کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10365221 | 871971 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
RF front-end architecture for a triple-band CMOS GPS receiver
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
سخت افزارها و معماری
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چکیده انگلیسی
This paper describes a triple-band global positioning system (GPS) receiver that simultaneously covers the L1, L2, and L5 frequency bands. The proposed receiver uses an image-rejection technique that can separate signals from the three frequency bands to three corresponding ports. It uses a single RF path containing a low-noise amplifier (LNA), and active and passive mixers with a pair of local oscillator signals. A triple-band GPS RF front-end chip was fabricated using 130Â nm CMOS technology. The noise figure of this chip is less than 7Â dB and its S11 coefficient is less than â10Â dB in the 1.15-1.6Â GHz frequency range. The power consumption of the LNA and mixers is 7.2Â mW when using a 1.2Â V supply voltage. The image-rejection ratio (IMRR) between L1 and the other (L2 and L5) band signals is 40Â dB, while that between the L2 and L5 signals is 37-38Â dB. To improve the IMRR between the L2 and L5 signals, we investigated the utilization of a digital compensation technique. This technique was confirmed to have improved the IMRR by about 12Â dB.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microelectronics Journal - Volume 46, Issue 1, January 2015, Pages 27-35
Journal: Microelectronics Journal - Volume 46, Issue 1, January 2015, Pages 27-35
نویسندگان
Ikkyun Jo, Jungnam Bae, Toshimasa Matsuoka, Takuji Ebinuma,