ID 原文 译文
7984 应用实例表明,所建模型运算简单、方便、实用,能为指挥员在战时科学使用装备保障平台提供决策依据。 Application examples show that the model operation is simple, convenient and practical, can provide scientific use of equipment support in wartime commander platform with decision-making basis.
7985 广义空频索引调制(generalized space and frequency index modulation,GSFIM)技术的提出显示了其相比传统多输入多输出正交频分复用技术更优的系统性能。 Generalized empty frequency modulation index (generalized space and frequency index modulation, GSFIM) technology is put forward according to the compared with the traditional multiple-input multiple-output orthogonal frequency division multiplexing technology better system performance.
7986 然而,GSFIM有着较复杂的系统结构以及高复杂度的检测器。 GSFIM, however, has a more complex system structure and high complexity of the detector.
7987 讨论一种特殊形式的空频索引调制技术,即基于频率正交幅度调制(frequency and quadrature amplitude modulation,FQAM)/频相移键控(frequency and phase shift keying,FPSK)的空间调制(spatial modulation,SM)技术,其大大简化了系统结构。 Discuss a kind of special form of space-frequency index modulation technique, which is based on frequency quadrature amplitude modulation (frequency and quadrature amplitude modulation, FQAM)/frequency phase shift keying (frequency and phase shift keying, FPSK) spatial modulation (spatial modulation, SM) technology, it greatly simplifies the system structure.
7988 为了进一步提升该系统的频谱效率,提出了结合非正交子载波的FQAM/FPSK-SM。 In order to further improve the system spectrum efficiency, put forward the combination of is a hand carrier FQAM/FPSK - SM.
7989 仿真结果表明,在不同的参数配置下,通过调整压缩系数,非正交FQAM/FPSK-SM系统不仅能够带来频谱效率的提升,而且能够在发送速率相同的前提下达到与正交系统基本相同的性能,提高了系统的单位带宽吞吐量。 Simulation results show that under different parameters configuration, by adjusting the compression coefficient of nonorthogonal FQAM/FPSK - SM system can not only promote the efficiency of frequency spectrum, and can achieve the sending rate under the premise of the same basic same with orthogonal systems performance, improve the unit bandwidth throughput of the system.
7990 在机动目标的检测中,目标的速度、加速度会产生距离徙动和多普勒徙动的现象,影响机动目标的积累与检测性能。 In maneuvering target detection, target speed and acceleration can produce distance migration and the phenomenon of doppler migration, accumulation and detection performance of maneuvering targets on the impact.
7991 针对上述问题,提出一种基于频率轴反转变换与广义变尺度傅里叶变换的机动目标检测快速非搜索算法。 Aiming at these problems, puts forward a kind of inversion based on the frequency axis transform and generalized variable dimension Fourier transform of maneuvering target detection fast search algorithm.
7992 首先在距离频域-方位时域利用频率轴反转变换校正距离徙动,回波信号变为线性调频信号; First from the frequency domain - bearing time domain inversion transformation range migration correction using frequency axis, echo signal into a linear frequency modulation signal.
7993 接着利用Wigner-Ville分布变换核与广义变尺度傅里叶变换对目标参数进行估计; Then using the Wigner Ville distribution transform nuclear and general variable-dimension Fourier transform of target parameter estimation;