Multicode CDMA downlink in shadowed multipath fading

Author

Bircan, Anil ; Sunay, M.O. ; Akansu, Ali N.

Author_Institution

Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA

Volume

2

fYear

2001

fDate

2001

Firstpage

462

Abstract

The performance characteristics of a multicode CDMA downlink with systematic convolutional (turbo) coding are obtained under a shadowed multipath fading mobile channel. Two different iterative decoding methods are compared in two different synchronous downlink schemes operating under given channel conditions with the same transmission bandwidth as in IS-95. Multicode CDMA with logMAP decoding is observed to provide better QoS with lower bit and frame error rates, reasonable complexity and shorter decoding delay compared to DS-CDMA downlink with single code pair assigned to each user

Keywords

code division multiple access; convolutional codes; delays; error statistics; fading channels; iterative decoding; land mobile radio; multipath channels; multiuser channels; quality of service; radio links; spread spectrum communication; turbo codes; BER; DS-CDMA; DS-CDMA downlink; IS-95; QoS; bit error rate; channel conditions; decoding delay; frame error rate; iterative decoding methods; logMAP decoding; multicode CDMA downlink; performance characteristics; shadowed multipath fading mobile channel; single code pair; spread spectrum radio interface; synchronous downlink; systematic convolutional coding; transmission bandwidth; turbo coding; Bandwidth; Convolutional codes; Digital modulation; Downlink; Fading; Frequency; Iterative decoding; Modulation coding; Multiaccess communication; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2001. ICC 2001. IEEE International Conference on

Conference_Location

Helsinki

Print_ISBN

0-7803-7097-1

Type

conf

DOI

10.1109/ICC.2001.936983

Filename

936983