Low Complexity Adaptive Channel Estimation and QR Decomposition for an LTE-A Downlink

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This paper presents a link adaptive processor to
perform low-complexity channel estimation and QR decomposition
(QRD) in Long Term Evolution-Advanced (LTE-A) receivers.
The processor utilizes frequency domain correlation of the propagation
channel to adaptively avoid unnecessary computations in
the received signal processing, achieving significant complexity
reduction with negligible performance loss. More specifically, a
windowed Discrete Fourier transform (DFT) algorithm is used to
detect channel conditions and to compute a minimum number of
sparse subcarrier channel estimates required for low complexity
linear QRD interpolation. Furthermore, the sparsity of subcarrier
channel estimates can be adaptively changed to handle different
channel conditions. Simulation results demonstrate a reduction
of 40%-80% in computational complexity for different channel
models specified in the LTE-A standard.


Enheter & grupper

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Elektroteknik och elektronik
Titel på värdpublikation2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC)
FörlagIEEE - Institute of Electrical and Electronics Engineers Inc.
ISBN (elektroniskt)978-1-4799-4912-0
StatusPublished - 2015 jun 29
Peer review utfördJa
EvenemangIEEE 25th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2014 - Washington DC, USA
Varaktighet: 2014 sep 22014 sep 5


KonferensIEEE 25th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2014
OrtWashington DC


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