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Improved Matching-Pursuit Implementation for LTE Channel Estimation

Löfgren, Johan LU ; Liu, Liang LU ; Edfors, Ove LU and Nilsson, Peter LU (2014) In IEEE Transactions on Circuits and Systems Part 1: Regular Papers 61(1). p.226-237
Abstract
In this paper an implementation of a reduced complexity matching pursuit channel estimator for LTE is presented. The design contains an FFT/IFFT module with non-radix 2 units and the core estimator. The FFT/IFFT module is flexible enough to perform both operations using the same hardware. Based on prior work the needed internal word lengths are found. Internal shifts are employed to maximize the use of available resources. The design is implemented in a 65 nm low power process from STMicroelectronics. It is 1 mm2, including input pads and extra control logic. The estimator shows great improvement in speed compared to prior art, allowing 8 times the number of updates in the available time. This is due to both algorithm advancements and... (More)
In this paper an implementation of a reduced complexity matching pursuit channel estimator for LTE is presented. The design contains an FFT/IFFT module with non-radix 2 units and the core estimator. The FFT/IFFT module is flexible enough to perform both operations using the same hardware. Based on prior work the needed internal word lengths are found. Internal shifts are employed to maximize the use of available resources. The design is implemented in a 65 nm low power process from STMicroelectronics. It is 1 mm2, including input pads and extra control logic. The estimator shows great improvement in speed compared to prior art, allowing 8 times the number of updates in the available time. This is due to both algorithm advancements and implementation techniques. Power consumption of the estimator is simulated to 14.3 mW, running at 50 MHz. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fast Fourier Transform (FFT), Channel Estimation, Orthogonal Frequency- Division Multiplexing (OFDM), Very-Large-Scale Integration (VLSI).
in
IEEE Transactions on Circuits and Systems Part 1: Regular Papers
volume
61
issue
1
pages
226 - 237
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000330037500021
  • scopus:84892599948
ISSN
1549-8328
DOI
10.1109/TCSI.2013.2264695
language
English
LU publication?
yes
id
33580c20-111f-4c54-aaf9-cf4dff319c4b (old id 4023799)
date added to LUP
2013-09-16 10:27:51
date last changed
2017-08-06 03:28:28
@article{33580c20-111f-4c54-aaf9-cf4dff319c4b,
  abstract     = {In this paper an implementation of a reduced complexity matching pursuit channel estimator for LTE is presented. The design contains an FFT/IFFT module with non-radix 2 units and the core estimator. The FFT/IFFT module is flexible enough to perform both operations using the same hardware. Based on prior work the needed internal word lengths are found. Internal shifts are employed to maximize the use of available resources. The design is implemented in a 65 nm low power process from STMicroelectronics. It is 1 mm2, including input pads and extra control logic. The estimator shows great improvement in speed compared to prior art, allowing 8 times the number of updates in the available time. This is due to both algorithm advancements and implementation techniques. Power consumption of the estimator is simulated to 14.3 mW, running at 50 MHz.},
  author       = {Löfgren, Johan and Liu, Liang and Edfors, Ove and Nilsson, Peter},
  issn         = {1549-8328},
  keyword      = {Fast Fourier Transform (FFT),Channel Estimation,Orthogonal Frequency- Division Multiplexing (OFDM),Very-Large-Scale Integration (VLSI).},
  language     = {eng},
  number       = {1},
  pages        = {226--237},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Circuits and Systems Part 1: Regular Papers},
  title        = {Improved Matching-Pursuit Implementation for LTE Channel Estimation},
  url          = {http://dx.doi.org/10.1109/TCSI.2013.2264695},
  volume       = {61},
  year         = {2014},
}