Adaptive Modulation and Power Control for throughput enhancement in cognitive radios |
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Authors: | Cheng Shilun Yang Zhen Zhang Hui |
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Affiliation: | Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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Abstract: | To regulate the transmit-power and enhance the total throughput, a novel Transmit Power Control Game (TPCG) algorithm and an adaptive Modulation TPCG (M-TPCG) algorithm which combine bandwidth allocation, adaptive modulation and transmit-power control based on Space Time Block Coding (STBC) OFDM-CDMA system are designed and a cross-layer framework of database sharing is proposed. Simulation results show that the TPCG algorithm can regulate their transmitter powers and enhance the total throughput effectively, M-TPCG algorithm can achieve maximal system throughput. The performance of the cognitive radio system is improved obviously. |
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Keywords: | Cognitive radio Adaptive modulation Cross-layer Power control |
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