A New Approach for Increasing Energy Efficiency of OFDM-CDMA System with Pilot Tones
نویسندگان
چکیده
In this paper, incorporation of MISO concept is proposed as a solution for increasing energy efficiency and improving BER performance of OFDMCDMA downlink system with pilot tone and threshold detection combining (optimum TDC). The new presented system with MISO included uses spacetime block coding applied to two, three and four transmit antennas. BER (Bit Error Rate) performance in the case of Ricean frequency selective fading is evaluated for the original system as well as for the one with MISO included. For that reason an adequate simulation model is developed. The results show that the proposed system significantly outperforms the OFDMCDMA downlink system with pilot tone and optimum TDC. The proposed system provides greater energy efficiency and lower BER in comparison with the original system.
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