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Direct Conversion Front End for LTE and LTE-A with Frequency-Translational Feedback, Harmonic Rejection Mixer and Input Matching Compensation

Andersson Hägglund, Douglas LU (2016) EITM01 20152
Department 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)
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author
Andersson Hägglund, Douglas LU
supervisor
organization
alternative title
Globalt återkopplad radiomottagare
course
EITM01 20152
year
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},
}