Low complexity real-time power allocation algorithm to improve BER performance in cooperative communication systems

Cooperative diversity is a new technology to improve BER performance in wireless communication. A new power allocation algorithm to improve BER performance in cellular uplink has been proposed in this paper. The other power allocation schemes were for the purpose of maximizing the channel capacity or minimizing the outage probability. Different from these schemes, the proposed algorithm aims at minimizing BER of the systems under the constraint of total transmission power. Besides this characteristic, the proposed algorithm can realize a low complexity real-time power allocation according to the fluctuation of channels. The results of simulation show that the proposed algorithm can decrease BER of the systems effectively.