1) frequency utilize
频率利用率
1.
The characteristic, spectrum, frequency utilize and error performance of these technology were introduced mostly.
概述移动通信中常用的数字调制技术,主要介绍这些技术的特点、功率谱、频率利用率及误码率性能,并作了必要的比较,最后提及了这些技术的一些新进展。
2) band utilization rate
频带利用率
1.
The paper studies on the problem mainly about how to eliminate the intersymbol interference in frequency transmission system,including M-ary modulation system,and points out the condition of the transfer function for transmission system without intersymbol interference,the relation of highest code element rate and system bandwidth and the band utilization rate of the different modulation system.
主要针对频带传输系统包括多进制调制系统如何能消除码间干扰问题进行了分析,提出了无码间干扰传输系统的传输函数应满足的条件、最高码元传输速率与系统带宽之间的关系以及不同调制系统的频带利用率。
3) bandwidth efficiency
频带利用率
1.
Performance comparison of space time trellis codes and space time transmit diversity is carried out under the same bandwidth efficiency in this paper.
本文在相同频带利用率下将空时格码与空时发射分集的性能进行了比较 。
2.
Relevant error probability and bandwidth efficiency are also discussed.
在此基础上,以信号星座图为工具,构造出多种优良的调制方法,并分析了相应的差错性能和频带利用率。
3.
, number of the subcarriers) unchanged to increase the bandwidth efficiency, or keeping the bandwidth efficiency unchanged (ratio between CP(cy.
ca变以提高频带利用率,或者保持频带利用率(CP与数据有效传输时间之比)不变以改善系统对抗同步误差,即频率偏差的能力。
4) spectrum efficiency
频谱利用率
1.
Based on theoretical analysis, this paper proves that the use of irregular 19 groups of frequency reuse scheme can be used to raise the spectrum efficiency of mobile communication networks.
通过理论分析证明非规则１９组的频率复用方式可用于提高移动通信网络频谱利用率。
2.
TD-SCDMA is characterized by outstanding benefits such as high spectrum efficiency, high system capacity, low facility and network building costs, global roaming, best asymmetrical data service support, and acceptable terminal mobility, all of which comply with ITU requirements.
时分-同步码分多址(TD-SCDMA)具有频谱利用率高、系统容量大、系统设备成本竞争优势强、移动速度满足国际电信联盟(ITU)要求、网络建设费用低、适合移动互联网非对称数据业务应用和全球漫游等特点。
3.
To improve the spectrum efficiency has been an important issue to wireless communication recently.
提高频谱利用率是当前和今后无线通信的一个重要问题,多输入多输出(MIMO)和空时编码技术越来越引起人们的重视。
5) spectral efficiency
频带利用率
1.
Firstly,methods of biphase coded modulation with high spectral efficiency called Variable Phase Shift Keying(VPSK) and Very Minimum Shift Keying(VMSK),which are used in UNB,are introduced in this paper.
在分析超窄带通信中的关键技术一具有高频带利用率的双向编码调制方式:可变相移键控(VPSK),甚小频移键控(VMSK)的基础上重点讨论了1/2甚小频移键控(VMSK/2)调制方式的编解码原理,并给出了其频谱的数学表达式和计算机仿真频谱图。
6) spectrum utilization efficiency
频谱利用率
1.
A novel ultra-wideband (UWB) pulse design algorithm combining the methods of spectrum analysis and orthogonal basis synthesis in time domain is presented to improve the spectrum utilization efficiency and conform the federal communications commission (FCC) emission mask constraint.
从提高频谱利用率和满足FCC辐射掩模规定的角度出发,采用频域反推和时域正交综合相结合的设计方法,利用扁长椭球波函数(PSWF)来生成脉冲基。
2.
The pulse designed here not only was limited to time so as to reduce the multiple access interference but enhanced the spectrum utilization efficiency under the spectral mask constraint,which improved the transmission quality of a UWB system.
从最大化频谱利用率的角度提出了一种设计超宽带(UWB)脉冲的算法,此算法是通过对理想UWB脉冲进行加窗、卷积来设计UWB脉冲的。
3.
The simulation results indicate that collaborative spectrum sensing can improve the spectrum sensing performance significantly,combat the shadowing or fading effects and enhance the spectrum utilization efficiency.
最后对多用户协同频谱感知和单用户频谱感知的性能进行了仿真研究,结果表明多用户协同频谱感知可以明显提高频谱感知的性能,克服阴影/衰落作用的不利影响,提高频谱利用率。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条