CN1322398A - 利用极化调制产生线性已调信号的方法及装置 - Google Patents

利用极化调制产生线性已调信号的方法及装置 Download PDF

Info

Publication number
CN1322398A
CN1322398A CN99811811.7A CN99811811A CN1322398A CN 1322398 A CN1322398 A CN 1322398A CN 99811811 A CN99811811 A CN 99811811A CN 1322398 A CN1322398 A CN 1322398A
Authority
CN
China
Prior art keywords
phase
component
signal
amplitude component
modulated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN99811811.7A
Other languages
English (en)
Other versions
CN1130817C (zh
Inventor
B·林多夫
H·艾立森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clastres LLC
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of CN1322398A publication Critical patent/CN1322398A/zh
Application granted granted Critical
Publication of CN1130817C publication Critical patent/CN1130817C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C5/00Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal

Abstract

一种在极化调制系统中产生线性已调信号的装置和方法。发射信号被分成相位分量和振幅分量,在相位调制器中用相位分量调制载波信号,产生相位失真。补偿器通过修正振幅分量来补偿相位调制器产生的相位失真。由已补偿的振幅分量对相位已调载波信号进行振幅调制,以便产生线性已调信号。

Description

利用极化调制产生线性已调信号的方法及装置
本发明涉及一利用极化调制技术的通信系统,特别是涉及一种在蜂窝通信系统中的远程站利用极化调制产生线性已调信号的方法和装置。
现代通信系统,例如蜂窝和卫星无线电系统,其都采用不同的运行方式(模拟、数字、双重方式等)和储如为频分多址技术(FDMA)、时分多址技术(TDMA)、码分多址技术(CDMA)和这些技术混用的存取技术。
图1是典型的蜂窝移动无线电话系统的方框图,该系统包括典型基站110和移动站120。基站包括控制和处理单元130,该控制和处理单元130与移动交换中心(MSC)140相连,移动交换中心140依次与公共电话交换网络(PSTN)(未示出)相连。现有技术中这种蜂窝无线电话系统的一般特点是已知的。基站110通过话频信道收发机150处理多个话频信道,电话频信道收发机150由控制和处理单元130所控制。此外,每个基站包括控制信道收发设备160,其也能处理多个控制信道。控制信道收发机160由控制和处理单元130所控制。控制信道收发机160通过基站或单元的控制信道向那些控制信道被锁定的移动装置广播控制信息。可以理解的是,能将收发机150和160作为象话频和控制收发机170那样的信号装置,以便与共用同一无线电载波的控制和通信信道一起使用。
在例如作为移动站120的典型收发机中,基带通信信号是载波信号上调制的相位、频率或振幅,调制信号由收发机发射。
现有多种调制技术。正交幅度调制技术(QAM)和相移键控技术(PSK)是线性调制技术的示例。这些技术通常采用如图1B所示的正交(I-Q)幅度调制器。基于要发射的信息100,数字信号处理器101产生数字化的同相(I)和正交(Q)分量。然后利用D/A转换器102a和b将这些数字化的I和Q分量转换成模拟信号。模拟信号在低通滤波器103a和b内进行低通滤波。滤波器103a和b的输出利用倍增器104a和b分别调制以90°相位分离的载波信号105a和b。倍增器104a和b的输出在加法器106内求和,以形成要在功率放大器内要被放大的信号107并将发射信号107。
通常认为更有效的另一项调制技术是极化调制技术。如美国专利5430416中示例所公开,并如图2所示,该技术是基于基带信号的极性表示法。根据该技术,利用极性分量(即振幅(r)和相位(Ψ)分量)代替I和Q成分量。根据要发射的信息200,数字信号处理器201产生振幅分量202和相位分量203。相位分量203在相位调制器205中调制载波信号,获得具有恒定包迹的相位调制。振幅分量202在D/A转换器204内被转换成模拟信号,然后馈通调整器206,调整器206调整信号的电流或电压,并根据模拟信号和输出信号208将功率放大器207的功率控制到目标功率值。经调整的模似信号在功率放大器207中通过控制功率放大器的功率调制相位已调载波信号。然后输出用于发射的所得放大信号208。
为了利用振幅分量调制相位已调信号,有必要使振幅分量的相位与载波信号所经受的相位改变相一致。传统极化调制装置中,在例如为功率放大器的部件内产生相位失真,这导致在振幅分量和相位已调载波信号之间不能重合。由此,最后得到的振幅和相位已调载波信号与所希望的已调载波信号不一致。
为解决该问题已经作了各种尝试,包括美国专利4972440中公开的技术。根据该专利,通过向载波信号提供相应相位失真来补偿功率放大器中引入的相位失真。
除功率放大器产生的相位失真之外,还存在由相位调制器产生的相位失真,该相位调制器包括实质作为低通滤波器的部件。通常假定相位调制器为理想状态,即假定相位调制器不会产生相位失真。然而,在实际应用过程中,相位调制器不是理想状态,它会产生引起振幅分量和相位已调载波信号之间不重合的相位失真。这将导致失真的输出信号,该信号的频谱比所希望的输出信号频谱要宽得多。由于该失真输出信号的宽频谱,从而无法满足发射信号所需的频谱。用于补偿功率放大器产生的相位失真的已有技术不能解决相位调制器产生的相位失真的问题。
因此,就需要一种方法和装置,用以补偿极化调制系统中由相位调制产生的相位失真。
因此本发明的一个目的是补偿极化调制系统中相位调制器产生的相位失真,以产生线性已调信号。本发明的另一个目的是,在利用极化调制效能的同时满足发射信号所需的频谱。
根据示范实施例,通过一种装置和方法能达到这些和其它目的,这种装置和方法能在极化调制系统中产生线性已调信号,即QAM或PSK信号。用于发射的信号被分成相位分量和振幅分量,将载波信号用相位分量进行相位调制。相位调制器产生相位失真,该相位失真通过修改振幅分量得到补偿。利用经补偿的振幅分量对相位已调信号进行振幅调制,以产生线性已调信号。
通过阅读该说明书并结合附图将更清楚本发明的特征、目的和优点,在附图中相同附图标记适用于相同部件,其中:
图1A表示蜂窝通信系统;
图1B表示传统I-Q正交振幅调制器;
图2表示传统极化调制器;
图3表示根据本发明的利用极化调制产生线性已调信号的示范装置;以及
图4表示根据本发明利用极化调制产生线性已调信号的示范方法。
为了达到说明的目的,下列描述针对蜂窝无线电通信系统,但可以理解的是本发明不局限于此,它还可以应用于其它类型的通信系统中。
根据本发明的示范实施例,由极化调制系统中相位调制器产生的相位失真得到补偿,以便得到线性已调信号,即QAM或PSK信号。图3示出了根据本发明的示范极化调制系统。
如图3所示,要发射的信息300(即二进制信息)首先在数字波形滤波器301内被转换成数字波形,然后在数字信号处理器302内被分成相位和振幅分量。相位分量馈入调制载波信号的相位调制器305,得到恒定包迹的相位调制。相位调制器可以是任意一种通用相位调制器,例如I-Q相位调制器或∑Δfractional-N PLL调制器。这种调制器的例子公开在共同未决的美国专利申请08/931430和08/931302(申请号)中,以及公开在T.Riley et al.“A SimplifiedContinuous Phase Modulator Technique”,IEEE Transactions on Circuits andSystems-II,Vol.41,pp.321-326(1994)和T Riley et al.“Delta-sigma Modulation inFractional-n frequency Synthesis”,IEEE Transactions on SolidState Circuits,Vol.28,pp.553-559(1993)中,在此将其结合进来作为参考文献。相位调制器305产生相位已调载波信号中的相位失真。
为校正该相位失真并提供线性已调信号,将振幅分量馈送到补偿器303,该补偿器303修改振幅分量以便补偿由相位调制器305产生的相位失真。例如,补偿器303基于相位调制器305中经受的延迟以及理想相位分量和失真相位分量(即包括由相位调制器产生的相位失真的相位分量)得出补偿函数。补偿器303将该补偿函数施于振幅分量。补偿器303能以任何执行这些函数的方式执行。例如,补偿器303包括一个查阅表和非线性数字滤波器,查阅表用于确定如何修改振幅分量(即确定补偿函数),而非线性数字滤波器用于将补偿函数施于振幅分量。可以选择的是,微型计算机可执行其部分或全部函数。
经补偿的数字振幅分量在D/A转换器304中被转换成模拟信号。所得模拟信号馈通调整器307,调整器307调整信号的电流或电压,并依据模拟信号和输出信号308将功率放大器306的功率控制到目标值。最后,经调整的模拟信号在功率放大器306中通过控制功率放大器的功率来调制相位己调载波信号,并输出经放大的信号308。
为便于理解补偿器303如何工作,假设所希望的线性已调基带信号sb(t)可表示为:
      sb(t)=I(t)+jQ(t)                   (1)
其中I(t)为所希望的线性己调基带信号的同相成分量,而Q(t)为其正交分量。由下式给出基带信号的极性表达式:(2)
然后,所希望的发射信号s(t)可表示为:
  s(t)=r(t)cos(ω0t+t)
      =r(t))costcosω0t-r(t)sintsinω0t.            (3)其中Ψt为要发射信号的相位分量,r(t)为要发射信号的振幅分量,ω0为载波频率。
然后,由相位调制器305输出的信号为:
Figure A9981181100072
(4)
其中τ为由相位调制器305中相位分量经受的延迟,而Ψt-τ为失真的相位分量。
依据理想相位分量和从相位调制器305输出的信号,补偿器303导出补偿函数c(t),该函数由下式给出:(6)
其中q为延迟算子(即qx(t)=x(t-τ),选择函数A(t)以使|c(t)|<∞,t,即,使补偿c(t)函数的绝对值对于所有的t都小于无穷。可以看出,如果ω0=0,即对于基带信号,等式4为最佳补偿函数。
假设H调整器(f)=1f,即假设对于所有频率调制器的转换函数H调整器(f)为1,则发射信号可写为:
Figure A9981181100082
(7)
现在,假定失真相位分量Ψt由下式给出:
Figure A9981181100083
(6)
其中εt表示相位误差,即失真相位分量与理想相位分量之间的相位失真。假设εt与Ψt相比很小,然后通过利用三角恒等式和泰勒展开式,存在下面的关系式:
Figure A9981181100084
(7)
其中O(εt)为噪声分量。由此,可将补偿发射信号st(t)写为:
st(t)=r(t)A(t)costcosω0t-r(t)A(t)sintsinω0t+O(εt)sinω0t.
 =s(t)+O(εt)sinω0t                                  (8)
从等式8中可以看出,通过利用等式4的补偿函数,发射信号包括所希望的信号加上很小的限带噪声分量。该噪声分量很小,可被忽略。因此,补偿信号st(t)具有能满足发射信号所需的频谱的频谱。
图4表示根据本发明的示范方法,该方法能利用极化调制系统产生线性已调信号。该方法开始于步骤400,在该步骤中,要发射的信息被滤波以产生数字波形。接着,在步骤410,经滤波的信号被分成振幅和相位分量。在步骤420,相位分量调制载波信号。在步骤430,例如,通过非线性滤波器将补偿函数施于振幅分量来修正振幅分量,以补偿相位调制产生的相位失真。在步骤440中,将经补偿的振幅分量转换成模拟信号,在步骤450中,依据模拟信号和输出信号调整功率放大器的功率电平。在步骤460中,对相位已调载波信号进行振幅调制,以便产生线性已调信号。然后,输出要发射的线性已调信号。
根据一个示范实施例,一种装置和方法通过补偿相位调制中的相位失真、利用极化调制产生线性已调信号。这就提供了一种有效线性调制器的数字仪器。
本领域普通技术人员应意识到,本发明能以其它的特殊形式得以体现,而不会脱离其必要特征。因此应认为上述实施例都涉及说明性而不是限制性的。

