无线电接收器

Radio receiver

Abstract

一种无线电接收器可配置成在低IF和零IF模式下工作,并最大限度再利用模式间的模数变换电路。该接收器包括:正交下变频器(108,110,112,114),用以产生中频的同相(I)和正交(Q)信号;以及复合滤波器(516),用以进行图像载波抑制滤波。在低IF模式,滤波器(516)的输出之一(Q)被终止,另一输出(I)由非复数ADC(520)数字化,然后该数字信号被滤波和抽取。然后再重新产生与正交有关的IF信号、进行下变频和解调。在零IF模式,滤波器(516)的两个输出均数字化和并行处理,然后解调。由于可以对非复信号在低IF下作模数变换和信道滤波,所以可以只用两个非复数ADC(120,1620)。从而避免了电路重复,并大大节约了功率。

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Cited By (6)

    Publication numberPublication dateAssigneeTitle
    CN-100553160-COctober 21, 2009威盛电子股份有限公司Radio receiver and its method
    CN-101075818-BFebruary 16, 2011捷讯研究有限公司具有适应无线电环境的低if接收机电路的移动无线通信设备
    CN-1941651-BMarch 28, 2012爱特梅尔(德国)有限公司信号转变装置及包含该装置的发射/接收装置和集成电路
    GB-2413908-ANovember 09, 2005Via Tech IncRadio receiver supporting multiple modulation formats with a single pair of ADCs
    GB-2413908-BJune 07, 2006Via Tech IncRadio receiver supporting multiple modulation formats with a single pair of ADCs
    WO-2005002073-A1January 06, 2005Via Technologies, Inc.Radio receiver supporting multiple modulation formats with a single pair of adcs