Paper Info
Title
Adaptive Frequency-Domain RLS DFE for Uplink MIMO SC-FDMA
Abstract
It is well known that in the case of highly frequencyselective fading channels, the Linear Equalizer (LE) can suffer significant performance degradation compared to the Decision Feedback Equalizer (DFE). In this paper, we develop a low-complexity Adaptive Frequency Domain Decision Feedback Equalizer (AFD-DFE) for Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, where both the feedforward and feedback filters operate in the frequency-domain and are adapted using the well-known block Recursive Least Squares (RLS) algorithm. Since this DFE operates entirely in the frequency-domain, the complexity of the block RLS algorithm can be reduced substantially when compared to its time-domain counterpart by exploiting matrix structure in the frequencydomain. Furthermore, we extend our formulation to Multiple Input Multiple Output (MIMO) SC-FDMA systems where we show that the AFD-DFE enjoys a significant reduction in computational complexity when compared to the frequency-domain non-adaptive DFE. Finally, extensive simulations are carried out to demonstrate the robustness of our proposed AFD-DFE to high Doppler and Carrier Frequency Offset (CFO).
Year
DOI
Venue
2015
10.1109/TVT.2014.2349955
Vehicular Technology, IEEE Transactions  
Keywords
Field
DocType
matrix structure,adaptive control,frequency domain,feedforward neural networks,simulation,frequency domain analysis,mimo,input output devices
Frequency domain,Fading,Computer science,Control theory,Carrier frequency offset,MIMO,Electronic engineering,Adaptive control,Frequency-division multiple access,Recursive least squares filter,Feed forward
Journal
Volume
Issue
ISSN
PP
99
0018-9545
Citations 
PageRank 
References 
2
0.38
18
Authors
4
Name
Order
Citations
PageRank
Naveed Iqbal1176.03
Naofal Al-Dhahir22755319.65
Azzedine Zerguine334351.98
Abdelmalek B. C. Zidouri43010.37