ADAPTIVE MODULATION AND POWER CONTROL FOR THROUGHPUT ENHANCEMENT IN COGNITIVE RADIOS  

作　　者：Cheng Shilun Yang Zhen Zhang Hui 

机构地区：[1]Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China [2]Image and Image Communication Lab of Jiangsu Province, Nanjing 210003, China

出　　处：《Journal of Electronics(China)》2008年第1期65-69,共5页电子科学学刊（英文版）

基　　金：Supported by National Natural Science Foundation of China (No.60772062);the Key Projects for Science and Technology of MOE (No.206055);the Key Basic Re-search Projects for the Natural Science of Jiangsu Colleges (No.06KJA51001).

摘　　要：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.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.

关 键 词：Cognitive radio Adaptive modulation CROSS-LAYER Power control 

分 类 号：TN929.5[电子电信—通信与信息系统]