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1. 发明申请

WO2003065585A1 TRANSCEIVER USING A HARMONIC REJECTION MIXER 审中-公开
标题翻译：收发器使用谐波抑制混频器
公开(公告)号：WO2003065585A1
公开(公告)日：2003-08-07
申请号：PCT/US2003/002476
申请日：2003-01-27
申请人： QUALCOMM INCORPORATED
发明人： SEE, Andrew , JAFFEE, James , MOLLENKOPF, Steven , SZABO, Sandor
IPC分类号： H03L7/185
CPC分类号： H03C3/0966 , H03C3/40 , H03D7/18 , H03D2200/0086 , H03L7/18 , H04B1/403
摘要： A wireless transceiver includes a transmitter having a harmonic rejection mixer and an RF output phase-locked loop in a two step up-conversion architecture, and a direct conversion receiver. The transmitter includes a local oscillator for producing a signal at a multiple of an intermediate frequency, a quadrature modulator harmonic rejection mixer responsive to the signal at the multiple of the intermediate frequency for modulating in-phase and quadrature-phase base-band signals to produce an intermediate frequency signal, a switchable signal responsive to the intermediate frequency signal for producing a filtered intermediate frequency signal, and an RF output offset phase-locked loop responsive to the filtered intermediate frequency signal and the signal at the multiple of the intermediate frequency for producing an RF transmission signal. The harmonic rejection mixer reduces filtering requirements to facilitate a high level of circuit integration while the output offset phase-locked loop reduces the power consumption. TheThe switchability of the filter allows the utilisation of the transceiver for EGSM, DCS and PCS communication. The local oscillator may use a integer or fractional-N phase-locked loop.
摘要翻译：无线收发器包括具有谐波抑制混频器的发射器和两级升压转换架构中的RF输出锁相环以及直接转换接收器。发射机包括用于产生中频倍数的信号的本地振荡器，响应于中频倍数处的信号的正交调制器谐波抑制混频器，用于调制同相和正交相位基带信号以产生中频信号，响应于用于产生滤波的中频信号的中频信号的可切换信号，以及响应于滤波后的中频信号的RF输出偏移锁相环，以及产生中频频率的倍数的信号 RF传输信号。谐波抑制混频器降低了滤波要求，从而促进了高电平集成，同时输出偏移锁相环降低了功耗。滤波器的可切换性允许收发器利用EGSM，DCS和PCS通信。本地振荡器可以使用整数或分数N锁相环。

2. 发明申请

WO2003067841A2 MULTI-STANDARD TRANSMITTER SYSTEM AND METHOD FOR A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：用于无线通信系统的多标准发射机系统和方法
公开(公告)号：WO2003067841A2
公开(公告)日：2003-08-14
申请号：PCT/US2003/003557
申请日：2003-02-04
申请人： QUALCOMM, INCORPORATED
发明人： MOLLENKOPF, Steven M. , SEE, Andrew , WALKER, Brett C.
IPC分类号： H04L27/20
CPC分类号： H04L27/2017 , H04B1/0475 , H04L27/2092
摘要： A transmitter (108) converts a digital baseband signal input (150) for transmission by an antenna (114) to support multiple communication standards. An over-deviation phase multiplier (130) increases signal phase deviation by a factor of M. A digital phase modulator (176) applies trigonometric lookup tables. A digital intermediate frequency up-converter (132) up-shifts frequencies of desired signal content. First and second digital-to-analog converters (DACs) (134) and (136) use relatively low-bit operations, which add DAC noise (212). First and second low pass filters (138) and (140) apply rejection above frequencies of desired signal content. An analog I/Q modulator (142) converts from complex to real signals, adding an unwanted signal spaced from the desired signal content by an intermediate frequency multiple. A limiter (144) reduces amplitude modulated noise. An over-deviation phase divider (146) divides signal phase deviation by 1/M to reduce phase modulated noise.
摘要翻译：发射机（108）转换由天线（114）发射的数字基带信号输入（150）以支持多种通信标准。超偏差相位乘法器（130）将信号相位偏差增加M倍。数字相位调制器（176）应用三角查找表。数字中频上变频器（132）使期望的信号内容的频率上移。第一和第二数模转换器（DAC）（134）和（136）使用相对低位的操作，这些操作增加了DAC噪声（212）。第一和第二低通滤波器（138）和（140）在所需信号含量的频率之上施加抑制。模拟I / Q调制器（142）从复信号转换为真信号，通过中频倍数添加与期望信号内容隔开的不想要的信号。限制器（144）减小调幅噪声。超偏差分相器（146）将信号相位偏差除以1 / M以减少相位调制噪声。

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