ID 原文 译文
53477 针对非整数倍路径时延环境中路径能量泄露导致路径总数增多且难以确定的问题，给出了一种基于噪声方差的终止准则，其中噪声方差可以通过估计获得。 Multipath energy leakage due to the non-integer multipath delay will always lead to multipath number increasing and bring difficulties to detection. In this paper, we investigate the termination criterion of the OMP algorithm and design one based on noise variance which can be obtained by estimation.
53478 这种基于噪声方差的 OMP 算法（NV-OMP）能够检测信道路径个数，并获得有效的信道估计。 The OMP algorithm based on noise variance (NV-OMP) can jointly detect the channel multipath number and estimate the channel state information.
53479 仿真结果表明，与基于稀疏度已知的 OMP 算法相比，NV-OMP 算法在非整数倍路径时延环境下的信道估计性能更加鲁棒，因而更适合于实际应用。 The stimulation results show that, compared with the OMP algorithm based on known sparsity, the NV-OMP algorithm is more robust in non-integer multipath delay environment, and hence is more suitable for practical applications.
53480 文章同时仿真分析了噪声方差对 NV-OMP 算法性能的影响。 Moreover, the influence of noise variance estimation on the performance of the new OMP algorithm is also presented.
53481 LED光源作为新型绿色环保光源，具有寿命长，发光效率高，高亮度以及工作电压低等优点。 LED light source as a new, green and environmental friendly light, has advantages of long life, high luminous efficiency, high brightness and low operating voltage.
53482 基于LED驱动电路的过温保护以及降低功耗要求，本文设计了一种用正温敏电阻来自动调节LED驱动电流以及降低采样电阻功耗的LED驱动电路， In view of the requirements of over- temperature protection and reduce power consumption about LED drive circuits, this paper introduces a LED driver circuit for temperature-sensitive resistor to automatically adjust the LED drive current and reduce the sampling resistor power.
53483 与常用的LED驱动电路相比，其优点在于：在温度达到保护点时，驱动电流不是直接降为零，而是在不被人眼明显发觉光变的前提下，LED驱动电流随系统温度的增加而适当的降低，因此，更适应照明等领域。 Compared with the commonly used LED, this circuit has an advantage over the others. When the temperature comes to protection point, the LED drive current is not directly reduced to zero, but be decreased softly with the increases of the system temperature, in the premise of changes in flux are not obviously detected by human eyes.
53484 本文所选取的LED驱动电流为ILED=350mA，LED灯阵列由M×N矩阵形式组成。 Therefore, it is more suitable for lighting and other fields. This paper select 350 mA LED drive current and the LED light array is composed of M×N matrix.
53485 超宽带信号由于功率谱密度较低和传输多径复杂，准确的信道估计十分重要。 Due to the low power spectrum density and complicated transfer multi-path of Ultra-Wideband(UWB) signal, it is important to do channel estimation accurately.
53486 考虑其过高带宽带来的采样难度较高的问题，压缩感知理论提供了一种可行的低速采样方法。 But it's difficult to sample it directly as its wider band width. However, compressed sensing(CS) provides a feasible way with lower sampling speed.