Conventional dual up-conversion transmitter usually employs an intermediate frequency (IF) mixer and a radio frequency (RF) mixer to convert baseband user signal to IF and RF in sequence.
传统双上变频发射器通常采用中频(IF)混合器和射频(RF)混合器将基带用户信号依次转换成IF和RF。
Intermediate frequency (IF) filter and compression filter are designed.
实现了中频滤波器和压缩滤波器的设计。
In order to decrease the mirror frequency interference, cross interference and inter-modulation interference, double IF (Intermediate frequency) is adopted in the receiver.
为了降低镜频干扰、交调和互调干扰，接收机采用了双中频方案。
The radio frequency (RF) circuits of the transceiver and the intermediate frequency (IF) signal processing methods of the LAU are all given a more detailed description in this paper.
文章对收发系统的射频电路及本地天线单元的中频信号处理方法作了较为详细的介绍。
A bipolar logarithmic intermediate-frequency (if) amplifier with received signal strength indicator (RSSI) circuit for ASK Receiver is presented.
一种适用于ask接收器中的双极型对数中频放大器，具有接收信号强度指示的功能(RSSI)。
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 system adopts superheterodyne architecture. It consists of intermediate frequency (IF) band and radio frequency (RF) band hardware design.
该收发信机采用超外差结构，主要包括中频部分的硬件设计以及射频部分的硬件设计。
If knee level of drug import group im proved significantly after treatment, better than the intermediate frequency electrotherapy group.
中频药物导入组膝关节活动度治疗后有明显改善，优于中频电疗组。
Chapter 2 sets forth the structure of IF (Intermediate Frequency) digital Software Radio, the critical theory of Software Radio and the signal processing technique about it.
第二章介绍了中频数字化软件无线电的结构，并阐述了软件无线电的关键理论和软件无线电中的信号处理技术。
This paper is mainly about design and implementation of digital intermediate frequency (IF) transceiver combined with the software defined radios (SDR) technology based on FPGA.
本课题将以FPGA为硬件载体，结合软件无线电技术设计实现数字中频扩频收发系统。
Always some PAPR reduction schemes are used on baseband, but if baseband signal combined to Intermediate Frequency (if), the peak may recur.
为了降低峰均比常用的是基带削峰的方法，而基带信号合成为中频信号后容易产生峰值再生的问题。
Always some PAPR reduction schemes are used on baseband, but if baseband signal combined to Intermediate Frequency (if), the peak may recur.
为了降低峰均比常用的是基带削峰的方法，而基带信号合成为中频信号后容易产生峰值再生的问题。
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