公开(公告)号：US07224750B2

公开(公告)日：2007-05-29

申请号：US10461264

申请日：2003-06-13

申请人： Jae-wan Kim ,  In-chul Hwang ,  Hae-moon Seo ,  Young-jin Kim

发明人： Jae-wan Kim ,  In-chul Hwang ,  Hae-moon Seo ,  Young-jin Kim

IPC分类号： H03K9/00

CPC分类号： H03D7/163

摘要： An apparatus and method for receiving RF signals in a RF communication system are provided. The apparatus for receiving RF signals comprises a pre-processing unit for bandpass-filtering a signal received through an external antenna with a predetermined bandwidth and extracting a RF input signal having a desired frequency; a mixing unit for mixing the RF input signal provided from the pre-processing unit with a local oscillation signal having the same frequency as the RF input signal and generating a desired baseband signal; a noise-free-signal amplifying unit for shifting the desired baseband signal to a band that is free of effects due to 1/f noise, amplifying the shifted baseband signal, and re-shifting the amplified signal to the baseband; and a baseband processing unit for selecting a desired channel signal from the amplified baseband signal to be provided from the noise-free-signal amplifying unit and amplifying the selected signal.

摘要翻译： 提供了一种用于在RF通信系统中接收RF信号的装置和方法。 用于接收RF信号的装置包括预处理单元，用于对具有预定带宽的外部天线接收的信号进行带通滤波，并提取具有期望频率的RF输入信号; 混合单元，用于将从预处理单元提供的RF输入信号与具有与RF输入信号相同频率的本地振荡信号混合并产生期望的基带信号; 无噪声信号放大单元，用于将期望的基带信号移位到由于1 / f噪声而无效的频带，放大经移位的基带信号，并将放大的信号重新移位到基带; 以及基带处理单元，用于从要由无噪声信号放大单元提供的放大基带信号中选择期望的信道信号，并放大所选择的信号。

公开(公告)号：US07711336B2

公开(公告)日：2010-05-04

申请号：US11688547

申请日：2007-03-20

申请人： Young-jin Kim ,  Hae-moon Seo

发明人： Young-jin Kim ,  Hae-moon Seo

IPC分类号： H04B1/68 ,  H03C3/00

CPC分类号： H03C1/60 ,  H03D7/161

摘要： Single sideband (SSB) mixers and methods of extracting a SSB signal, which are capable of outputting a single frequency using a plurality of mixers and a local oscillating frequency without having to implement phase-shifting. In one embodiment, a single sideband (SSB) mixer comprises a first mixer and a second mixer, wherein the first and second mixers multiply an input IF (intermediate frequency) signal by a local IF signal having the same frequency of the input IF signal; a band-pass filter which passes upper sideband signal output from the first mixer; a third mixer which multiplies the upper sideband signals output from the band-pass filter by a LO (local oscillating) signal; a fourth mixer which multiplies the signals output from the second mixer by the LO signal; and a subtraction device that subtracts output signals of the third mixer from output signals of the fourth mixer. Accordingly, a quadrature local oscillator which displaces a phase of a local oscillating signal by 90° at a high frequency is not required. Also, since the SSB mixer applies the same local oscillating frequency signal to each mixer, the rejection characteristics against undesired signals can be achieved to a level of about 70 dB, experimentally.

摘要翻译： 单边带（SSB）混合器和提取SSB信号的方法，其能够使用多个混频器和本地振荡频率输出单个频率，而不必实施相移。 在一个实施例中，单边带（SSB）混频器包括第一混频器和第二混频器，其中第一和第二混频器将输入IF（中频）信号乘以具有相同输入IF信号频率的本地IF信号; 带通滤波器，其通过从第一混频器输出的上边带信号; 第三混频器，其将从带通滤波器输出的上边带信号乘以LO（本地振荡）信号; 第四混频器，将从第二混频器输出的信号乘以LO信号; 以及从第四混频器的输出信号中减去第三混频器的输出信号的减法装置。 因此，不需要以高频将本地振荡信号的相位移位90°的正交本地振荡器。 此外，由于SSB混频器将相同的本地振荡频率信号施加到每个混频器，所以通过实验可以将针对不期望信号的抑制特性达到约70dB的水平。