Claims (12)

1.一种在极化调制系统中产生线性已调信号的装置,该装置包括:
信号处理器,用以将发射信号分成相位分量和振幅分量;
相位调制器,用以用相位分量调制载波信号,其中相位调制器产生相位失真;以及
补偿器,用以补偿由相位调制器产生的相位失真;以及
振幅调制器,用以用振幅分量调制相位已调载波信号,以便产生线性已调信号。
2.根据权利要求1所述的装置,其中补偿器修正振幅分量,以便补偿相位失真。
3.根据权利要求2所述的装置,其中补偿器依据相位调制器产生的相位失真通过将补偿函数施于振幅分量来修正振幅分量。
4.根据权利要求1所述的装置,其中补偿器用等于相位调制器中经受的延迟的时间量来延迟振幅分量。
5.根据权利要求1所述的装置,其中补偿器包括补偿相位失真的非线性滤波器。
6.根据权利要求1所述的装置,其中所述装置包括在蜂窝收发机中。
7.一种在极化调制系统中产生线性已调信号的方法,该方法包括以下步骤:
将发射信号分成相位分量和振幅分量;
用相位分量对载波信号进行相位调制,其中相位调制产生相位失真;以及
补偿由相位调制器产生的相位失真;以及
用振幅分量对相位已调载波信号进行振幅调制,以便产生线性已调信号。
8.根据权利要求7所述的方法,其中补偿步骤包括修正振幅分量,以便补偿相位失真。
9.根据权利要求8所述的方法,其中补偿步骤依据相位调制产生的相位失真通过将补偿函数施于振幅分量来修正振幅分量。
10.根据权利要求7所述的方法,其中补偿步骤包括通过等于相位调制过程中经受的延迟的时间量来延迟振幅分量。
11.根据权利要求7所述的方法,其中补偿步骤包括对振幅分量进行非线性滤波。
12.根据权利要求7所述的方法,其中可在通信系统的收发机中执行这些步骤。
CN99811811.7A 1998-10-07 1999-10-06 利用极化调制产生线性已调信号的方法及装置 Expired - Fee Related CN1130817C (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/167658 1998-10-07
US09/167,658 US6101224A (en) 1998-10-07 1998-10-07 Method and apparatus for generating a linearly modulated signal using polar modulation
US09/167,658 1998-10-07

Publications (2)

