本文着重研究了降低OFDM系统峰均功率比的方法。
The methods to lower the peak-to-average power ratio (PAPR) of OFDM system are researched in the essay.
提出了一种新的降低正交频分复用系统峰均功率比的方法。
A new method is proposed to reduce the peak-to-average power ratio of orthogonal frequency division multiplexing system.
在研究用选择性映射降法降低OFDM系统峰均功率比的基础上，提出了用m序列对SLM方法进行改进。
The paper first introduces the selected mapping method for the reduction of the peak-to-average power ratio of OFDM signals, and a method for improving SLM using m-sequence is put forward.
部分传输序列(PTS)是一种复杂度较高的减小正交频分复用(OFDM)系统峰均功率比(PAPR)的方法。
Partial transmit sequences (PTS) is a method with high complexity to reduce the Peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) system.
结果：在考察了不同离子对试剂和离子强度等因素对色谱系统中系统峰的形状和保留值的影响及系统峰对被分析物色谱峰形的影响后，对原先的方法进行改进。
Results: After inspection the factors of different ion pair reagent and ionic strength which effect the system peak and the system peak effect analytic peak, the original method was improved.
把共振峰作为特征参数用于一个小词汇量的汉语语音识别系统中，识别正确率达到了98%。
The formant and corresponding bandwidth parameters result in a correct recognition rate of 98% in a small vocabulary mandarin speech recognition system.
调峰的参数界限是供暖系统装机容量选择的重要参数，关系到系统运行时的负荷分布与经济性。
The peak shaving parameter limit is important to the choice of heating system capability, and is relate to heat load distributing and economic question.
重点分析了间接式地热供热系统调峰负荷随环境温度的变化，以及所受末端散热器设计、地热水与循环水换热器设计运行参数的影响。
Emphasizes the variation of peak load regulating with ambient temperature, the design of terminal heat radiators, and the design operating parameters of geothermal heat exchangers in indirect systems.
多载波信号的峰值平均功率比远远大于单载波系统，而且峰平比随着子载波个数无限增长。
The ratio of peak and average power in multi carrier system is much larger than that in single carrier system, and may grow unboundedly as the number of subcarriers grows to infinity.
形成岩石全应力应变曲线的时间序列反映了岩石内部节理裂隙趋向贯通的演化进程，砂岩节理裂隙系统在峰前阶段处于不同程度的混沌状态。
Evolution of rock joints into transfixion is described by the time series from strain-stress curves, and the state of joint system in sandstone is chaotic before its ultimate state.
为了简单可靠地增加转子系统的稳定性、抑制转子的共振振峰，提出一种新型的被动式电磁阻尼器。
For simply and reliably improving the rotor's stability and suppressing the resonant vibration around the first critical speed, a new passive electromagnetic damper was proposed.
通过室内研究和评价，选择有机化学清洗液对峰15井地面集输系统进行了化学清洗，取得显著应用效果。
It makes pipeline plugging happened frequently in Feng-15 gas well that the result of variety plugging material and elemental sulfur deposit in the surface gathering system.
基于相变材料熔化和凝固过程的相变潜热储能系统适用于太阳能加热、电力的‘削峰填谷’、热能回收。
Latent heat storage system based on phase change materials' (PCMs) melting and freezing is particularly suitable for solar energy heating, peak-shift of electrical demand and heat recovery.
并对某2243个节点系统夏季峰荷运行方式下的3个双边合同进行了实例计算，验证了方法的可行性和有效性。
The computation results of the summer-peak base case of a practical 2243 nodes transmission system demonstrates that this method is feasible and effective.
该系统使用单束法能测定13个同位素峰。
This system can determine 13 isotopic peaks by single beam method.
合理的信道化码资源管理策略设计可以提高3g系统的吞吐量、降低用户的呼叫阻塞率和降低信号的峰平功率比。
Channelization code management can increase the throughput, decrease the blocking probability of call setup requests, and reduce the signal Peak to Average Power Ratio (PAPR) in 3g systems.
在体全息相关识别系统中，如何改善相关峰质量是提高识别率的关键问题。
The key point about increasing recognition accuracy is to improve the correlation peaks quality in the volume holographic correlation recognition system.
正交频分复用(OFDM)系统的一个主要缺点是峰均功率比(PAPR)过高。
One of the major drawbacks of the OFDM system is the high peak-to-average power ration (PAPR).
OFDM系统的一个主要缺陷就是峰平比过高引起的高功率放大器(HPA)的非线性失真。
The OFDM system has a major disadvantage that high peak to average power ratio (PAPR) can cause nonlinear distortion in the high power amplifier (HPA).
在三大标准中atsc为单载波传输系统，能较好支持固定接收，峰均值比较小。
In three standards, ATSC is the single carrier transmission system, it is easy to support the fixed receiving, its peak average value quite being small.
结合物经快速蛋白质液相层析系统用凝胶色谱柱纯化后，用SDS PAGE鉴定各收集峰。
Every collected peak was identified by SDS-PAGE after purified with gel chromatography by fast protein liquid chromatography system.
抽水蓄能电站是对电力系统进行调峰填谷和提高电力系统经济性、可靠性的有效手段。
Pumped storage plant is an effective measure to adjust peak, fill the valley and enhance efficiency and reliability for electrical power system.
重庆临峰山森林公园生态系统属于次生林系统，系统的抗害能力较弱。
Chongqing Linfeng mountain forest park ecosystem belongs to secondary forest, the anti-hazard ability of the system is weak.
研究双曲正切包装系统在前峰锯齿脉冲作用下的冲击响应。
The shock response of hyperbolic tangent system is investigated under the action of forward sawtooth pulse.
介绍了两段闭路磨矿工艺技术路线、设备选择以及在云峰分公司磷酸装置配套湿法磨矿系统上的应用效果。
Process and facility selection of two stage closed circuit grinding and its application in phosphoric acid facility matching wet-process grinding system were introduced.
介绍了直接式和间接式地热供热系统调峰负荷的理论计算方法。
Presents respectively the theoretical calculating methods of peak load regulating in direct and indirect geothermal district heating systems.
仿真结果表明，与削波技术和传统的压扩技术相比，门限压扩以较小的系统复杂度获得了峰均比性能的改善。
Simulation results show that compared with clipping and the traditional companding techniques, threshold-based companding scheme can effectively improve the performance of PAPR with low complexity.
用计数的方法解决脉冲幅度分析器系统的谱峰幅度损失问题，然后根据丢失脉冲的个数进行补偿是解决幅度分析系统中死时间问题的有效方法。
To record the lost pluses and make up the amounts of the lost pluses is an effective method to treat with dead time in signal peak analyzer system.
用计数的方法解决脉冲幅度分析器系统的谱峰幅度损失问题，然后根据丢失脉冲的个数进行补偿是解决幅度分析系统中死时间问题的有效方法。
To record the lost pluses and make up the amounts of the lost pluses is an effective method to treat with dead time in signal peak analyzer system.
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