公开(公告)号：US20070161363A1

公开(公告)日：2007-07-12

申请号：US11688547

申请日：2007-03-20

申请人： Young-jin Kim ,  Hae-moon Seo

发明人： Young-jin Kim ,  Hae-moon Seo

IPC分类号： H04B1/68 ,  H04B1/26

CPC分类号： H03C1/60 ,  H03D7/161

摘要： Single sideband (SSB) mixers and methods of extracting a SSB signal, which are capable of outputting a single frequency using a plurality of mixers and a local oscillating frequency without having to implement phase-shifting. In one embodiment, a single sideband (SSB) mixer comprises a first mixer and a second mixer, wherein the first and second mixers multiply an input IF (intermediate frequency) signal by a local IF signal having the same frequency of the input IF signal; a band-pass filter which passes upper sideband signal output from the first mixer; a third mixer which multiplies the upper sideband signals output from the band-pass filter by a LO (local oscillating) signal; a fourth mixer which multiplies the signals output from the second mixer by the LO signal; and a subtraction device that subtracts output signals of the third mixer from output signals of the fourth mixer. Accordingly, a quadrature local oscillator which displaces a phase of a local oscillating signal by 90° at a high frequency is not required. Also, since the SSB mixer applies the same local oscillating frequency signal to each mixer, the rejection characteristics against undesired signals can be achieved to a level of about 70 dB, experimentally.

摘要翻译： 单边带（SSB）混合器和提取SSB信号的方法，其能够使用多个混频器和本地振荡频率输出单个频率，而不必执行相移。 在一个实施例中，单边带（SSB）混频器包括第一混频器和第二混频器，其中第一和第二混频器将输入IF（中频）信号乘以具有相同输入IF信号频率的本地IF信号; 带通滤波器，其通过从第一混频器输出的上边带信号; 第三混频器，其将从带通滤波器输出的上边带信号乘以LO（本地振荡）信号; 第四混频器，将从第二混频器输出的信号乘以LO信号; 以及从第四混频器的输出信号中减去第三混频器的输出信号的减法装置。 因此，不需要以高频将本地振荡信号的相位移位90°的正交本地振荡器。 此外，由于SSB混频器将相同的本地振荡频率信号施加到每个混频器，所以通过实验可以将针对不期望信号的抑制特性达到约70dB的水平。

公开(公告)号：US07209721B2

公开(公告)日：2007-04-24

申请号：US10613439

申请日：2003-07-03

申请人： Young-jin Kim ,  Hae-moon Seo

发明人： Young-jin Kim ,  Hae-moon Seo

IPC分类号： H04B1/26

CPC分类号： H03C1/60 ,  H03D7/161

摘要： Single sideband (SSB) mixers and methods of extracting a SSB signal, which are capable of outputting a single frequency using a plurality of mixers and a local oscillating frequency without having to implement phase-shifting. In one embodiment, a single sideband (SSB) mixer comprises a first mixer and a second mixer, wherein the first and second mixers multiply an input IF (intermediate frequency) signal by a local IF signal having the same frequency of the input IF signal; a band-pass filter which passes upper sideband signal output from the first mixer; a third mixer which multiplies the upper sideband signals output from the band-pass filter by a LO (local oscillating) signal; a fourth mixer which multiplies the signals output from the second mixer by the LO signal; and a subtraction device that subtracts output signals of the third mixer from output signals of the fourth mixer. Accordingly, a quadrature local oscillator which displaces a phase of a local oscillating signal by 90° at a high frequency is not required. Also, since the SSB mixer applies the same local oscillating frequency signal to each mixer, the rejection characteristics against undesired signals can be achieved to a level of about 70 dB, experimentally.

摘要翻译： 单边带（SSB）混合器和提取SSB信号的方法，其能够使用多个混频器和本地振荡频率输出单个频率，而不必执行相移。 在一个实施例中，单边带（SSB）混频器包括第一混频器和第二混频器，其中第一和第二混频器将输入IF（中频）信号乘以具有相同输入IF信号频率的本地IF信号; 带通滤波器，其通过从第一混频器输出的上边带信号; 第三混频器，其将从带通滤波器输出的上边带信号乘以LO（本地振荡）信号; 第四混频器，将从第二混频器输出的信号乘以LO信号; 以及从第四混频器的输出信号中减去第三混频器的输出信号的减法装置。 因此，不需要以高频将本地振荡信号的相位移位90°的正交本地振荡器。 此外，由于SSB混频器将相同的本地振荡频率信号施加到每个混频器，所以通过实验可以将针对不期望信号的抑制特性达到约70dB的水平。