Blind interference cancellation schemes for DS-CDMA systems

Author

Raju, Karthikesh ; Huovine, Toni ; Ristaniemi, Tapani

fYear

2005

fDate

3-8 July 2005

Firstpage

73

Abstract

We consider the use of independent component analysis (ICA) (Hyvärinen, A. et al., 2001) to circumvent the main bottlenecks of conventional methods for the DS-CDMA interference cancellation problem. In the uplink, we present a single antenna interference cancellation scheme (Huovinen, T. and Ristaniemi, T., Proc. IEEE SPAWC, 2004) wherein internal MAI as well as external interference is mitigated using a combination of ICA and the principle of conventional successive interference cancellation (SIC). For the downlink case, we look at an antenna array scheme (Raju, K. et al., IEEE Trans. Wireless Commun., 2002), where ICA acts as a pre-filter to conventional detection, separating the information component from the interference component and thus providing an interference-free signal to conventional receivers.

Keywords

antenna arrays; array signal processing; code division multiple access; independent component analysis; interference suppression; radio receivers; radiofrequency filters; radiofrequency interference; spread spectrum communication; DS-CDMA systems; ICA; MAI; RAKE receiver; SIC; antenna array scheme; antenna interference cancellation scheme; blind interference cancellation schemes; independent component analysis; prefilter; successive interference cancellation; Array signal processing; Downlink; Independent component analysis; Interference cancellation; Multiaccess communication; Multiple access interference; Multiuser detection; Signal processing; Silicon carbide; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2005 IEEE

Print_ISBN

0-7803-8883-6

Type

conf

DOI

10.1109/APS.2005.1552743

Filename

1552743