Noncoherent MMSE interference suppression for DS-CDMA

Author

Schober, Robert ; Gerstacker, Wolfgang H. ; Lampe, Alexander

Author_Institution

Lab. fur Nachrichtentechnik, Erlangen-Nurnberg Univ., Germany

Volume

2

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

555

Abstract

In this paper, a novel robust noncoherent receiver for MMSE interference suppression for DS-CDMA is proposed. The receiver consists of an MMSE filter and a decision-feedback differential detector (DF-DD). The performance of the proposed scheme is investigated analytically and by computer simulations. It is shown that the loss compared to coherent MMSE interference suppression is limited and can be made arbitrarily small by increasing the observation window used for calculation of the reference symbol of the DF-DD. For adjustment of the MMSE filter coefficients a noncoherent normalized least-mean-square (NC-NLMS) algorithm is proposed which is robust against channel phase variations

Keywords

code division multiple access; digital filters; interference suppression; least mean squares methods; receivers; spread spectrum communication; DF-DD; DS-CDMA; MMSE filter; NC-NLMS algorithm; channel phase variations; decision-feedback differential detector; loss; noncoherent MMSE interference suppression performance; noncoherent normalized least-mean-square algorithm; observation window; reference symbol; robust noncoherent receiver; AWGN; Adaptive algorithm; Detectors; Interference suppression; Laboratories; Multiaccess communication; Nonlinear filters; Power system modeling; Robustness; World Wide Web;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2001. ICC 2001. IEEE International Conference on

Print_ISBN

0-7803-7097-1

Type

conf

DOI

10.1109/ICC.2001.937001

Filename

937001