To compensate the service providers who have paid billions of dollars to use spectrum and to satisfy secondary users' requirements in cognitive radios, a Non-cooperative Power Control Game and Pricing algorithm (N...To compensate the service providers who have paid billions of dollars to use spectrum and to satisfy secondary users' requirements in cognitive radios, a Non-cooperative Power Control Game and Pricing algorithm (NPGP) is proposed. Simulation results show that the proposed algorithm can regulate the secondary users' transmitter powers, optimally allocate radio resource and increase the total throughput effectively.展开更多
IEEE has set up in October 2004 the IEEE802.22 Working Group—Wireless Regional Area Network(WRAN)Task Force to work out air interface standard based on Cognitive Radio(CR)technologies.The standard includes Physical L...IEEE has set up in October 2004 the IEEE802.22 Working Group—Wireless Regional Area Network(WRAN)Task Force to work out air interface standard based on Cognitive Radio(CR)technologies.The standard includes Physical Layer(PHY)and Media Access Control(MAC),to use the already allocated fallow spectrums to broadcast TV in a non-interference way.The WRAN employs CR technologies to sense and estimate the television frequencies and use the technologies of dynamic spectrum management to find and then allocate idle spectrums.The CR technologies are representing one of the major trends for future wireless communications.This article on WRANs and CR technologies will be divided into two issues.In this issue,WRANs and IEEE 802.22,CR technologies are introduced.And the second part in the next issue will analyze the applications of CR technologies.展开更多
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 mod...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.展开更多
IEEE has set up in October 2004 the IEEE802.22 Working Group-Wireless Regional Area Network(WRAN)Task Force to work out air interface standard based on Cognitive Radio(CR)technologies.The standard includes Physical La...IEEE has set up in October 2004 the IEEE802.22 Working Group-Wireless Regional Area Network(WRAN)Task Force to work out air interface standard based on Cognitive Radio(CR)technologies.The standard includes Physical Layer(PHY)and Media Access Control(MAC),utilizig the vacant spectrum bands already allocated to broadcast TV without interference..The WRAN employs CR technologies to sense and estimate the television signals and use the technologies of dynamic spectrum management to find and then allocate vacant spectrums.The CR technologies are representing one of the major trends for future wireless communications.This article on WRANs and CR technologies will be divided into two issues.In this issue,WRANs and IEEE 802.22,CR technologies are introduced.And the second part in the next issue will analyze the applications of CR technologies.展开更多
基金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).
文摘To compensate the service providers who have paid billions of dollars to use spectrum and to satisfy secondary users' requirements in cognitive radios, a Non-cooperative Power Control Game and Pricing algorithm (NPGP) is proposed. Simulation results show that the proposed algorithm can regulate the secondary users' transmitter powers, optimally allocate radio resource and increase the total throughput effectively.
文摘IEEE has set up in October 2004 the IEEE802.22 Working Group—Wireless Regional Area Network(WRAN)Task Force to work out air interface standard based on Cognitive Radio(CR)technologies.The standard includes Physical Layer(PHY)and Media Access Control(MAC),to use the already allocated fallow spectrums to broadcast TV in a non-interference way.The WRAN employs CR technologies to sense and estimate the television frequencies and use the technologies of dynamic spectrum management to find and then allocate idle spectrums.The CR technologies are representing one of the major trends for future wireless communications.This article on WRANs and CR technologies will be divided into two issues.In this issue,WRANs and IEEE 802.22,CR technologies are introduced.And the second part in the next issue will analyze the applications of CR technologies.
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).
文摘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.
基金Key Project of Chinese Ministry of Education(No.206055)
文摘IEEE has set up in October 2004 the IEEE802.22 Working Group-Wireless Regional Area Network(WRAN)Task Force to work out air interface standard based on Cognitive Radio(CR)technologies.The standard includes Physical Layer(PHY)and Media Access Control(MAC),utilizig the vacant spectrum bands already allocated to broadcast TV without interference..The WRAN employs CR technologies to sense and estimate the television signals and use the technologies of dynamic spectrum management to find and then allocate vacant spectrums.The CR technologies are representing one of the major trends for future wireless communications.This article on WRANs and CR technologies will be divided into two issues.In this issue,WRANs and IEEE 802.22,CR technologies are introduced.And the second part in the next issue will analyze the applications of CR technologies.
