Direct Conversion Front End for LTE and LTE-A with Frequency-Translational Feedback, Harmonic Rejection Mixer and Input Matching Compensation
(2016) EITM01 20152Department of Electrical and Information Technology
- Abstract
- This thesis covers the design of a wideband, flexible front end for LTE and LTE-A in a 65 nm CMOS process. A topology with global frequency translational feedback is investigated and a harmonic rejection mixer is implemented. To compensate for parasitics at the RF input, a variable phase shift is used in the global feedback to improve input matching and prevent loss of noise performance. Combinations of these techniques are compared to a standard quadrature implementation. The suitability of three different baseband amplifiers for the circuit is also evaluated.
The full system is functional between 700 MHz and 3.7 GHz and has a noise
figure of between 1.5 and 1.3 dB depending on frequency of operation. The system provides 43 dB of gain... (More) - This thesis covers the design of a wideband, flexible front end for LTE and LTE-A in a 65 nm CMOS process. A topology with global frequency translational feedback is investigated and a harmonic rejection mixer is implemented. To compensate for parasitics at the RF input, a variable phase shift is used in the global feedback to improve input matching and prevent loss of noise performance. Combinations of these techniques are compared to a standard quadrature implementation. The suitability of three different baseband amplifiers for the circuit is also evaluated.
The full system is functional between 700 MHz and 3.7 GHz and has a noise
figure of between 1.5 and 1.3 dB depending on frequency of operation. The system provides 43 dB of gain and has an out-of-band IIP3 and CP1dB of -8 and -23 dBm, respectively. The current consumption is 21 mA from a 1.2 V supply and includes the consumption of the LNTA and baseband amplifiers. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/8878690
- author
- Andersson Hägglund, Douglas LU
- supervisor
-
- Anders Nejdel LU
- Markus Törmänen LU
- organization
- alternative title
- Globalt återkopplad radiomottagare
- course
- EITM01 20152
- year
- 2016
- type
- H2 - Master's Degree (Two Years)
- subject
- report number
- LU/LTH-EIT 2016-504
- language
- English
- id
- 8878690
- date added to LUP
- 2016-06-09 13:13:28
- date last changed
- 2016-06-09 13:13:28
@misc{8878690, abstract = {{This thesis covers the design of a wideband, flexible front end for LTE and LTE-A in a 65 nm CMOS process. A topology with global frequency translational feedback is investigated and a harmonic rejection mixer is implemented. To compensate for parasitics at the RF input, a variable phase shift is used in the global feedback to improve input matching and prevent loss of noise performance. Combinations of these techniques are compared to a standard quadrature implementation. The suitability of three different baseband amplifiers for the circuit is also evaluated. The full system is functional between 700 MHz and 3.7 GHz and has a noise figure of between 1.5 and 1.3 dB depending on frequency of operation. The system provides 43 dB of gain and has an out-of-band IIP3 and CP1dB of -8 and -23 dBm, respectively. The current consumption is 21 mA from a 1.2 V supply and includes the consumption of the LNTA and baseband amplifiers.}}, author = {{Andersson Hägglund, Douglas}}, language = {{eng}}, note = {{Student Paper}}, title = {{Direct Conversion Front End for LTE and LTE-A with Frequency-Translational Feedback, Harmonic Rejection Mixer and Input Matching Compensation}}, year = {{2016}}, }