公开(公告)号：US20140098913A1

公开(公告)日：2014-04-10

申请号：US13647332

申请日：2012-10-08

Applicant: QUALCOMM INCORPORATED

Inventor： Daniel Jose FERNANDES BARROS ,  Le Nguyen LUONG ,  James Young HURT ,  Yann LY-GAGNON ,  Paul James HUSTED

IPC: H04B1/10

CPC classification number: H04B1/1036 ,  G01S19/235 ,  H03D3/009 ,  H03J7/04 ,  H04B1/1027 ,  H04L27/2647 ,  H04L27/3809 ,  H04L27/3863 ,  H04L2027/003

Abstract: Systems and methods are disclosed for compensating I-Q imbalance in a wireless receiver. The receiver may employ a quadrature downconverter configured to receive an RF signal input and output an in-phase component and a quadrature component at an IF, an IF rotation block configured to downconvert the in-phase and quadrature components to baseband and an I-Q correction block configured to compensate for an I-Q imbalance in the received signal, wherein the I-Q correction block is positioned downstream from the IF rotation block in the signal path. Performing the I-Q correction after conversion to baseband may allow the compensation calculations to operate at a reduced digital rate. Similarly, digitally adjusting the gain of the signal prior to I-Q compensation may reduce the number of bits that are manipulated during the compensation process. These features may represent significant efficiencies as compared to I-Q corrections performed at IF.

Abstract translation: 公开了用于补偿无线接收机中的I-Q不平衡的系统和方法。 接收机可以采用正交下变频器，其被配置为接收RF信号输入并输出IF的同相分量和正交分量，IF旋转块被配置为将同相和正交分量下变频到基带和IQ校正块 被配置为补偿接收信号中的IQ不平衡，其中IQ校正块位于信号路径中的IF旋转块的下游。 在转换为基带后执行I-Q校正可能允许补偿计算以降低的数字速率运行。 类似地，在I-Q补偿之前数字调整信号的增益可以减少在补偿处理期间被操纵的位数。 与IF执行的I-Q校正相比，这些特征可能表现出显着的效率。