公开(公告)号：US20050143043A1

公开(公告)日：2005-06-30

申请号：US10748425

申请日：2003-12-30

Applicant: Donald Kerth

Inventor： Donald Kerth

IPC: H04B1/28 ,  H04B1/26 ,  H04B1/16 ,  H04B15/00

CPC classification number: H04B1/0007 ,  H04B1/28

Abstract: A chopped intermediate frequency (IF) wireless receiver is disclosed. The wireless receiver includes a local oscillator (LO), a first and a second mixers, an LO frequency control module, an IF filter, a digital down converter and a down conversion controller. The LO provides a local oscillating signal to the first and second mixers. The first and second mixers-converts a received radio frequency signal to an in-phase IF signal and a quadrature IF signal, respectively. The LO frequency control module alternately down converts a channel frequency by changing an oscillation frequency of the LO. Coupled to the digital down converter, the down conversion controller adjusts a complex sine wave within the digital down converter while the in-phase IF signal and the quadrature IF signal are being down-converted by the digital down converter to a baseband signal.

Abstract translation: 公开了一种斩波中频（IF）无线接收机。 无线接收机包括本地振荡器（LO），第一和第二混频器，LO频率控制模块，IF滤波器，数字下变频器和下变频控制器。 LO向第一和第二混合器提供本地振荡信号。 第一和第二混频器将接收到的射频信号分别转换为同相IF信号和正交IF信号。 LO频率控制模块通过改变LO的振荡频率来交替地下变频通道频率。 耦合到数字下变频器，下变频控制器调整数字下变频器内的复正弦波，同时IF信号和正交IF信号由数字下变频器下变频为基带信号。

公开(公告)号：US20050143040A1

公开(公告)日：2005-06-30

申请号：US10749012

申请日：2003-12-30

Applicant: Donald Kerth ,  G. Tuttle

Inventor： Donald Kerth ,  G. Tuttle

IPC: H04B1/28 ,  H04B1/10

CPC classification number: H04B1/0007 ,  H04B1/28

Abstract: A method and apparatus for enhancing signal quality within a wireless receiver are disclosed. An image of a desired signal is down-converted to a baseband signal by a digital down converter. The energy of the baseband signal is subsequently determined. If the energy of the baseband signal is equal to or greater than a predetermined threshold, then the IF is swapped for any incoming signals. If the energy of the baseband signal is less than the predetermined threshold, then the IF is maintained for any incoming signals.

Abstract translation: 公开了一种用于增强无线接收机内的信号质量的方法和装置。 所需信号的图像由数字下变频器下变频为基带信号。 随后确定基带信号的能量。 如果基带信号的能量等于或大于预定阈值，则IF被交换用于任何输入信号。 如果基带信号的能量小于预定阈值，则对于任何输入信号都保持IF。