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A Fully Integrated Radio-Fiber Interface in 65 nm CMOS Technology

Ahmad, Waqas LU ; Törmänen, Markus LU and Sjöland, Henrik LU (2014) In IEEE Photonics Technology Letters 26(5). p.444-446
Abstract
In this work we present a fully integrated Radio-Fiber interface implemented in 65nm CMOS, intended for remote antenna units (RAUs) in distributed antenna systems. To relax the requirements on the optical components, an intermediate frequency (IF) signal (100MHz) is transmitted over the multi-mode fiber, which is then up-converted to 2.2GHz inside the RAU. Local Oscillator (LO) signals to the mixers are generated by an on-chip frequency synthesizer. The measured optical to electrical conversion gain\,(V/W) is 59\,dB, whereas the input referred current noise is 3.5pA/$\sqrt{\mathrm{Hz}}$ and SFDR is 96.5dBHz^2/3. An LO leakage of -40dBc and an image rejection ratio of 43\,dB is measured. The circuit achieves an adjacent channel leakage... (More)
In this work we present a fully integrated Radio-Fiber interface implemented in 65nm CMOS, intended for remote antenna units (RAUs) in distributed antenna systems. To relax the requirements on the optical components, an intermediate frequency (IF) signal (100MHz) is transmitted over the multi-mode fiber, which is then up-converted to 2.2GHz inside the RAU. Local Oscillator (LO) signals to the mixers are generated by an on-chip frequency synthesizer. The measured optical to electrical conversion gain\,(V/W) is 59\,dB, whereas the input referred current noise is 3.5pA/$\sqrt{\mathrm{Hz}}$ and SFDR is 96.5dBHz^2/3. An LO leakage of -40dBc and an image rejection ratio of 43\,dB is measured. The circuit achieves an adjacent channel leakage ratio (ACLR) of -39dB and -41dB, for a 10MHz 32QAM signal at output power of 1dBm, and a 3.84MHz QPSK signal at 4dBm, respectively. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Photonics Technology Letters
volume
26
issue
5
pages
444 - 446
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000331371200007
  • scopus:84894045309
ISSN
1041-1135
DOI
10.1109/LPT.2013.2295629
project
EIT_DISTRANT Distributed antenna systems for efficient wireless systems
language
English
LU publication?
yes
id
bf3729bd-227a-4a4c-9d64-be9bdafd0370 (old id 4196347)
alternative location
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6690149
date added to LUP
2013-12-18 10:38:52
date last changed
2017-11-12 03:33:16
@article{bf3729bd-227a-4a4c-9d64-be9bdafd0370,
  abstract     = {In this work we present a fully integrated Radio-Fiber interface implemented in 65nm CMOS, intended for remote antenna units (RAUs) in distributed antenna systems. To relax the requirements on the optical components, an intermediate frequency (IF) signal (100MHz) is transmitted over the multi-mode fiber, which is then up-converted to 2.2GHz inside the RAU. Local Oscillator (LO) signals to the mixers are generated by an on-chip frequency synthesizer. The measured optical to electrical conversion gain\,(V/W) is 59\,dB, whereas the input referred current noise is 3.5pA/$\sqrt{\mathrm{Hz}}$ and SFDR is 96.5dBHz^2/3. An LO leakage of -40dBc and an image rejection ratio of 43\,dB is measured. The circuit achieves an adjacent channel leakage ratio (ACLR) of -39dB and -41dB, for a 10MHz 32QAM signal at output power of 1dBm, and a 3.84MHz QPSK signal at 4dBm, respectively.},
  author       = {Ahmad, Waqas and Törmänen, Markus and Sjöland, Henrik},
  issn         = {1041-1135},
  language     = {eng},
  number       = {5},
  pages        = {444--446},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Photonics Technology Letters},
  title        = {A Fully Integrated Radio-Fiber Interface in 65 nm CMOS Technology},
  url          = {http://dx.doi.org/10.1109/LPT.2013.2295629},
  volume       = {26},
  year         = {2014},
}