Full-Diversity and Fast ML Decoding Properties of General Orthogonal Space-Time Block Codes for MIMO-OFDM Systems

Author

Zhang, Wei ; Xia, Xiang-Gen ; Ching, P.C.

Author_Institution

Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon

Volume

6

Issue

5

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

1647

Lastpage

1653

Abstract

In this letter we apply the general orthogonal space-time block codes (OSTBC) to MIMO-OFDM systems over frequency-selective fading channels and aim to exploit the potential multipath diversity. By replacing the scalar entry of an OSTBC matrix with the vector of repeated symbols, we obtain a new OSTBC which can achieve both spatial diversity and multipath diversity. Moreover, a fast maximum likelihood (ML) decoding is admitted. Simulation results show that the proposed OSTBC, for two transmit antennas, can obtain a higher diversity gain than the Alamouti code at the same ML decoding complexity

Keywords

MIMO communication; OFDM modulation; block codes; channel coding; diversity reception; fading channels; maximum likelihood decoding; space-time codes; Alamouti code; MIMO-OFDM systems; ML decoding; OSTBC; frequency-selective fading channels; full-diversity; general orthogonal space-time block codes; maximum likelihood decoding; multipath diversity; spatial diversity; Acoustical engineering; Block codes; Diversity methods; Frequency-selective fading channels; MIMO; Maximum likelihood decoding; Multipath channels; OFDM; Receiving antennas; Transmitting antennas;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2007.360366

Filename

4202170