Hidden Pilot Based Precoder Design for MIMO-OFDM Systems

In order to improve bandwidth efficiency and bit error rate (BER) performance, a new hidden pilot scheme using a precoder is proposed for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. We show that the inevitable data interference of the hidden pilot...

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Bibliographic Details
Published in:IEEE communications letters 2008-09, Vol.12 (9), p.657-659
Main Authors: Kim, B.W., Jung, S.-Y., Kim, J., Park, D.-J.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Bandwidth
bandwidth efficiency
Bit error rate
Channel estimation
Channels
Covariance matrix
Degradation
Design engineering
Detection, estimation, filtering, equalization, prediction
Discrete Fourier transforms
Exact sciences and technology
Gain
hidden pilot
Information, signal and communications theory
Interference
MIMO
MIMO-OFDM
Multiplexing
OFDM
Orthogonal Frequency Division Multiplexing
Pilots
precoder
Radiocommunications
Receiving antennas
Signal and communications theory
Signal, noise
Spreading
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary:In order to improve bandwidth efficiency and bit error rate (BER) performance, a new hidden pilot scheme using a precoder is proposed for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. We show that the inevitable data interference of the hidden pilot, which degrades the performance of channel estimation, can be reduced successfully by the precoder design for each antenna with the aid of an iterative scheme. We also show that frequency diversity gain can be achieved due to the spreading effect of the precoder. Computer simulations are presented in which the proposed scheme is compared with conventional methods with respect to channel estimation, BER and bandwidth efficiency.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2008.080681