共查询到16条相似文献,搜索用时 125 毫秒
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在实际TD-LTE-Advanced系统中,针对非理想SRS信道,结合SRS信道估计误差的理论,建立SRS信道估计误差的模型,深入研究SRS误差对MIMO的性能影响。仿真分析显示,存在SRS误差的实际信道对协作多点传输(CoMP)有较大影响,但是相对其他基于波束赋形的MIMO模式仍能保证较高的增益。文章的研究工作分析非理想信道估计对系统性能的影响,并评估非理想SRS信道下多种MIMO模式的系统性能。 相似文献
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为了获得高平均功率的皮秒宽谱段激光,同时 减小整个光学系统的体积,本文从理论和实验两方面研究了高功率皮秒激光泵浦受激拉曼 散射(SRS)振荡腔。 通过分析SRS过程中同时发生的物理过程,将高功率泵浦下的拉曼晶体内多种 非线性效应简化 为晶体在简单等效透镜下的SRS,并通过实验测量单通SRS光的发散角,计算得到了高 功率泵浦下的拉曼晶体等效透镜的曲率半径,在此基础上设计了稳定高效的SRS振荡腔,通 过对比实验验证了此拉曼振荡腔的高效性,实现了波段覆盖532~698nm、最高输出功率为1.32W的皮秒SRS同轴激光的输出。在相同波 段覆盖范围内,是已报道的最高平均输出功率。 相似文献
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利用波长变换技术来消除WDM光通信系统中的SRS串扰 总被引:1,自引:0,他引:1
文章主要介绍了光通信系统中波长变换技术的发展现状,从而引入它来消除波分复用系统中受激拉曼散射(SRS)的串话影响。文章首先建立一个用来消除SRS串扰的仿真模型,再利用频谱的对称反转分布技术来消除SRS串话,最后进行了maltlab仿真,结果表明这一途径是可行的。但是此次的仿真系统是在忽略色散的条件下,所以还需进一步的研究。 相似文献
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Spectral characteristics of stimulated Raman scattering (SRS) in optical fibers are examined in a regime (nanosecond pulses or longer) for which effects such a self-phase modulation, cross-phase modulation, and group velocity dispersion are negligible. An XeF excimer laser was used to pump a multimode fused silica UV optical fiber to observe SRS multiple-order Stokes generation. A theoretical model in which SRS is the only nonlinear effect induced was developed to simulate the SRS spectra of excimer laser pumped silica fibers. Good agreement has been achieved on spectral characteristics of SRS between the computer simulation and experimental results, which clarifies several puzzling features observed in experiment. The most important parameters to the evolution of SRS spectra in fibers were found to be the Raman gain curve, and the linewidth and temporal profile of the input pump 相似文献
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冲击响应谱试验参数的设置 总被引:1,自引:0,他引:1
与经典冲击相比,冲击响应谱试验可以更真实地模拟军用设备在使用和运输过程中所遇到的复杂冲击环境.文中介绍了冲击响应谱的基本概念,阐述了冲击响应谱试验参数的设置方法及同一参数不同设置对试验的影响.验证试验结果表明,按此方法进行试验参数设置可获得较高的冲击响应谱试验精度. 相似文献
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The UV excimer lasers ArF, KrCl, KrF, and XeCl were utilized to create new families of UV lines by multiple orders of broad-band nonresonant stimulated Raman scattering (SRS) in the media H2 , D2 , CH4 , and LN2 . Mixed-media and excited-state SRS were also studied. 相似文献
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The state-dependent rejection scheme (SRS) provides a common framework for analysing existing handoff schemes and for designing new ones easily. Designing new schemes is made simple by determining the appropriate set of state-dependent probabilities. The Markov analysis of SRS is simple and useful for drawing initial conclusions on handoff strategies. The analysis and simulations carried out here demonstrate the capability of SRS to adapt to different mobility and load scenarios and to achieve good performance while targeting quality of service performance metrics. 相似文献
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Statistical analysis on stimulated Raman crosstalk in dispersion-managed fiber links 总被引:1,自引:0,他引:1
Power impairments due to stimulated Raman scattering (SRS) in dispersion-managed (DM) fiber links are evaluated theoretically. We extend previous work on the statistical analysis of SRS crosstalk to the case of multiple fiber segments. Closed-form formulas are derived, and the applicable range is presented by comparison with simulation results. The SRS crosstalk in DM fiber links is evaluated using derived formulas, and the preferable configuration of DM fiber links for suppressing SRS crosstalk is discussed. We also evaluate the exact power penalty induced by the SRS crosstalk in consideration of the log-normal waveform distribution due to SRS and non-Gaussian noise and clarify the system bounds in some typical DM fiber links. The developed approach provides a design rule for DM fiber links from the viewpoint of SRS crosstalk suppression. 相似文献