therewith
US10230426B1 (en) 2017-09-06 2019-03-12 At&T Intellectual Property I, L.P. Antenna structure with circularly polarized antenna beam
US10673116B2 (en) 2017-09-06 2020-06-02 At&T Intellectual Property I, L.P. Method and apparatus for coupling an electromagnetic wave to a transmission medium
US10498589B2 (en) 2017-10-04 2019-12-03 At&T Intellectual Property I, L.P. Apparatus and methods for mitigating a fault that adversely affects ultra-wideband transmissions
US10123217B1 (en) 2017-10-04 2018-11-06 At&T Intellectual Property I, L.P. Apparatus and methods for communicating with ultra-wideband electromagnetic waves
US10764762B2 (en) 2017-10-04 2020-09-01 At&T Intellectual Property I, L.P. Apparatus and methods for distributing a communication signal obtained from ultra-wideband electromagnetic waves
US9998172B1 (en) 2017-10-04 2018-06-12 At&T Intellectual Property I, L.P. Apparatus and methods for processing ultra-wideband electromagnetic waves
US10763916B2 (en) 2017-10-19 2020-09-01 At&T Intellectual Property I, L.P. Dual mode antenna systems and methods for use therewith
US10553960B2 (en) 2017-10-26 2020-02-04 At&T Intellectual Property I, L.P. Antenna system with planar antenna and methods for use therewith
US10553959B2 (en) 2017-10-26 2020-02-04 At&T Intellectual Property I, L.P. Antenna system with planar antenna and directors and methods for use therewith
US10554235B2 (en) 2017-11-06 2020-02-04 At&T Intellectual Property I, L.P. Multi-input multi-output guided wave system and methods for use therewith
US10555318B2 (en) 2017-11-09 2020-02-04 At&T Intellectual Property I, L.P. Guided wave communication system with resource allocation and methods for use therewith
US10355745B2 (en) 2017-11-09 2019-07-16 At&T Intellectual Property I, L.P. Guided wave communication system with interference mitigation and methods for use therewith
US10555249B2 (en) 2017-11-15 2020-02-04 At&T Intellectual Property I, L.P. Access point and methods for communicating resource blocks with guided electromagnetic waves
US10284261B1 (en) 2017-11-15 2019-05-07 At&T Intellectual Property I, L.P. Access point and methods for communicating with guided electromagnetic waves
US10389419B2 (en) 2017-12-01 2019-08-20 At&T Intellectual Property I, L.P. Methods and apparatus for generating and receiving electromagnetic waves
US10820329B2 (en) 2017-12-04 2020-10-27 At&T Intellectual Property I, L.P. Guided wave communication system with interference mitigation and methods for use therewith
US10424845B2 (en) 2017-12-06 2019-09-24 At&T Intellectual Property I, L.P. Method and apparatus for communication using variable permittivity polyrod antenna
US11018525B2 (en) 2017-12-07 2021-05-25 At&T Intellectual Property 1, L.P. Methods and apparatus for increasing a transfer of energy in an inductive power supply
US10680308B2 (en) 2017-12-07 2020-06-09 At&T Intellectual Property I, L.P. Methods and apparatus for bidirectional exchange of electromagnetic waves
US10326495B1 (en) 2018-03-26 2019-06-18 At&T Intellectual Property I, L.P. Coaxial surface wave communication system and methods for use therewith
US10714824B2 (en) 2018-03-26 2020-07-14 At&T Intellectual Property I, L.P. Planar surface wave launcher and methods for use therewith
US10686493B2 (en) 2018-03-26 2020-06-16 At&T Intellectual Property I, L.P. Switching of data channels provided in electromagnetic waves and methods thereof
US10340979B1 (en) 2018-03-26 2019-07-02 At&T Intellectual Property I, L.P. Surface wave communication system and methods for use therewith
US10727577B2 (en) 2018-03-29 2020-07-28 At&T Intellectual Property I, L.P. Exchange of wireless signals guided by a transmission medium and methods thereof
US10581275B2 (en) 2018-03-30 2020-03-03 At&T Intellectual Property I, L.P. Methods and apparatus for regulating a magnetic flux in an inductive power supply
US10547545B2 (en) 2018-03-30 2020-01-28 At&T Intellectual Property I, L.P. Method and apparatus for switching of data channels provided in electromagnetic waves
US10419074B1 (en) 2018-05-16 2019-09-17 At&T Intellectual Property I, L.P. Method and apparatus for communications using electromagnetic waves and an insulator
US10804962B2 (en) 2018-07-09 2020-10-13 At&T Intellectual Property I, L.P. Method and apparatus for communications using electromagnetic waves
US10305192B1 (en) 2018-08-13 2019-05-28 At&T Intellectual Property I, L.P. System and method for launching guided electromagnetic waves with impedance matching
US10778286B2 (en) 2018-09-12 2020-09-15 At&T Intellectual Property I, L.P. Methods and apparatus for transmitting or receiving electromagnetic waves
