O433.54 2003042455SIH<sub>4</sub>激光等离子体氢光谱线的加宽机制=Study of thebroadening mechanism of H spectral lines in SIH<sub>4</sub> laser plasma[刊,中]/张贵银（华北电力大学.河北,保定（07100...O433.54 2003042455SIH<sub>4</sub>激光等离子体氢光谱线的加宽机制=Study of thebroadening mechanism of H spectral lines in SIH<sub>4</sub> laser plasma[刊,中]/张贵银（华北电力大学.河北,保定（071003））,靳一东∥激光杂志.-2002,23（1）.-50-51用光学多道分析测量了SIH<sub>4</sub>激光等离子体内氢光谱线的线型,通过对氢谱线加宽机制的讨论,得到其主要加宽机制为Stark加宽的结论。利用理论线型和实验线型的拟合,测量了SIH<sub>4</sub>激光等离子体的两个主要参量-电子密度和等离子体温度,结果与已有报道一致。图3参7（李瑞琴）展开更多
In cognitive radio network(CRN), a secondary user(SU) may utilize the spectrum resource of the primary user(PU) and avoid causing harmful interference to the primary network(PN) via spectrum sensing. In the traditiona...In cognitive radio network(CRN), a secondary user(SU) may utilize the spectrum resource of the primary user(PU) and avoid causing harmful interference to the primary network(PN) via spectrum sensing. In the traditional time spectrum sensing, the SU cannot detect the PU's presence during its transmission, thus increasing interference to the PN. In this work, a novel weighed cooperative bandwidth spectrum sensing method is proposed, which allows multiple SUs to use part of the bandwidth to perform cooperative spectrum sensing throughout the whole frame in order to detect the PU's reappearance in time. The SU's spectrum efficiency is maximized by jointly optimizing sensing bandwidth proportion, number of cooperative SUs and detection probability, subject to the constraints on the SU's interference and the false alarm probability. Simulation results show significant decrease on the interference and improvement on the spectrum efficiency using the proposed weighed cooperative bandwidth spectrum sensing method.展开更多
文摘O433.54 2003042455SIH<sub>4</sub>激光等离子体氢光谱线的加宽机制=Study of thebroadening mechanism of H spectral lines in SIH<sub>4</sub> laser plasma[刊,中]/张贵银（华北电力大学.河北,保定（071003））,靳一东∥激光杂志.-2002,23（1）.-50-51用光学多道分析测量了SIH<sub>4</sub>激光等离子体内氢光谱线的线型,通过对氢谱线加宽机制的讨论,得到其主要加宽机制为Stark加宽的结论。利用理论线型和实验线型的拟合,测量了SIH<sub>4</sub>激光等离子体的两个主要参量-电子密度和等离子体温度,结果与已有报道一致。图3参7（李瑞琴）
基金Project(61471194)supported by the National Natural Science Foundation of ChinaProject(BK20140828)supported by the Natural Science Foundation of Jiangsu Province,ChinaProjects(NS2015088,DUT16RC(3)045)supported by the Fundamental Research Funds for the Central Universities,China
文摘In cognitive radio network(CRN), a secondary user(SU) may utilize the spectrum resource of the primary user(PU) and avoid causing harmful interference to the primary network(PN) via spectrum sensing. In the traditional time spectrum sensing, the SU cannot detect the PU's presence during its transmission, thus increasing interference to the PN. In this work, a novel weighed cooperative bandwidth spectrum sensing method is proposed, which allows multiple SUs to use part of the bandwidth to perform cooperative spectrum sensing throughout the whole frame in order to detect the PU's reappearance in time. The SU's spectrum efficiency is maximized by jointly optimizing sensing bandwidth proportion, number of cooperative SUs and detection probability, subject to the constraints on the SU's interference and the false alarm probability. Simulation results show significant decrease on the interference and improvement on the spectrum efficiency using the proposed weighed cooperative bandwidth spectrum sensing method.
