Performance of the MC-DS-CDMA systems with PCE and variable spreading factors

Authors:
Gh. Farrokhi;S. Zokaei;H. A. Rohi
Affiliations:
K.N.Toosi University of Technology, Tehran, Iran;K.N.Toosi University of Technology, Tehran, Iran;K.N.Toosi University of Technology, Tehran, Iran
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

Citing 4
Cited 0

Single and Multi-Carrier CDMA: Multi-User Detection, Space-Time Spreading, Synchronisation and Standards

Single and Multi-Carrier CDMA: Multi-User Detection, Space-Time Spreading, Synchronisation and Standards
Overview of multicarrier CDMA

IEEE Communications Magazine
Multicarrier DS-CDMA: a multiple access scheme for ubiquitous broadband wireless communications

IEEE Communications Magazine
On the performance of multicarrier DS-CDMA with imperfect power control and variable spreading factors

IEEE Journal on Selected Areas in Communications

Quantified Score

Hi-index	0.00

Visualization

Abstract

Multicarrier direct-sequence code-division multiple access (MC-DS-CDMA) becomes an attractive technique for the future fourth-generation (4G) wireless systems. It can flexibly adapt transmission rates by changing both time and frequency spreading factors and possesses many physical-layer advantages in dispersive fading channels. Power control errors (PCE) degrade the performance of the MC-DS-CDMA system. In this paper, we evaluate the impact of different detectors in receiver and the effect of various time and frequency spreading factors and the effect of PCE on the single rate and multirate MC-DS-CDMA system in a Rayleigh Fading Channel with perfect channel estimation. By simulation, we obtain some important insights into the performance of the MC-DS-CDMA system. These insights are according to the following subjects. First off all MRC detection method compared with MMSE and EGC methods results in higher performance in a high capacity system. Afterward we conclude that Increasing frequency-or time domain spreading gain can improve the performance of the MCDS- CDMA system, but the system becomes more sensitive to power control errors and SNR variations. More PCE can exacerbate the performance of the MC-DS-CDMA system. Performance variation in term of BER becomes more sensitive in larger frequency-domain diversity and time- domain spreading gain.