Interference avoidance versus iterative water filling in multiaccess vector channels

Author

Popescu, Dimitrie C. ; Popescu, Otilia ; Rose, Christopher

Author_Institution

Dept. of Electr. Eng., Texas Univ., San Antonio, TX, USA

Volume

3

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

2058

Abstract

We present an analysis of the relationship between the application of greedy interference avoidance and that of iterative water filling for vector multiaccess channels. The two methods converge to fixed points with similar properties corresponding to maximum sum capacity. However, the former is used for optimizing CDMA codewords, whereas the latter is used for optimizing transmit covariance matrices. We present numerical results from simulations and make a parallel between the two procedures, discussing differences and similarities.

Keywords

code division multiple access; covariance matrices; interference suppression; iterative methods; radiofrequency interference; CDMA codeword optimization; greedy interference avoidance; iterative water filling; multiaccess channels; multiaccess vector channels; transmit covariance matrix optimization; Covariance matrix; Equations; Filling; Interference; Iterative methods; Matched filters; Multiaccess communication; Numerical simulation; Optimization methods; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1400402

Filename

1400402