Data throughput enhancement by frequency selectivity suppression in downlink DS-CDMA beamforming systems

Author

Kim, J.W. ; Sampei, Seiichi ; Morinaga, N.

Author_Institution

Dept. of Commun. Eng., Osaka Univ., Japan

Volume

40

Issue

23

fYear

2004

Firstpage

1494

Lastpage

1496

Abstract

A novel multi-transmit and multi-receive (MTMR) adaptive array antenna (AAA) system combined with analogue-type transmit power control (TPC) to suppress channel frequency selectivity is proposed. This technique increases throughput with adaptive modulation and coding (AMC) employed at the downlink of direct-sequence code division multiple access (DS-CDMA) systems. The proposed scheme employs beam directivity control using a path manipulation technique. Its superiority over the conventional AAA systems is demonstrated by computer simulation.

Keywords

adaptive antenna arrays; adaptive codes; adaptive modulation; array signal processing; code division multiple access; frequency selective surfaces; multifrequency antennas; multipath channels; radio links; receiving antennas; spread spectrum communication; transmitting antennas; DS-CDMA systems; adaptive array antenna system; adaptive coding; adaptive modulation; analogue type transmit power control; beam directivity control; channel frequency selectivity suppression; code division multiple access systems; computer simulation; data throughput enhancement; direct sequence beamforming systems; multiple receive antennas; multiple transmit antennas; path manipulation technique; radio links;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20046630

Filename

1358958