Publication Number Publication Date
CN1322398A true CN1322398A (zh) 2001-11-14
CN1130817C CN1130817C (zh) 2003-12-10

Family

ID=22608259

Family Applications (1)

Application Number Title Priority Date Filing Date
CN99811811.7A Expired - Fee Related CN1130817C (zh) 1998-10-07 1999-10-06 利用极化调制产生线性已调信号的方法及装置

Country Status (9)

Country Link
US (1) US6101224A (zh)
EP (1) EP1119902B1 (zh)
JP (1) JP4414100B2 (zh)
CN (1) CN1130817C (zh)
AT (1) ATE247876T1 (zh)
AU (1) AU1304800A (zh)
DE (1) DE69910599T2 (zh)
MY (1) MY126431A (zh)
WO (1) WO2000021191A1 (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413210C (zh) * 2003-07-08 2008-08-20 松下电器产业株式会社 调制电路设备、调制方法和无线电通信设备
CN1930784B (zh) * 2004-03-10 2010-06-09 松下电器产业株式会社 发送装置及无线通信装置
CN101292420B (zh) * 2005-10-21 2011-04-27 Nxp股份有限公司 极化调制设备以及利用fm调制的方法
CN101379695B (zh) * 2006-02-06 2011-05-11 诺基亚公司 用于发射机包络延迟校准的方法和系统
CN101375493B (zh) * 2006-02-28 2011-10-12 松下电器产业株式会社 极化调制装置
CN103166635A (zh) * 2011-12-15 2013-06-19 英特尔移动通信有限责任公司 用以使用dpll来测量和补偿dco频率失真的方法和能力
CN103166906A (zh) * 2011-12-15 2013-06-19 英特尔移动通信有限责任公司 基于最小二乘估计法的极发射器中的非线性频率失真的适应补偿

