The aim of this work is to research the six-port theoretical background, and design a Ka-band direct conversion receiver front-end based-on six-port.
基于六端口技术的直接变频接收机被证明是一种适用于可重构、重复编程、多频带、多标准的很有前途的接收机结构。
This direct conversion receiver can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering.
这种直接转换接收器能够免除进行中频(IF)滤波的需要。
The conversion loss and noise temperature of mixers is determined by changing the IF noise temperature so as to change the noise temperature of the receiver system.
混频器的变频损耗和噪声温度的测量可以用改变中频部分的噪声温度使接收机的系统噪声温度变化来加以确定。
Digital down - conversion (DDC) is an important technique of digitized radar receiver.
数字下变频技术是数字化雷达接收机的关键技术之一。
A novel contactless energy bi-directional push mode was developed to realize direct conversion between energy transmitter and receiver.
提出一种非接触电能双向推送模式，用于完成电能发射端与接收端的双向直接转换。
Digital down conversion plays a key role in the digitized and software-oriented process of the receiver system.
数字下变频在接收系统的数字化和软件化过程中起到了至关重要的作用。
Based on data rate conversion technology, wideband digital EW receiver is able to achieve high intercept probability, high sensibility and the ability of approximately real-time signal processing.
建立在数据率转换技术之上的宽带数字侦察接收机要求能够实现高截获概率、高灵敏度、近乎实时的信号处理能力。
The frequency-guided receiver requires target signal's carrier frequency, gained by frequency measurement, to induct data rate conversion.
引导式接收需要采用测频方法得到目标信号载频，由测频结果引导后续数字信号处理器降低数据率。
This paper analyzes the digital down conversion (DDC) of wideband reconnaissance receiver IF digital signal based on polyphase filtering.
分析了基于多相滤波结构的宽带侦察接收机中频数字信号下变频处理方法。
Means are then provided at an optical receiver to discover and lock onto floating wavelength grid of transmitted WDM signals and thereafter demultiplex the transmitted WDM signals for OE conversion.
然后，在光接收器处提供一些装置，以便发现并锁定发送过来的WDM信号的漂移波长栅格，这之后对发送过来的WDM信号进行多路分配以便于OE转换。
A frequency guiding digital receiver is given. The key technology, fast frequency estimation and high effectual data rate conversion, is introduced briefly.
给出了一种频率引导式的数字接收机方案，简要介绍这种接收机的关键技术——快速、高精度频率估计以及高效的数据率转换。
Then the receiver structure and mathematical model, signal collection chip and fpga-main implementation device of digital down conversion are introduced.
接着介绍了接收机的构成和数学模型、采用的信号采集芯片及实现数字化下变频的主要器件—FPGA。
The simulation results show that the designed PLL frequency synthesizer meets the design specification and it can be used in the integrated wideband if with double conversion wireless RF receiver.
仿真结果表明，该锁相环频率综合器达到了设计指标，可以应用于两次变频的“宽带中频”集成接收机。
Based on a direct-conversion architecture, the receiver integrates LNA, I/Q mixer, DC-offset removal filter, baseband amplifier and channel-select filters on a single chip.
基于直接下变频的系统架构，接收机集成了低噪声放大器、I/Q下变频器、去直流偏移滤波器、基带放大器和信道选择滤波器。
Based on a direct-conversion architecture, the receiver integrates LNA, I/Q mixer, DC-offset removal filter, baseband amplifier and channel-select filters on a single chip.
基于直接下变频的系统架构，接收机集成了低噪声放大器、I/Q下变频器、去直流偏移滤波器、基带放大器和信道选择滤波器。
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