if ( intermediate frequency )中文什么意思

例句与用法

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1. First , the structure of sdr and the physical - channel of td - scdma are expounded , then software and hardware models of the terminal receiver , which use the sdr structure of wideband and bandpass sampling in if ( intermediate frequency ) , are put forward
   首先对软件无线电的组成结构和td - scdma物理信道进行了阐述，在此基础上提出了基于宽带中频带通采样软件无线电结构的td - scdma终端接收机的软硬件模块设计方案。
2. The purpose of this thesis is to work deeply over the sr theory , understand the key thinking of sr , cognize the key technologies of sr , and design the if ( intermediate frequency ) sr receiver subsystem basing on the sr theory
   本文的研究目的是深刻研究软件无线电基础理论，领会软件无线电关键思想，认识软件无线电中的关键技术，掌握软件无线电的发展现状和应用前景，设计基于软件无线电思想的中频软件无线电接收机子系统。
3. The results of computer simulation and fpga simulation indicate that the technique is feasible and the experiment ' s results show that the performance of the system is excellent . in this paper , it summarize the basic principles of the if ( intermediate frequency ) digitization technology and detail the design and fpga realization of the digital if receiver system
   在具体实现中，提出了一种基于多相滤波结构来进行抽取滤波的中频接收机方案，通过计算机仿真，证明了它的可行性，并围绕此方案完成了数字下变频硬件系统的设计和调试工作。
4. On the basis of this theory , the applications of the sdr structure of wideband and bandpass sampling in if ( intermediate frequency ) in flight test were offered : increase the sampling in if ( intermediate frequency ) in flight test were offered : increase the capacity of the transmitter and the terminal receiver channels without changing the apparatus of original system and on the conditions of obeying the standard remote sensing
   首先对软件无线电的组成结构和飞行测试中实际使用的信道进行了阐述，在此基础上提出了基于宽带中频带通采样软件无线电结构在飞行遥测测试中的应用，在不改变原系统设备的情况下，在遵守遥测标准的前提下，提出增加机载发射机和接收机信道容量的设计方案。
5. In recent years , with the rapid development of the millimeter - wave radar technology and the demand of the safety , anticollision radar system is being studied and used widely . the if ( intermediate frequency ) circuit and the digital signal processing are two important parts of it
   随着毫米波雷达技术的日益成熟和人们对安全性的迫切需要，近年来，防撞雷达系统得到了深入研究和广泛应用，如自动巡航控制、碰撞报警和防碰撞系统以及有待发展的雷达成像和汽车的自动驾驶系统等。