Families Citing this family (94)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001514467A (ja) * 1997-08-25 2001-09-11 ノキア ネットワークス オサケ ユキチュア 角度及び/又は振幅変調のためのデジタル変調器
US6470055B1 (en) * 1998-08-10 2002-10-22 Kamilo Feher Spectrally efficient FQPSK, FGMSK, and FQAM for enhanced performance CDMA, TDMA, GSM, OFDN, and other systems
US8050345B1 (en) 1999-08-09 2011-11-01 Kamilo Feher QAM and GMSK systems
US7548787B2 (en) 2005-08-03 2009-06-16 Kamilo Feher Medical diagnostic and communication system
US6757334B1 (en) * 1998-08-10 2004-06-29 Kamilo Feher Bit rate agile third-generation wireless CDMA, GSM, TDMA and OFDM system
US7593481B2 (en) * 1998-08-31 2009-09-22 Kamilo Feher CDMA, W-CDMA, 3rd generation interoperable modem format selectable (MFS) systems with GMSK modulated systems
US7415066B2 (en) * 1998-08-10 2008-08-19 Kamilo Feher Mis-matched modulation-demodulation format selectable filters
US7079584B2 (en) 1998-08-10 2006-07-18 Kamilo Feher OFDM, CDMA, spread spectrum, TDMA, cross-correlated and filtered modulation
CA2341883A1 (en) 1998-08-31 2000-03-09 Kamilo Feher Feher keying (fk) modulation and transceivers including clock shaping processors
US6377784B2 (en) * 1999-02-09 2002-04-23 Tropian, Inc. High-efficiency modulation RF amplifier
US6864668B1 (en) 1999-02-09 2005-03-08 Tropian, Inc. High-efficiency amplifier output level and burst control
US6490440B1 (en) * 1999-06-01 2002-12-03 Motorola, Inc. Digital transmitter circuit and method of operation
US7260369B2 (en) 2005-08-03 2007-08-21 Kamilo Feher Location finder, tracker, communication and remote control system
US9813270B2 (en) 1999-08-09 2017-11-07 Kamilo Feher Heart rate sensor and medical diagnostics wireless devices
US9373251B2 (en) 1999-08-09 2016-06-21 Kamilo Feher Base station devices and automobile wireless communication systems
US9307407B1 (en) 1999-08-09 2016-04-05 Kamilo Feher DNA and fingerprint authentication of mobile devices
US6366177B1 (en) 2000-02-02 2002-04-02 Tropian Inc. High-efficiency power modulators
DE10056472A1 (de) * 2000-11-15 2002-05-29 Infineon Technologies Ag Polar-Loop-Sendeschaltung
US6754287B2 (en) * 2001-03-21 2004-06-22 Skyworks Solutions, Inc. Method and apparatus for producing a modulated signal
US7020070B2 (en) 2001-04-10 2006-03-28 Telefonaktiebolaget L M Ericsson (Publ) Selectively controlled modulation distortion of an IQ-baseband signal
US6701138B2 (en) * 2001-06-11 2004-03-02 Rf Micro Devices, Inc. Power amplifier control
US20070060074A1 (en) * 2002-03-07 2007-03-15 Matsushita Electric Industrial Co., Ltd. High-efficiency modulating RF amplifier
US6834084B2 (en) * 2002-05-06 2004-12-21 Rf Micro Devices Inc Direct digital polar modulator
US7991071B2 (en) * 2002-05-16 2011-08-02 Rf Micro Devices, Inc. AM to PM correction system for polar modulator
US7801244B2 (en) * 2002-05-16 2010-09-21 Rf Micro Devices, Inc. Am to AM correction system for polar modulator
US6892057B2 (en) * 2002-08-08 2005-05-10 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for reducing dynamic range of a power amplifier
US6924699B2 (en) * 2003-03-06 2005-08-02 M/A-Com, Inc. Apparatus, methods and articles of manufacture for digital modification in electromagnetic signal processing
US6891432B2 (en) * 2002-11-14 2005-05-10 Mia-Com, Inc. Apparatus, methods and articles of manufacture for electromagnetic processing
US7245183B2 (en) * 2002-11-14 2007-07-17 M/A-Com Eurotec Bv Apparatus, methods and articles of manufacture for processing an electromagnetic wave
US7298854B2 (en) * 2002-12-04 2007-11-20 M/A-Com, Inc. Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing
US7187231B2 (en) * 2002-12-02 2007-03-06 M/A-Com, Inc. Apparatus, methods and articles of manufacture for multiband signal processing
US7502422B2 (en) * 2003-06-04 2009-03-10 M/A—COM, Inc. Electromagnetic wave transmitter systems, methods and articles of manufacture
US7545865B2 (en) * 2002-12-03 2009-06-09 M/A-Com, Inc. Apparatus, methods and articles of manufacture for wideband signal processing
US7551685B2 (en) * 2003-08-25 2009-06-23 M/A-Com, Inc. Apparatus, methods and articles of manufacture for signal correction using adaptive phase re-alignment
US7203262B2 (en) 2003-05-13 2007-04-10 M/A-Com, Inc. Methods and apparatus for signal modification in a fractional-N phase locked loop system
US7526260B2 (en) * 2002-11-14 2009-04-28 M/A-Com Eurotec, B.V. Apparatus, methods and articles of manufacture for linear signal modification
US6701134B1 (en) * 2002-11-05 2004-03-02 Rf Micro Devices, Inc. Increased dynamic range for power amplifiers used with polar modulation
JP2004175052A (ja) * 2002-11-29 2004-06-24 Sony Corp インクジェット被記録媒体、インクジェット画像形成方法及び印画物
US6859098B2 (en) 2003-01-17 2005-02-22 M/A-Com, Inc. Apparatus, methods and articles of manufacture for control in an electromagnetic processor
US7447272B2 (en) * 2003-04-22 2008-11-04 Freescale Semiconductor, Inc. Filter method and apparatus for polar modulation
GB2402006B (en) * 2003-05-23 2005-08-10 Motorola Inc Analog to digital converter
US6987417B2 (en) * 2003-06-24 2006-01-17 Northrop Grumman Corpoation Polar and linear amplifier system
US7043213B2 (en) * 2003-06-24 2006-05-09 Northrop Grumman Corporation Multi-mode amplifier system
US7126999B2 (en) * 2003-08-11 2006-10-24 Telefonaktiebolaget Lm Ericsson (Publ) Pseudo-polar modulation for radio transmitters
WO2005027297A2 (en) * 2003-09-16 2005-03-24 Nokia Corporation Hybrid switched mode/linear power amplifier power supply for use in polar transmitter
US7480511B2 (en) * 2003-09-19 2009-01-20 Trimble Navigation Limited Method and system for delivering virtual reference station data
US7091778B2 (en) * 2003-09-19 2006-08-15 M/A-Com, Inc. Adaptive wideband digital amplifier for linearly modulated signal amplification and transmission
JP3935460B2 (ja) * 2003-09-30 2007-06-20 松下電器産業株式会社 振幅情報抽出装置および振幅情報抽出方法
JP4395044B2 (ja) * 2003-10-22 2010-01-06 パナソニック株式会社 変調装置及び変調方法