US10405199B1 (en) 2018-09-12 2019-09-03 At&T Intellectual Property I, L.P. Apparatus and methods for transmitting or receiving electromagnetic waves
US10833727B2 (en) 2018-10-02 2020-11-10 At&T Intellectual Property I, L.P. Methods and apparatus for launching or receiving electromagnetic waves
US10587310B1 (en) 2018-10-10 2020-03-10 At&T Intellectual Property I, L.P. Methods and apparatus for selectively controlling energy consumption of a waveguide system
US10693667B2 (en) 2018-10-12 2020-06-23 At&T Intellectual Property I, L.P. Methods and apparatus for exchanging communication signals via a cable of twisted pair wires
US10516197B1 (en) 2018-10-18 2019-12-24 At&T Intellectual Property I, L.P. System and method for launching scattering electromagnetic waves
US10931012B2 (en) 2018-11-14 2021-02-23 At&T Intellectual Property I, L.P. Device with programmable reflector for transmitting or receiving electromagnetic waves
US10957977B2 (en) 2018-11-14 2021-03-23 At&T Intellectual Property I, L.P. Device with virtual reflector for transmitting or receiving electromagnetic waves
US10938104B2 (en) 2018-11-16 2021-03-02 At&T Intellectual Property I, L.P. Method and apparatus for mitigating a change in an orientation of an antenna
US10686649B2 (en) 2018-11-16 2020-06-16 At&T Intellectual Property I, L.P. Method and apparatus for managing a local area network
US10727955B2 (en) 2018-11-29 2020-07-28 At&T Intellectual Property I, L.P. Method and apparatus for power delivery to waveguide systems
US10812139B2 (en) 2018-11-29 2020-10-20 At&T Intellectual Property I, L.P. Method and apparatus for communication utilizing electromagnetic waves and a telecommunication line
US10623033B1 (en) 2018-11-29 2020-04-14 At&T Intellectual Property I, L.P. Methods and apparatus to reduce distortion between electromagnetic wave transmissions
US10371889B1 (en) 2018-11-29 2019-08-06 At&T Intellectual Property I, L.P. Method and apparatus for providing power to waveguide systems
US10965344B2 (en) 2018-11-29 2021-03-30 At&T Intellectual Property 1, L.P. Methods and apparatus for exchanging wireless signals utilizing electromagnetic waves having differing characteristics
US11082091B2 (en) 2018-11-29 2021-08-03 At&T Intellectual Property I, L.P. Method and apparatus for communication utilizing electromagnetic waves and a power line
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US10978773B2 (en) 2018-12-03 2021-04-13 At&T Intellectual Property I, L.P. Guided wave dielectric coupler having a dielectric cable with an exposed dielectric core position for enabling electromagnetic coupling between the cable and a transmission medium
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US11205857B2 (en) 2018-12-04 2021-12-21 At&T Intellectual Property I, L.P. System and method for launching guided electromagnetic waves with channel feedback
US10977932B2 (en) 2018-12-04 2021-04-13 At&T Intellectual Property I, L.P. Method and apparatus for electromagnetic wave communications associated with vehicular traffic
US10581522B1 (en) 2018-12-06 2020-03-03 At&T Intellectual Property I, L.P. Free-space, twisted light optical communication system
US10637535B1 (en) 2018-12-10 2020-04-28 At&T Intellectual Property I, L.P. Methods and apparatus to receive electromagnetic wave transmissions
US10666323B1 (en) 2018-12-13 2020-05-26 At&T Intellectual Property I, L.P. Methods and apparatus for monitoring conditions to switch between modes of transmission
US10812142B2 (en) 2018-12-13 2020-10-20 At&T Intellectual Property I, L.P. Method and apparatus for mitigating thermal stress in a waveguide communication system
US10469156B1 (en) 2018-12-13 2019-11-05 At&T Intellectual Property I, L.P. Methods and apparatus for measuring a signal to switch between modes of transmission
US10951265B1 (en) 2019-12-02 2021-03-16 At&T Intellectual Property I, L.P. Surface wave repeater with cancellation and methods for use therewith
US11283177B2 (en) 2019-12-02 2022-03-22 At&T Intellectual Property I, L.P. Surface wave transmission device with RF housing and methods for use therewith
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US11356208B2 (en) 2019-12-04 2022-06-07 At&T Intellectual Property I, L.P. Transmission device with hybrid ARQ and methods for use therewith
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US11223098B2 (en) 2019-12-04 2022-01-11 At&T Intellectual Property I, L.P. Waveguide system comprising a scattering device for generating a second non-fundamental wave mode from a first non-fundamental wave mode
