Title :
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
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;
Conference_Titel :
Communications (QBSC), 2010 25th Biennial Symposium on
Conference_Location :
Kingston, ON
Print_ISBN :
978-1-4244-5709-0
DOI :
10.1109/BSC.2010.5472995