US7343138B2 (en) * 2003-12-08 2008-03-11 M/A-Com, Inc. Compensating for load pull in electromagentic signal propagation using adaptive impedance matching
US7912145B2 (en) * 2003-12-15 2011-03-22 Marvell World Trade Ltd. Filter for a modulator and methods thereof
JP3961498B2 (ja) * 2004-02-27 2007-08-22 松下電器産業株式会社 高周波回路装置
US7551686B1 (en) 2004-06-23 2009-06-23 Rf Micro Devices, Inc. Multiple polynomial digital predistortion
US8031028B2 (en) * 2004-07-07 2011-10-04 SiGe Semiconductor (Europe) Ltd. Polar signal processor to drive a segmented power amplifier and method therefore
US7109791B1 (en) * 2004-07-09 2006-09-19 Rf Micro Devices, Inc. Tailored collector voltage to minimize variation in AM to PM distortion in a power amplifier
US7529523B1 (en) 2004-08-23 2009-05-05 Rf Micro Devices, Inc. N-th order curve fit for power calibration in a mobile terminal
US7359680B2 (en) * 2004-09-14 2008-04-15 Telefonaktiebolaget Lm Ericsson (Publ) Delay calibration in polar modulation transmitters
US7983632B2 (en) * 2004-09-24 2011-07-19 Broadcom Corporation Feedback control loop for amplitude modulation in a polar transmitter with a translational loop
US7359449B2 (en) 2004-10-05 2008-04-15 Kamilo Feher Data communication for wired and wireless communication
DE102004059985B4 (de) * 2004-12-13 2017-11-16 Intel Deutschland Gmbh Funksender mit einstellbaren Verstäkereinheiten im Basisband- und im Hochfrequenzabschnitt des Sendepfads
US7725086B2 (en) 2004-12-13 2010-05-25 Infineon Technologies Ag Method and apparatus for controlling a transmitter
CN101167326B (zh) * 2005-04-27 2010-09-29 松下电器产业株式会社 极化调制传输电路和通信设备
US7336127B2 (en) * 2005-06-10 2008-02-26 Rf Micro Devices, Inc. Doherty amplifier configuration for a collector controlled power amplifier
US8224265B1 (en) 2005-06-13 2012-07-17 Rf Micro Devices, Inc. Method for optimizing AM/AM and AM/PM predistortion in a mobile terminal
US20070018718A1 (en) * 2005-06-20 2007-01-25 National Sun Yat-Sen University Microwave transmitter and the method for increasing envelope bandwidth
US7493097B2 (en) * 2005-07-07 2009-02-17 Skyworks Solutions, Inc. High dynamic range compact mixer output stage for a wireless receiver
US20070015472A1 (en) * 2005-07-15 2007-01-18 Simo Murtojarvi Multimode transmitter, module, communication device and chip set
US20070018701A1 (en) * 2005-07-20 2007-01-25 M/A-Com, Inc. Charge pump apparatus, system, and method
US10009956B1 (en) 2017-09-02 2018-06-26 Kamilo Feher OFDM, 3G and 4G cellular multimode systems and wireless mobile networks
US7280810B2 (en) * 2005-08-03 2007-10-09 Kamilo Feher Multimode communication system
US20070087770A1 (en) * 2005-10-14 2007-04-19 Hong Gan Methods and apparatuses for transmission power control in a wireless communication system
US7330071B1 (en) 2005-10-19 2008-02-12 Rf Micro Devices, Inc. High efficiency radio frequency power amplifier having an extended dynamic range
US7483680B2 (en) * 2005-12-20 2009-01-27 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for modulation path delay mismatch compensation in a polar modulation transmitter
US8884714B2 (en) * 2005-12-22 2014-11-11 Pine Valley Investments, Inc. Apparatus, system, and method for digital base modulation of power amplifier in polar transmitter
US7599448B2 (en) * 2006-02-03 2009-10-06 Pine Valley Investments, Inc. Multi-mode selectable modulation architecture calibration and power control apparatus, system, and method for radio frequency power amplifier
US7877060B1 (en) 2006-02-06 2011-01-25 Rf Micro Devices, Inc. Fast calibration of AM/PM pre-distortion
US20070216455A1 (en) * 2006-03-17 2007-09-20 M/A-Com, Inc. Partial cascode delay locked loop architecture
US7962108B1 (en) 2006-03-29 2011-06-14 Rf Micro Devices, Inc. Adaptive AM/PM compensation
US7596184B2 (en) * 2006-03-30 2009-09-29 Pine Valley Investments, Inc. Apparatus, system, and method for amplitude-phase synchronization in polar transmitter
US7471154B2 (en) 2006-08-08 2008-12-30 Skyworks Solutions, Inc. Bias circuit for maintaining high linearity at cutback power conditions
US7446612B2 (en) * 2006-09-08 2008-11-04 Skyworks Solutions, Inc. Amplifier feedback and bias configuration
US7830220B2 (en) * 2006-09-26 2010-11-09 Infineon Technologies Ag Modulator arrangement and method for signal modulation
US7689182B1 (en) 2006-10-12 2010-03-30 Rf Micro Devices, Inc. Temperature compensated bias for AM/PM improvement
US7696826B2 (en) * 2006-12-04 2010-04-13 Skyworks Solutions, Inc. Temperature compensation of collector-voltage control RF amplifiers
US8009765B2 (en) * 2007-03-13 2011-08-30 Pine Valley Investments, Inc. Digital polar transmitter
US8009762B1 (en) 2007-04-17 2011-08-30 Rf Micro Devices, Inc. Method for calibrating a phase distortion compensated polar modulated radio frequency transmitter
US7991366B2 (en) * 2008-05-20 2011-08-02 Panasonic Corporation Methods and apparatus for reconstructing amplitude modulation signals in polar modulation transmitters
US8229029B2 (en) 2009-01-14 2012-07-24 Harris Corporation Transmitter with reduced spectral regrowth and associated methods
US8489042B1 (en) 2009-10-08 2013-07-16 Rf Micro Devices, Inc. Polar feedback linearization
US8195102B2 (en) * 2010-06-02 2012-06-05 Nxp B.V. System and method for transmitting a baseband real signal with a non-constant envelope using a polar transmitter
US8325073B2 (en) * 2010-11-30 2012-12-04 Qualcomm Incorporated Performing enhanced sigma-delta modulation
US8867660B2 (en) 2011-12-15 2014-10-21 Intel Mobile Communications GmbH Method and system to measure and compensate undue DCO frequency peaks at GFSK ramp down
US9172570B1 (en) 2014-06-13 2015-10-27 Intel IP Corporation Compensation of oscillator frequency pulling
US9923529B2 (en) 2016-02-03 2018-03-20 Samsung Electronics Co., Ltd Customizable ramp-up and ramp-down amplitude profiles for a digital power amplifier (DPA) based transmitter

