Paper Info
Title
Dynamic Pilot Allocation Channel Estimation with Spatial Multiplexing for MIMO-OFDM Systems
Abstract
In this paper, we investigate a dynamic pilot allocation algorithm for Discrete Fourier Transform (DFT)-based channel estimation in MIMO-OFDM systems, which employs feedback to adapt pilot locations to mobile channels for different receivers (ZF-linear, ZF-SIC, MMSE-linear, MMSE-SIC). The pilot allocation is dynamically controlled by feedback of the pilot allocation index so to optimize SER performance. Furthermore, mathematical expressions of the instantaneous signal to interference and noise ratio (SINR) in the presence of channel estimation error for different receivers are derived to obtain the error probabilities of data subcarriers through an approximate error probability function for MPSK modulation. The pilot locations are based on these error probabilities to avoid data symbols transmitted over these subcarriers with high error probabilities instead of pilots over them. Simulation results are provided to illustrate the performance gains achieved with these receivers by this dynamic pilot allocation.
Year
DOI
Venue
2011
10.1109/VETECS.2011.5956755
Vehicular Technology Conference
Keywords
Field
DocType
MIMO communication,OFDM modulation,channel allocation,channel estimation,discrete Fourier transforms,error statistics,phase shift keying,radiofrequency interference,space division multiplexing,wireless channels,MIMO-OFDM systems,MPSK modulation,approximate error probability function,data subcarriers,data symbols,discrete Fourier transform,dynamic pilot allocation channel estimation,instantaneous signal to interference and noise ratio,mathematical expressions,mobile channels,pilot allocation index,receivers,spatial multiplexing
MIMO-OFDM,Computer science,Communication channel,Electronic engineering,Interference (wave propagation),Discrete Fourier transform,Channel allocation schemes,Spatial multiplexing,Orthogonal frequency-division multiplexing,Phase-shift keying
Conference
ISSN
ISBN
Citations 
1550-2252
978-1-4244-8332-7
0
PageRank 
References 
Authors
0.34
12
3
Name
Order
Citations
PageRank
Li (Alex) Li153.17
de Lamare, R.C.265233.42
Alister G. Burr335765.67