Hidden Pilot Based Precoder Design for MIMO-OFDM Systems

Author

Byung Kim ; Jung, Sung-Yoon ; Kim, Joontae ; Park, Dong-Jo

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon

Volume

12

Issue

9

fYear

2008

fDate

9/1/2008 12:00:00 AM

Firstpage

657

Lastpage

659

Abstract

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.

Keywords

MIMO systems; OFDM modulation; channel estimation; error statistics; iterative decoding; precoding; MIMO-OFDM systems; bandwidth efficiency; bit error rate; channel estimation; frequency diversity gain; hidden pilot scheme; orthogonal frequency division multiplexing; precoder design; Bandwidth; Bit error rate; Channel estimation; Covariance matrix; Degradation; Discrete Fourier transforms; Interference; MIMO; OFDM; Receiving antennas; MIMO-OFDM; bandwidth efficiency; hidden pilot; precoder;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2008.080681

Filename

4623770