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB918583A (zh) * 1958-03-27 1900-01-01
US3906401A (en) * 1974-09-03 1975-09-16 Bell Telephone Labor Inc Feedforward error correction in interferometer modulators
US4324952A (en) * 1978-08-21 1982-04-13 Harris Corporation Direct function receivers and transmitters for multichannel communications system
US4268802A (en) * 1979-05-23 1981-05-19 Fisher Charles B Modulation distortion reducer
US4373115A (en) * 1980-08-18 1983-02-08 Kahn Leonard R Predictive distortion reduction in AM stereo transmitters
US4485358A (en) * 1981-09-28 1984-11-27 E-Systems, Inc. Method and apparatus for pulse angle modulation
US4509017A (en) * 1981-09-28 1985-04-02 E-Systems, Inc. Method and apparatus for pulse angle modulation
US4584541A (en) * 1984-12-28 1986-04-22 Rca Corporation Digital modulator with variations of phase and amplitude modulation
US4700151A (en) * 1985-03-20 1987-10-13 Nec Corporation Modulation system capable of improving a transmission system
IT1215370B (it) * 1987-02-26 1990-02-08 Gtg Ora Siemens Telecomunicazi Linearizzatore per amplificatore di potenza a microonde.
US4972440A (en) * 1988-09-23 1990-11-20 Hughes Aircraft Company Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals
US4968956A (en) * 1989-12-04 1990-11-06 Trw Inc. Microwave phase modulator having a quadrature path with phase offset
GB9002789D0 (en) * 1990-02-08 1990-04-04 Marconi Co Ltd Circuit for reducing distortion produced by an r.f.power amplifier
IT1251082B (it) * 1991-07-11 1995-05-04 Sits Soc It Telecom Siemens Procedimento per la compensazione della distorsione am/pm di un trasmettitore tramite modulazuone della fase dell'oscillazione tlocale, e relativo circuito di compemsazione.
JPH05152981A (ja) * 1991-11-26 1993-06-18 Iwatsu Electric Co Ltd 複合変調波の受信機
JP3166321B2 (ja) * 1992-07-01 2001-05-14 日本電気株式会社 変調信号送信システム
US5450044A (en) * 1993-04-14 1995-09-12 Acrodyne Industries, Inc. Quadrature amplitude modulator including a digital amplitude modulator as a component thereof
US5420536A (en) * 1993-03-16 1995-05-30 Victoria University Of Technology Linearized power amplifier
US5430416A (en) * 1994-02-23 1995-07-04 Motorola Power amplifier having nested amplitude modulation controller and phase modulation controller
US5506546A (en) * 1994-06-20 1996-04-09 Nec Corporation Method and apparatus for generating transmitting wave
JP2964883B2 (ja) * 1994-09-30 1999-10-18 日本電気株式会社 送信器
US5491454A (en) * 1994-10-31 1996-02-13 Motorola, Inc. Method and apparatus for reducing distortion in an output signal of an amplifier
JP3560398B2 (ja) * 1995-08-31 2004-09-02 富士通株式会社 歪補償を有する増幅器
US5705959A (en) * 1996-10-08 1998-01-06 The United States Of America As Represented By The Secretary Of The Air Force High efficiency low distortion amplification

