Title :
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
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;
Conference_Titel :
Signal Processing Advances in Wireless Communications, First IEEE Signal Processing Workshop on
Conference_Location :
Paris, France
Print_ISBN :
0-7803-3944-4
DOI :
10.1109/SPAWC.1997.630358
