The ACPF-7002 FBAR filter reduces the noise in the Rx band being amplified by the transmit chain, enhancing receiver sensitivity. 该基金会-7002FBAR滤波器降低了在接收频带噪音被发送链,提高接收灵敏度扩增。
Noise Receiver Sensitivity on Cylindrical Transducer of Insulation Resistance Influence Modeling and Sensitivity Analysis of Coriolis Mass Flowmeter with Finite Element Method 绝缘电阻对圆柱型换能器噪声接收灵敏度影响研究科氏质量流量计的有限元建模及灵敏度分析
Firstly, the concepts of receiver sensitivity and system electrical level allowance in communication system are briefly introduced. 重点分析了接收机灵敏度和系统电平余量这两项指标。
The low noise amplifier ( LNA) can reduce the system noise and improve the receiver ′ s sensitivity, it is the key-part in the receive system. 低噪声放大器在接收系统中能降低系统的噪声和提高接收机灵敏度,是接收系统的关键部件。
NUMIS and NUMIS+ are instruments of high output power, high receiver sensitivity. They are controlled by PC and are the most advanced direct groundwater detection equipment. NUMIS和NUMIS+输出功率高,接收灵敏度高并由PC机控制,是当今世界上最先进的直接探测地下水设备。
The results of analysis and computation show that 2-3 dB improvement in receiver sensitivity over the conventional amplitude detection system can be achieved by the biphase coding and threshold-crossing detection system under similar operation conditions. 分析与计算实例显示,在相似的工作条件下,所建议的接收机的灵敏度可比惯常的接收机改善2~3dB。
Research on Digital Optical Receiver Sensitivity 数字光接收机灵敏度的研究
The Application of Virtual-instrument in the Radar Receiver Sensitivity Measurement 虚拟仪器在雷达接收机灵敏度测试中的应用
This system can calibrate a test system of GPS receiver by measuring RF hardware relatively and absolutely orientation information, and authentic CDMA mobile station GPS receiver sensitivity performance. 本文阐述了CDMA移动台GPS接收机测试系统相对位置定位和绝对位置定位的精确度进行校准,能够完成移动台GPS接收机灵敏度的认定工作。
The transmission systems based on phase modulation formats have higher receiver sensitivity and larger nonlinear tolerance than the transmission systems based on OOK modulation format. Therefore, the phase modulation formats are very suitable for the upgrade of the transmission systems. 与基于开关键控(OOK)调制格式的传输系统相比,基于相位调制格式的传输系统有较高的接收机灵敏度和较大的非线性容限。
This paper introduces the fundamental mechanism and devices of photodetector, finally indicates the components, SNR, receiver sensitivity and BER of the receiver. 介绍光探测器基本原理、器件和数字光接收机构成、信噪比和性能。
And ( 4) the inner adjustment of receiver sensitivity. 内部接收器的灵敏度校准。
There are two kinds of detection schemes: heterodyne and homodyne detection, they provide higher receiver sensitivity than direct detection. 接收端的检测方式有外差检测和零差检测两种,都比常规直接检测有较高的接收机灵敏度。
We have continuously measured the stability of the receiver sensitivity of the 711-radar ( made in china) for a Long time. And we have compared the results of the measurements obtained by using two different apparatuses-noise signal generator and standard signal generator. 我们对国产711&雷达接收机灵敏度的稳定性进行了长时间的连续测量,并将噪声信号发生器和标准信号发生器所得到的测量结果进行了比较。
Dependence of photodetector degradation on receiver sensitivity; 探测器退化和接收机灵敏度的关系;
Then discussed the deterioration of receiver's sensitivity caused by PMD and the effect of PMD on RF spectrum at the receiver; 随后研究了PMD引起的脉冲展宽对接收机灵敏度的恶化以及对接收信号频谱的影响,得出了差分群时延与RF谱分量的关系。
Then, to the receiver sensitivity test, for example, it focuses on the working principle and implementation of the testing module. 接下来,以接收器灵敏度测试为例重点介绍了测试模块的工作原理和实现。
