On the uplink-downlink duality for Gaussian vector channels with colored noise and applications to CDMA transmitter adaptation

Author

Popescu, Dimitrie C. ; Abraham, Shiny ; Popescu, Otilia ; Dobre, Octavia A.

Author_Institution

ECE Dept., Old Dominion Univ., Norfolk, VA, USA

fYear

2010

fDate

12-14 May 2010

Firstpage

96

Lastpage

99

Abstract

In this paper we study the uplink-downlink duality for Gaussian vector channels with colored noise, and we derive the duality transformations (downlink-to-uplink and vice versa) that imply transmit co-variance matrices for which user rates in uplink and downlink are identical. These transformations are then applied for transmitter adaptation in Code Division Multiple Access (CDMA) systems to obtain an ensemble of downlink CDMA codewords from an optimal ensemble of uplink codewords.

Keywords

code division multiple access; codes; CDMA transmitter adaptation; Gaussian vector channels; code division multiple access systems; colored noise; covariance matrices; downlink CDMA codewords; duality transformation; optimal ensemble; uplink codewords; uplink-downlink duality; Additive noise; Base stations; Colored noise; Covariance matrix; Downlink; Gaussian noise; Mathematical model; Multiaccess communication; Statistics; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (QBSC), 2010 25th Biennial Symposium on

Conference_Location

Kingston, ON

Print_ISBN

978-1-4244-5709-0

Type

conf

DOI

10.1109/BSC.2010.5472995

Filename

5472995