US10951267B1 (en) 2019-12-04 2021-03-16 At&T Intellectual Property I, L.P. Method and apparatus for adapting a waveguide to properties of a physical transmission medium
US10992343B1 (en) 2019-12-04 2021-04-27 At&T Intellectual Property I, L.P. Guided electromagnetic wave communications via an underground cable
US11063334B2 (en) 2019-12-05 2021-07-13 At&T Intellectual Property I, L.P. Method and apparatus having one or more adjustable structures for launching or receiving electromagnetic waves having a desired wavemode
US10812123B1 (en) 2019-12-05 2020-10-20 At&T Intellectual Property I, L.P. Magnetic coupler for launching and receiving electromagnetic waves and methods thereof
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US11356143B2 (en) 2019-12-10 2022-06-07 At&T Intellectual Property I, L.P. Waveguide system with power stabilization and methods for use therewith
US11201753B1 (en) 2020-06-12 2021-12-14 At&T Intellectual Property I, L.P. Method and apparatus for managing power being provided to a waveguide system
US11171764B1 (en) 2020-08-21 2021-11-09 At&T Intellectual Property I, L.P. Method and apparatus for automatically retransmitting corrupted data
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US11671926B2 (en) 2021-03-17 2023-06-06 At&T Intellectual Property I, L.P. Methods and apparatuses for facilitating signaling and power in a communication system
US11569868B2 (en) 2021-03-17 2023-01-31 At&T Intellectual Property I, L.P. Apparatuses and methods for enhancing a reliability of power available to communicaton devices via an insulator
US11533079B2 (en) 2021-03-17 2022-12-20 At&T Intellectual Property I, L.P. Methods and apparatuses for facilitating guided wave communications with an enhanced flexibility in parameters
US11664883B2 (en) 2021-04-06 2023-05-30 At&T Intellectual Property I, L.P. Time domain duplexing repeater using envelope detection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5179360A (en) * 1991-03-20 1993-01-12 Sony Corporation Transmitting/receiving apparatus switchable between digital and analog modulation modes
EP0529767A1 (en) * 1991-05-31 1993-03-03 Nec Corporation Digital radio communication apparatus
EP0535800A2 (en) * 1991-09-04 1993-04-07 Nokia Mobile Phones Ltd. General-purpose synthesizer for a radio apparatus

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675131A (en) * 1971-01-15 1972-07-04 Ibm Coherent single sideband phase locking technique
US4092594A (en) * 1975-05-30 1978-05-30 Masco Corporation Of Indiana Crystalless scanning radio receiver controlled by processing means
JPS54139316A (en) * 1978-04-20 1979-10-29 Matsushita Electric Ind Co Ltd Am ssb transmitter/receiver
US4393626A (en) * 1981-11-09 1983-07-19 Cincinnati Milacron Inc. Toolholder for supporting thin rotary tools
US4476575A (en) * 1982-12-13 1984-10-09 General Electric Company Radio transceiver
GB2148669A (en) * 1983-10-21 1985-05-30 Philips Electronic Associated Data receiver
US5023930A (en) * 1987-08-03 1991-06-11 Orion Industries, Inc. Booster with detectable boost operation
EP0305603B1 (en) * 1987-09-03 1993-03-10 Koninklijke Philips Electronics N.V. Gain and phase correction in a dual branch receiver
JPH0642638B2 (ja) * 1989-02-09 1994-06-01 株式会社東芝 無線通信装置
IT1230401B (it) * 1989-06-15 1991-10-21 Italtel Spa Ricevitore a conversione diretta per segnali numerici e metodo per la demodulazione di tali segnali.
JPH0366233A (ja) * 1989-08-05 1991-03-20 Matsushita Electric Ind Co Ltd 送受信装置
US5095533A (en) * 1990-03-23 1992-03-10 Rockwell International Corporation Automatic gain control system for a direct conversion receiver
US5230088A (en) * 1991-10-24 1993-07-20 Symbol Technologies, Inc. Radio transceiver and related method of frequency control
JP3358183B2 (ja) * 1993-04-09 2002-12-16 ソニー株式会社 時分割多重送受信装置
US5392460A (en) * 1993-04-23 1995-02-21 Nokia Mobile Phones Ltd. Dual mode radiotelephone terminal selectively operable for frequency modulated or phase modulated operation
JP2797916B2 (ja) * 1993-08-05 1998-09-17 日本電気株式会社 搬送波再生回路
JP3252653B2 (ja) * 1995-06-05 2002-02-04 三菱電機株式会社 送受信機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5179360A (en) * 1991-03-20 1993-01-12 Sony Corporation Transmitting/receiving apparatus switchable between digital and analog modulation modes
EP0529767A1 (en) * 1991-05-31 1993-03-03 Nec Corporation Digital radio communication apparatus
EP0535800A2 (en) * 1991-09-04 1993-04-07 Nokia Mobile Phones Ltd. General-purpose synthesizer for a radio apparatus

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