Transmission Power Control Techniques for the Reverse Link of OFDM-DS-CDMA System

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ISCC '99 Proceedings of the The Fourth IEEE Symposium on Computers and Communications
Year:
1999

Citing 0
Cited 2

Adaptive fuzzy genetic algorithm-based power and threshold SIR control for MC-CDMA systems

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Performance and capacity improvements of subchannel power-controlled MC-CDMA system under multipath channels

International Journal of Mobile Network Design and Innovation

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Abstract

In this paper, a method of Transmission Power Control(TPC) for Orthogonal Frequency Division Multiplexing Direct Sequence Code Division Multiple Access (OFDM-DS-CDMA),in order to compensate for power attenuation at each subcarrier, is proposed. Instead of assigning same power levels for all-subcarriers, different trasmission power levels are assigned to different subcarriers, according to the attenuation of the subcarriers. System performance, in terms of Bit Error Rate(BER), has been evaluated by Monte Carlo simulation. The simulation results presented significant improvement, the proposed system performed much better than the system without TPC. It is shown that the Each Carrier TPC performed better than All Carriers TPC, hence Each Carrier TPC is more suitable for OFDM-DS-CDMA system.