Non-reciprocal transceivers in OFDM/SDMA systems: impact and mitigation

Author

Bourdoux, Andre ; Come, Boris ; Khaled, Nadia

Author_Institution

DESICS, IMEC, Leuven, Belgium

fYear

2003

fDate

10-13 Aug. 2003

Firstpage

183

Lastpage

186

Abstract

Channel reciprocity is needed in SDMA or MIMO downlink pre-filtering when the channel knowledge is acquired in the uplink. We first show analytically that the non-reciprocity of the base station analog hardware, which is part of the channel, introduces a very high level of multi-user interference and quantify the effect of the non-reciprocity by means of simulations. We then propose a novel calibration technique at the base station that enables to compensate for the non-reciprocity and reduce the MUI to a negligible value while having a low implementation cost.

Keywords

MIMO systems; OFDM modulation; filtering theory; radio links; radiofrequency interference; space division multiple access; telecommunication channels; transceivers; Channel reciprocity; MIMO downlink prefiltering; OFDM systems; SDMA systems; base station analog hardware; calibration technique; channel knowledge; low implementation cost; multiuser interference; nonreciprocal transceivers; Analytical models; Base stations; Calibration; Downlink; Hardware; Interference; MIMO; Multiaccess communication; OFDM; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Conference, 2003. RAWCON '03. Proceedings

Print_ISBN

0-7803-7829-6

Type

conf

DOI

10.1109/RAWCON.2003.1227923

Filename

1227923