Phase noise, especially the nonlinear phase noise is one of the main factors which cause the receiver sensitivity reduced for DPSK and DQPSK systems. 对于DPSK,DQPSK系统,相位噪声特别是非线性相位噪声是造成接收机灵敏度降低的主要因素之一。
The operating distance of a laser radar system is determined on pulse energy, pulse width, beam divergence angular, atmosphere attenuation, target reflection, receiver sensitivity and so on. 激光雷达系统的作用距离由下列因素决定:脉冲能量、脉冲宽度、光束发散角、大气衰减、目标反射率和接收机灵敏度等。
It includes mainly that jamming mode, receiver sensitivity and jamming power of experimental jamming source. 提出了伪码调相引信实验干扰源系统方案,包括干扰源系统的干扰样式、接收机灵敏度和干扰功率的大小。
The CDMA PON employs different spread codes to provide access service for different subscribers. The corresponding spread gain can effectively improve receiver sensitivity. CDMAPON利用不同的扩频码来实现用户多址接入,由扩频技术带来的扩频增益可有效改善接收机灵敏度。
To reduce noise figure and improve receiver sensitivity, the heterodyne receiver model have become more widely available in the communication system. The rejection to image frequency interference has become the last problem for a low-noise receiver. 为了降低系统噪声系数,提高系统接收灵敏度,超外差式的接收机模型在越来越多的通信系统中被广泛的使用,实现整机低噪声、抗干扰的最后难题就是对镜频干扰的抑制。
To verify the performance of the module, after repeated testing of high temperature and low temperature, the indicators include the light eye, extinction ratio, optical power, receiver sensitivity, and digital diagnostic monitoring parameters can all meet the design requirements. 为验证模块的性能,经过高低温的反复测试,光眼图、消光比、光功率、接收灵敏度和数字诊断的监控参数的各项指标等均能满足设计的要求。
40 Gb/ s simulation and 10 Gb/ s experiment are performed using tunable clock or data-related signal as the phase pre-modulating signal. The eye opening and receiver sensitivity are improved and the dispersion tolerance is doubled when the phase pre-modulation is imposed on NRZ signals. 10Gb/s实验和40Gb/s仿真结果表明,采用时钟信号和数据相关信号对非归零码进行可调节的相位预调制,可增加信号的眼图开启度和接收灵敏度,将系统的色散容限提高1倍左右。
According to Pager sensitivity testing and in shielded box the testing method of the radio fuse sensitivity test self-sensitivity of radio fuze circuit, finally obtains self-Gao-frequency receiver sensitivity results. 根据寻呼机灵敏度测试和屏蔽箱测试无线电引信灵敏度的方法,对自制的无线电引信电路进行灵敏度测试,最后得出自制髙频接收装置的灵敏度值。
Compared with P ( LN) ZT, the thickness vibration mode of 1-3 type piezoelectric composites is strengthened obviously, but electromechanical quality factor Q-m is reduced. All of these are in favor of increasing the emission efficiency and receiver sensitivity. 与纯P(LN)ZT压电陶瓷相比,1-3型聚合物/水泥基压电复合材料厚度方向振动增强,机械品质因数Qm明显降低,这有利于提高超声换能器的发射效率和接收灵敏度。
Due to the long distance and great signal loss between signals of deep space communication channel, it is necessary to increase the channel gain and receiver sensitivity of the system. 深空通信信道中各信号间的传输距离非常远,能量衰减严重,所以必须努力提高系统的信道增益和接收机的灵敏度。
With the addition of DPSK baseband signal, the anti-dispersion capability of uplink signal and baseband signal is enhanced, the downlink transmission performance and receiver sensitivity become better. Besides, the influence of modulator at the central station on the receiver sensitivity is reduced. 增加传输DPSK基带信号后,上行链路信号和DPSK基带信号的抗色散能力强,下行链路的传输性能和接收端的灵敏度变好,还使中心站调制器对系统接收端灵敏度的影响减少。
Using narrow instantaneous bandwidth to synthesize wide coherent processing bandwidth, stepped frequency continuous wave ( SFCW) radar is able to improve receiver sensitivity effectively and make it easier for implementation. SFCW雷达利用较小的瞬时带宽合成较大的工作带宽,能有效提高接收机灵敏度,降低系统实现难度。