Despread-respread multi-target constant modulus array for CDMA systems

Author

Rong, Zhigang ; Petrus, Paul ; Rappaport, Theodore S. ; Reed, Jeffrey H.

Author_Institution

MPRG, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

1

Issue

4

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

114

Lastpage

116

Abstract

We apply the concept of the despread-respread (DR) algorithm to multi-target arrays for code-division multiple-access (CDMA) signals, the despread-respread algorithm exploits the knowledge of the pseudo-noise (PN) code used to generate the transmitted CDMA signal. We extend the DR algorithm to not only exploit the knowledge of the PN code but also to preserve the constant modulus property of the signal. This new algorithm is called the least squares despread respread multi-target constant modulus array (LS-DRMTCMA). LS-DRMTCMA performs better than the least squares despread respread multi-target array (LS-DTMTA), least squares multi-target constant modulus array (LS-MTCMA), and steepest descent multi-target decision directed array (SD-MTDDA).

Keywords

adaptive antenna arrays; array signal processing; code division multiple access; least squares approximations; pseudonoise codes; spread spectrum communication; CDMA signals; PN code; adaptive array; code-division multiple-access; despread-respread algorithm; least squares despread respread multi-target constant modulus array; pseudo-noise code; Adaptive arrays; Antenna arrays; Cost function; Digital signal processing; Least squares methods; Multiaccess communication; Signal generators; Signal processing;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.602601

Filename

602601