On ping-pong effects in linear interference cancellation for CDMA

Author

Rasmussen, Lars K.

Author_Institution

Dept. of Comput. Eng., Chalmers Univ. of Technol., Goteborg, Sweden

Volume

2

fYear

2000

fDate

2000

Firstpage

348

Abstract

In this paper we formulate a general iterative form to described hybrid interference cancellation, a concept which includes both successive interference cancellation (SIC) and parallel interference cancellation (PIC) as its two extreme cases. Furthermore, the ping-pong effect commonly observed in linear PIC is studied in detail and is shown to be a direct consequence of the extreme eigenvalues of the iteration matrix. Intervals for the dominating eigenvalues within which ping-pong is likely to occur are specified. These intervals are then used to determine weighting factors for partial cancellation such that ping-pong effects are avoided

Keywords

code division multiple access; eigenvalues and eigenfunctions; error statistics; interference suppression; iterative methods; land mobile radio; matrix algebra; multiuser channels; radiofrequency interference; BER; CDMA; biased decision statistic; eigenvalues; hybrid interference cancellation; iteration matrix; iterative form; linear PIC; linear interference cancellation; mobile radio; parallel interference cancellation; partial cancellation; ping-pong effects; successive interference cancellation; weighting factors; Convergence; Decorrelation; Delay; Detectors; Eigenvalues and eigenfunctions; Interference cancellation; Jacobian matrices; Multiaccess communication; Multiple access interference; Silicon carbide;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on

Conference_Location

Parsippany, NJ

Print_ISBN

0-7803-6560-7

Type

conf

DOI

10.1109/ISSSTA.2000.876454

Filename

876454