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413210C (zh) * 2003-07-08 2008-08-20 松下电器产业株式会社 调制电路设备、调制方法和无线电通信设备
US7702299B2 (en) 2003-07-08 2010-04-20 Panasonic Corporation Modulation circuit device, modulation method and radio communication device
CN1930784B (zh) * 2004-03-10 2010-06-09 松下电器产业株式会社 发送装置及无线通信装置
CN101292420B (zh) * 2005-10-21 2011-04-27 Nxp股份有限公司 极化调制设备以及利用fm调制的方法
CN101379695B (zh) * 2006-02-06 2011-05-11 诺基亚公司 用于发射机包络延迟校准的方法和系统
CN101375493B (zh) * 2006-02-28 2011-10-12 松下电器产业株式会社 极化调制装置
CN103166635A (zh) * 2011-12-15 2013-06-19 英特尔移动通信有限责任公司 用以使用dpll来测量和补偿dco频率失真的方法和能力
CN103166906A (zh) * 2011-12-15 2013-06-19 英特尔移动通信有限责任公司 基于最小二乘估计法的极发射器中的非线性频率失真的适应补偿
CN103166906B (zh) * 2011-12-15 2016-03-23 英特尔移动通信有限责任公司 基于最小二乘估计法的极发射器中的非线性频率失真的适应补偿
CN103166635B (zh) * 2011-12-15 2016-08-03 英特尔移动通信有限责任公司 用以使用dpll来测量和补偿dco频率失真的方法和系统

