Adaptive LMS filter receivers for a convolutionally coded CDMA system

Author

Kazi, Sabera ; Lucke, Lori ; Nelson, Laurie

Author_Institution

Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA

fYear

1997

fDate

16-18 April 1997

Firstpage

257

Lastpage

260

Abstract

We demonstrate that the use of convolutional codes with adaptive filter receivers can significantly improve the bit error rate of a code division multiple access (CDMA) system. A system model is proposed to allow the study of convolutional coding in a CDMA system with both additive white Gaussian noise (AWGN) and a Rayleigh fading channel. Coding is shown to provide improved response to both the near-far problem and the multipath problem. We show that one can achieve coding gain of 2 dB in AWGN channel and 2.5 dB in Rayleigh fading channel.

Keywords

Gaussian channels; Rayleigh channels; adaptive filters; code division multiple access; coding errors; convolutional codes; error statistics; fading; filtering theory; least mean squares methods; multipath channels; pseudonoise codes; radio receivers; spread spectrum communication; AWGN channel; PN sequence; Rayleigh fading channel; adaptive LMS filter receivers; additive white Gaussian noise; bit error rate; code division multiple access; coding gain; convolutionally coded CDMA system; multipath problem; near-far problem; performance analysis; spread spectrum communication; AWGN; Adaptive filters; Bit error rate; Convolution; Convolutional codes; Fading; Finite impulse response filter; Least squares approximation; Multiaccess communication; RAKE receivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Advances in Wireless Communications, First IEEE Signal Processing Workshop on

Conference_Location

Paris, France

Print_ISBN

0-7803-3944-4

Type

conf

DOI

10.1109/SPAWC.1997.630358

Filename

630358