外差接收

探讨了四路平衡式外差接收方法，使其在激光测风雷达光频上具有的风向判断功能。

We discussed four-group balanced heterodyne reception method , achieved the function of wind direction judgment in light-frequency of doppler ladar .

CO2激光外差接收的实时强度成像

Real-time intensity imaging for CO_2 laser heterodyne receive

GaAs肖特基二极管外差接收系统用于托卡马克电子回旋辐射的诊断

The diagnosis of Tokamak electron cyclotron radiation by GaAs Schottky diode heterodyne receiver

该菱体较好地用于CO2激光外差接收系统中，其能量转换效率达到93%以上。

The rhomb has been used in the CO2 laser heterodyne detection system , and the transfer efficiency is more than 93 % .

HT－6B上的ECE外差接收系统

An ECE measurement system with heterodyne receiver on the HT-6B Tokamak

光外差接收系统中的最佳本振功率

Optimal Local Oscillator Power in Optical Heterodyne System

湍流大气中光外差接收中频信号电流几率分布特性

Characteristics of IF Signal Current Probability Distribution for Optical Heterodyne Receivers in the Turbulent Atmosphere

采用10.6μm零拍外差接收方案，进行了激光辐射空间相干性退化的检测。

The 10.6 μ m CO2 homodyne receiving has been adopted for detecting deterioration of the spatial ' coherence of laser radiation .

具体是采用波分复用来隔离传感光信号与通信光信号，同时应用光相干外差接收来分离传感与通信之间的电信号频谱。

Wavelength division multiplexing was adopted to isolate the sensing light and the communication light . The optical heterodyne detecting was used to vary the spectrum of sensing signal from the communication signal .

接收部分为了实现高灵敏度、大动态范围接收机的设计，采用了两级低噪放级联、超外差接收、自动增益设计的方法。

But to reach low noise and wide dynamic range , is used in the RF circuit the two-cascade technology : one for low noise amplifiers and the other for two automatic gain controls .

低功耗FSK超外差式接收电路设计

Low-Power FSK Superheterodyne Receiver Based

本文对合成孔径激光雷达（SyntheticApertureLadar，简称SAL）中光外差平衡接收技术进行了研究。

As the key techniques in Synthetic Aperture Ladar ( SAL ), balanced optical heterodyne receiver technology is studied in this paper .

利用超外差式接收和直接数字合成（DDS）技术设计了高频地波雷达频谱监测系统的前端电路。

The design of a frontend circuit in the shortwave noise spectrum monitoring system is made by utilizing superheterodyne reception and direct digtal synthesis techniques .

超外差调频接收技术在叶尖间隙测量中的应用

Application of superheterodyne FM reception in measurement of blade tip clearance

与偏振无关的相干光外差平衡接收技术研究

Study on Polarization Independent Heterodyne Balanced Receiver

现代通信系统中，通常采用超外差式接收方案，混频器成为不可缺少的关键部件。

The super-heterodyne receiver is always applied in modern communication system , so mixer becomes the key part .

射电频谱分析仪采用超外差的接收方式，为了获得较高的扫频速度，采用直接频率合成技术获得可控扫频频率源作为本振。

The radio spectrum analyzer adopts the superheterodyne receiving mode . To achieve higher frequency-scan speed , the direct frequency synthesis technique is utilized , and the obtained controllable frequency-scan frequency source is used as local oscillator .

在分析超外差FM中频接收拓扑结构的基础上，设计出一种用于FSK（移频键控）信号的单片FM中频接收电路系统。

Based on the discussion of the topological structure of a superheterodyne FM receiver , a one chip FM receiver for FSK ( Frequency Shift Keying ) signal has been designed .

本文对特种激光外差通信系统接收中频信号相位受大气湍流随机起伏进行了实验测试。

The phase fluctuations of receiving IF signal of special type laser heterodyne communication system are measured .

SAL发射线性调频的激光信号，通过光外差探测方式获得接收光波的相位信息。

SAL launches linear frequency modulation ( LFM ) laser signal and obtains received light phase information by detecting optical heterodyne .

最后简单讨论了激光外差接收机的最佳接收口径。

Lastly , the best receiving aperture of a laser heterodyne receiver is discussed briefly .

光前置放大器在强度调制&直接检测（IMDD）系统中的应用，使常规的IMDD系统灵敏度接近了同类外差接收机的指标，而在系统可靠性、稳定性和成本等方面则优于外差接收系统。

The application of optically pre-amplified receiver in conventional Intensive Modulation-Direct Detection ( IMDD ) systems makes its sensitivity close to the sensitivity of heterodyne detection systems .