High-performance MC-CDMA via carrier interferometry codes

Author

Natarajan, Balasubramaniam ; Nassar, Carl R. ; Shattil, Steve ; Michelini, Marco ; Wu, Zhiqiang

Author_Institution

Dept. of Electr. & Comput. Eng., Colorado State Univ., Fort Collins, CO, USA

Volume

50

Issue

6

fYear

2001

fDate

11/1/2001 12:00:00 AM

Firstpage

1344

Lastpage

1353

Abstract

This paper introduces the principles of interferometry to multicarrier code division multiple access (MC-CDMA). Specifically, we propose the use of MC-CDMA with novel carrier interferometry (CI) complex spreading codes. The CI/MC-CDMA method, applied to mobile wireless communication systems, offers enhanced performance and flexibility relative to MC-CDMA with conventional spreading codes. Specifically, assuming a frequency selective Rayleigh-fading channel, CI/MC-CDMAs performance matches that of orthogonal MC-CDMA using Hadamard-Walsh codes up to the MC-CDMA N user limit; and, CI/MC-CDMA provides the added flexibility of going beyond N users, adding up to N-1 additional users with pseudo orthogonal positioning. When compared to MC-CDMA schemes capable of supporting greater than N users, CI/MC-CDMAs performance exceeds that of MC-CDMA. Additionally, this new system is analyzed in the presence of phase jitters and frequency offsets and is shown to be robust to both cases

Keywords

Rayleigh channels; code division multiple access; jitter; land mobile radio; multipath channels; multiuser channels; radiowave interferometry; spread spectrum communication; CI/MC-CDMA method; Hadamard-Walsh codes; MC-CDMA; carrier interferometry codes; frequency offsets; frequency selective Rayleigh-fading channel; mobile communication system; mobile wireless communication systems; multicarrier code division multiple access; orthogonal MC-CDMA; phase jitter; pseudo orthogonal positioning; spreading codes; Fading; Frequency diversity; Interference; Interferometry; Multiaccess communication; Multicarrier code division multiple access; Multipath channels; RAKE receivers; Signal resolution; Wireless communication;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.966567

Filename

966567