Design of a dual-channel multi-mode GNSS receiver with a∑△ fractional-N synthesizer  

作　　者：龙强 庄奕琪 阴玥 李乐 王晋 李振荣 刘乾坤 王磊 

机构地区：[1]National Key Laboratory of Wide Band-Gap Semiconductor Technology,School of Microelectronics,Xi'dian University [2]China Key System,CETC,Wuxi 214072,China

出　　处：《Journal of Semiconductors》2012年第11期83-89,共7页半导体学报（英文版）

摘　　要：A 72 mW highly integrated dual-channel multimode GNSS（global navigation satellite system） receiver with aΣ△fractional-N synthesizer which covers GPS L1 and the Compass B1/B2/B3 band is presented.This chip was fabricated in a TSMC CMOS 0.18μm process and packaged in a 48-pin 3×3 mm^2 land grid array chip scale package.This work achieves NF≤5.3 dB without an external LNA,channel gain = 105 dB for channel one （Compass B2 and B3 band）,and channel gain = 110 dB for channel two（GPS L1 and Compass B1 band）.Image rejection（IMRR） = 36 dB,phase noise is -115.9 dBc @ 1 MHz and -108.9 dBc @ 1 MHz offset from the carrier for the two channels separately.At the low power consumption,multibands of GNSS are compatible in one chip, which is easy for consumers to use,when two different navigation signals are received simultaneously.A 72 mW highly integrated dual-channel multimode GNSS（global navigation satellite system） receiver with aΣ△fractional-N synthesizer which covers GPS L1 and the Compass B1/B2/B3 band is presented.This chip was fabricated in a TSMC CMOS 0.18μm process and packaged in a 48-pin 3×3 mm^2 land grid array chip scale package.This work achieves NF≤5.3 dB without an external LNA,channel gain = 105 dB for channel one （Compass B2 and B3 band）,and channel gain = 110 dB for channel two（GPS L1 and Compass B1 band）.Image rejection（IMRR） = 36 dB,phase noise is -115.9 dBc @ 1 MHz and -108.9 dBc @ 1 MHz offset from the carrier for the two channels separately.At the low power consumption,multibands of GNSS are compatible in one chip, which is easy for consumers to use,when two different navigation signals are received simultaneously.

关 键 词：compass G_m-C filter Σ△fractional-N synthesizer LNA GNSS 

分 类 号：TN967.1[电子电信—信号与信息处理]