Also Published As

Publication number Publication date
WO2000021191A1 (en) 2000-04-13
EP1119902B1 (en) 2003-08-20
AU1304800A (en) 2000-04-26
ATE247876T1 (de) 2003-09-15
JP2002527921A (ja) 2002-08-27
US6101224A (en) 2000-08-08
MY126431A (en) 2006-09-29
CN1130817C (zh) 2003-12-10
JP4414100B2 (ja) 2010-02-10
DE69910599D1 (de) 2003-09-25
EP1119902A1 (en) 2001-08-01
DE69910599T2 (de) 2004-06-24

Similar Documents

Publication Publication Date Title
CN1130817C (zh) 利用极化调制产生线性已调信号的方法及装置
CN1053719A (zh) 无线电发射机中末级放大器非线性的补偿方法
CN1132389C (zh) 功率正交调制系统和方法
US6647073B2 (en) Linearisation and modulation device
US6587513B1 (en) Predistorter
CN1111975C (zh) 用于无线发射机中的设备及方法
EP1304826B1 (en) Waveform generation for interplex modulation
US6011815A (en) Compensated ΔΣ controlled phase locked loop modulator
JP3169803B2 (ja) 電力増幅器の非線形補償回路
AU705593B2 (en) Converter for converting a modulating signal with variable envelope to two modulating signals without variable envelope, transmitter using the converter and method for transmitting a modulated wave with variable envelope
CN1326609A (zh) 用于进行具有独立的、高效率调幅的i/q调制的电路和方法
US20050226340A1 (en) Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacturre
US6415002B1 (en) Phase and amplitude modulation of baseband signals
CN1247037C (zh) 预失真型放大装置
US4870374A (en) Modulator producing phase modulation by combining amplitude modulated signals
US7221915B2 (en) Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
JP2500744B2 (ja) 負帰還増幅器
JP2002513248A (ja) 変調を行なう方法および装置
US5862457A (en) Multichannel predistortion linearizer
US5499389A (en) Method of compensating the dependence of the useful transmitter signal on the transfer function of a combiner filter
JP4387063B2 (ja) Cdma通信システムにおいてクロック・ジッタによって生じる位相誤差の補償
CA2460298C (en) Modulation using discrete amplitude adjustment and dual digital delay lines
JPH11196140A (ja) 電力増幅器
CN1322408A (zh) 在cdma移动无线系统的集簇信道中传输
KR960007663B1 (ko) 코드분할 다원접속 방식의 통신 시스템에 있어서 직접 디지탈 합성 방식을 이용한 다중 채널 이중 위상 스프트 키잉 변조회로

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: CLUSTER CO., LTD.

Free format text: FORMER OWNER: TELEFONAKTIEBOLAGET LM ERICSSON (SE) S-126 25 STOCKHOLM, SWEDEN

Effective date: 20150507

Owner name: OPTIS WIRELESS TECHNOLOGY LLC

Free format text: FORMER OWNER: CLUSTER CO., LTD.

Effective date: 20150507

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20150507

Address after: Texas, USA

Patentee after: Telefonaktiebolaget LM Ericsson (publ)

Address before: Delaware

Patentee before: Clastres LLC

Effective date of registration: 20150507

Address after: Delaware

Patentee after: Clastres LLC

Address before: Stockholm

Patentee before: Telefonaktiebolaget LM Ericsson

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20031210

Termination date: 20181006

CF01 Termination of patent right due to non-payment of annual fee