Ding Le, Yin Qin-ye, Deng Ke, Meng Yin-kuo. A Computationally Efficient Transmit Power and Bit Allocations Algorithm for Wireless OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(7): 1537-1541. doi: 10.3724/SP.J.1146.2005.01149
Citation:
Ding Le, Yin Qin-ye, Deng Ke, Meng Yin-kuo. A Computationally Efficient Transmit Power and Bit Allocations Algorithm for Wireless OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(7): 1537-1541. doi: 10.3724/SP.J.1146.2005.01149
Ding Le, Yin Qin-ye, Deng Ke, Meng Yin-kuo. A Computationally Efficient Transmit Power and Bit Allocations Algorithm for Wireless OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(7): 1537-1541. doi: 10.3724/SP.J.1146.2005.01149
Citation:
Ding Le, Yin Qin-ye, Deng Ke, Meng Yin-kuo. A Computationally Efficient Transmit Power and Bit Allocations Algorithm for Wireless OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(7): 1537-1541. doi: 10.3724/SP.J.1146.2005.01149
In this paper, a computationally efficient algorithm for transmit power and bit allocations in wireless OFDM communication system is proposed, the aim is to minimize total transmit power under the constraints of data rate and max Bit Error Rate (BER). By exploiting the relation between water-filling level and system data rate, the proposed algorithm finds out an iterative method of searching water-filling level without preset step and initial value, then allocates the final bits and power with a simplified Greedy algorithm in partial subcarriers. The proposed algorithm avoids the probolems of the convergency probobality, the preset initial valuse and the selecting of optimal step in traditional adaptive water-filling algorithm by combining the water-filling and the Greedy algorithms effectivly, and its computationally efficiency is high. Simulation results verify the performance of the proposed algorithm.
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