GPS digitized intermediate frequency signal sampler was used to validate the algorithm of acquisition and tracking of software receiver.
采用GPS中频信号采样器采集实际GPS数据，对搜索和跟踪算法进行了验证。
The non-ideal characteristic of intermediate frequency signal is unfavorable for band-pass sampling and affects the performance of quadrature transform.
研究用一种中频采样和数字信号正交变换理论实现脉冲多普勒雷达信号正交采样的新技术。
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。
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。
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。
Narrow band intermediate frequency digital receiver has been widely used in radar EW reconnaissance. At present, the high speed signal processing is the key point of its researching.
窄带中频数字接收机在雷达对抗侦察中得到了广泛应用，其高速信号处理技术是目前研究的重点。
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)。
In the process of signal digital intermediate-frequency received, digital down convertion, frequency tracking of carrier and phase locked loop are the keys.
在信号的中频数字接收过程中，数字下变频、载波频率与相位跟踪是设计的关键所在。
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。
The experiment of the first intermediate frequency FM FDM video signal from Asia satellite l was demonstrated.
系统进行了以传输亚洲一号卫星信号地面接收站第一中频多路电视信号为目标的现场实验。
Each of them is composed of high frequency amplifier, intermediate frequency amplifier and sampling, digital phase uprightness intersector, DDS and the S band signal inspirator for the transmitter.
接收机的每个通道都由高频放大器、中频放大、中频采样、数字正交器组成，另外还有DDS信号产生和频率激励源用来形成雷达发射机所需的S波段脉冲调制激励信号。
According to GPS signal structure and modulation characteristics, a GPS intermediate frequency digital signal is simulated under the condition of noise environment.
根据GPS信号的结构和调制特点，加上环境噪声，模拟出GPS中频数字信号。
An adaptive stochastic resonance algorithm is proposed and used in detecting the fault signal of intermediate frequency power source. The result is preferable.
提出了一种随机共振自适应算法，并运用于中频电源的故障信号检测，取得了较好结果。
This paper discusses the despread of low signal to noise ratio of the direct sequence (DS) spread spectrum signals using intermediate-frequency recirculation summation loop (IFRSL).
本文讨论了用中频积累法实现低信噪比直接序列扩频信号的解扩。
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 output signal of the sensor is the sinusoidal signal with intermediate frequency. To sample and process this signal, a data collection circuit that centers on P89C51RD2 single chip is designed.
传感器输出的检测信号是中频的正弦电压信号，为采集和处理该信号，设计了以P89C51RD2单片机为核心的数据采集器电路。
The output signal of the sensor is the sinusoidal signal with intermediate frequency. To sample and process this signal, a data collection circuit that centers on P89C51RD2 single chip is designed.
传感器输出的检测信号是中频的正弦电压信号，为采集和处理该信号，设计了以P89C51RD2单片机为核心的数据采集器电路。
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