Interpolation based pilot-aided channel estimation for STBC spatial modulation and performance analysis under imperfect CSI
Abstract
A combination of space-time block coding and spatial modulation (STBC-SM) has been recently proposed for multiple input-multiple output systems to obtain both spatial diversity gain and more capacity simultaneously while assuming the perfect channel state information (P-CSI) was available at the receiver. However, in practical scenarios the CSI is unknown to the receiver and should be estimated in order to detect the transmitted data in a reliable way. Therefore, channel estimation (CE) is a major challenge in designing the STBC-SM systems. In this study, the problem of CE is investigated and a new pilot-aided channel estimation (PA-CE) technique, coupled with an interpolation, is proposed for the STBC-SM systems operating in the presence of rapidly time-varying mobile channels. Several interpolation schemes such as the linear, nearest neighbour, piecewise cubic Hermite and the low-pass interpolations are applied and their performances are compared to determine the best suitable interpolation technique to be employed in STBC-SM systems. Bit error rate (BER) performance of the proposed CE technique is then investigated in time-varying channels with different modulation. Moreover, the pairwise error probability of the STBC-SM scheme is derived and its average bit error probability is evaluated analytically in the presence of CE errors.
Subject
channel estimation
space-time block codes
diversity reception
MIMO communication
interpolation
mobile radio
time-varying channels
error statistics
quadrature phase shift keying
quadrature amplitude modulation
interpolation-based pilot-aided channel estimation
STBC spatial modulation
imperfect CSI
space-time block coding
multiple-input multiple-output systems
spatial diversity gain
perfect channel state information
P-CSI
STBC-SM systems
PA-CE technique
time-varying mobile channels
linear nearest neighbour piecewise cubic Hermite
low-pass interpolation
bit error rate performance
BER performance
quadrature phase shift keying
QPSK
16-quadrature amplitude modulation
16-QAM
64-QAM
pairwise error probability
bit error probability
Spline Interpolation
Systems
Diversity
space-time block codes
diversity reception
MIMO communication
interpolation
mobile radio
time-varying channels
error statistics
quadrature phase shift keying
quadrature amplitude modulation
interpolation-based pilot-aided channel estimation
STBC spatial modulation
imperfect CSI
space-time block coding
multiple-input multiple-output systems
spatial diversity gain
perfect channel state information
P-CSI
STBC-SM systems
PA-CE technique
time-varying mobile channels
linear nearest neighbour piecewise cubic Hermite
low-pass interpolation
bit error rate performance
BER performance
quadrature phase shift keying
QPSK
16-quadrature amplitude modulation
16-QAM
64-QAM
pairwise error probability
bit error probability
Spline Interpolation
Systems
Diversity
Collections
- Makaleler / Articles [71]
- Scopus Publications [724]
- WoS Publications [1016]
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