Feedback schemes for FDD WCDMA systems in multipath environments

Author

Hämäläinen, Jyri ; Wichman, Risto

Author_Institution

Nokia Networks, Oulu, Finland

Volume

1

fYear

2001

fDate

2001

Firstpage

238

Abstract

Transmit diversity techniques provide attractive solutions for increasing downlink capacity in 3G systems within low-mobility environments. Open-loop and closed-loop transmit diversity modes with two transmit antennas have already been included into 3GPP WCDMA Release 4, and at the moment schemes exploiting a larger number of transmit antennas are being developed. This paper analyzes the performance of the 3GPP WCDMA closed-loop modes in multipath Rayleigh fading channels. We use signal-to-noise ratio (SNR) gain as a performance measure, which corresponds to the gain in expected SNR when feedback information from the receiver is applied in the transmitter

Keywords

Rayleigh channels; cellular radio; code division multiple access; diversity reception; feedback; frequency division multiplexing; multipath channels; transmitting antennas; 3GPP WCDMA Release 4; FDD WCDMA systems; Rayleigh fading channels; feedback schemes; low-mobility environments; multipath environments; transmit antennas; transmit diversity; Antenna measurements; Downlink; Fading; Feedback; Gain measurement; Multiaccess communication; Performance analysis; Performance gain; Signal to noise ratio; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd

Conference_Location

Rhodes

ISSN

1090-3038

Print_ISBN

0-7803-6728-6

Type

conf

DOI

10.1109/VETECS.2001.944839

Filename

944839