Spatial multiplexing via antenna switching

Author

Alrabadi, Osama N. ; Papadias, Constantinos B. ; Kalis, Antonis ; Marchetti, Nicola ; Prasad, Ramjee

Author_Institution

Broadband Wireless & Sensor Networks Group (BWiSE), Athens Inf. Technol. (AIT), Athens, Greece

Volume

13

Issue

8

fYear

2009

fDate

8/1/2009 12:00:00 AM

Firstpage

594

Lastpage

596

Abstract

A simple scheme for spatially multiplexing two BPSK signals using a switched antenna system with a single RF chain, a shared RF-DC cable and a shared RF-DC feeding circuit is proposed. The idea is to modulate the first BPSK substream to one of the two array elements while exciting the second element parasitically by the field of the first one. The second substream is encoded in such a way to control which of the two elements will be driven. Decorrelating the two BPSK signals at the transmitter side is achieved by mapping the signals onto a set of orthogonal functions while the matching impedance of the two antenna elements is optimized for the maximum outage rate by maximizing the matching efficiency and minimizing the power imbalance between the basis functions, simultaneously.

Keywords

antenna arrays; antenna feeds; decorrelation; encoding; impedance matching; phase shift keying; space division multiplexing; BPSK signals; RF chain; RF-DC cable; RF-DC feeding circuit; antenna array; encoding; impedance matching; signal decorrelation; spatial multiplexing; switched antenna system; Antenna feeds; Binary phase shift keying; Decorrelation; Impedance; RF signals; Radio frequency; Signal mapping; Simultaneous localization and mapping; Switching circuits; Transmitters; Antenna switching, spatial multiplexing, shared RF-DC.;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2009.090971

Filename

5200896