Capacity of Alamouti Coded OFDM Systems in Time-Varying Multipath Rayleigh Fading Channels

Author

Wang, Jiacheng ; Wen, O.Y. ; Shaoqian Li ; Cheng, R.S.K.

Author_Institution

Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1923

Lastpage

1927

Abstract

The orthogonal frequency division multiplexing (OFDM) systems that exploit Alamouti transmit diversity technique can be divided into two categories, i.e. Alamouti space-time block-coded OFDM (STBC-OFDM) and space-frequency block-coded OFDM (SFBC-OFDM). In time-varying multipath Rayleigh fading channels, these systems suffer from both time and frequency selectivity of channels. Recently, several detection schemes have been proposed to improve the bit error rate (BER) performance of these systems. In this paper, the achievable average capacities of different detectors are investigated. Based on the probability density function (pdf) of the effective instantaneous signal-to-noise ratio (SNR) obtained by each detector, the analytical expressions of achievable average capacities for those systems with different detectors are derived. Numerical results are also presented to give some insights

Keywords

OFDM modulation; Rayleigh channels; block codes; channel coding; diversity reception; error statistics; modulation coding; multipath channels; space-time codes; time-varying channels; Alamouti space-time block-coded OFDM; Alamouti transmit diversity technique; BER; Rayleigh fading channels; bit error rate; channels capacity; orthogonal frequency division multiplexing; probability density function; signal-to-noise ratio; space-frequency block-coded OFDM; time-varying multipath channels; Bit error rate; Capacity planning; Detectors; Fading; Intersymbol interference; Maximum likelihood detection; OFDM; Probability density function; Signal to noise ratio; Time varying systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683181

Filename

1683181