Beamforming in combination with space-time diversity for broadband OFDM systems

Author

Dammann, Armin ; Raulefs, Ronald ; Kaiser, Stefan

Author_Institution

Inst. of Commun. & Navigation, German Aerosp. Center, Oberpfaffenhofen, Germany

Volume

1

fYear

2002

fDate

2002

Firstpage

165

Lastpage

171

Abstract

We investigate broadband OFDM systems which apply beamforming in combination with different space-time diversity techniques. Various beamforming scenarios with transmitter and/or receiver sided beamforming are considered. Space-time diversity is obtained by cyclic delay diversity (CDD) in order to artificially shape the spectrum of the received signal. Thus, an advantageous distribution of the errors before a Viterbi channel decoder is obtained. Simulation results for the bit error rate performance are presented and compared for OFDM systems applying different beamforming scenarios and CDD in a Rayleigh fading channel. Maximum ratio combining (MRC) of the signals received on multiple beams/antennas is also taken into account in the performance analysis

Keywords

OFDM modulation; Rayleigh channels; Viterbi decoding; array signal processing; broadband networks; cellular radio; delays; digital radio; diversity reception; error statistics; radio receivers; radio transmitters; BER performance; Rayleigh fading channel; Viterbi channel decoder; beamforming; bit error rate performance; broadband OFDM systems; cell interference minimization; cyclic delay diversity; error distribution; maximum ratio combining; multipath transmission; orthogonal frequency division multiplexing; performance analysis; received signal spectrum shaping; receiver sided beamforming; simulation results; space-time diversity; transmitter; transmitter sided beamforming; wireless digital systems; Array signal processing; Bit error rate; Decoding; Delay; Diversity reception; Fading; OFDM; Receiving antennas; Transmitters; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2002. ICC 2002. IEEE International Conference on

Conference_Location

New York, NY

Print_ISBN

0-7803-7400-2

Type

conf

DOI

10.1109/ICC.2002.996838

Filename

996838