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- service band signal 公务波段信号
- Such system is used to digitize high-speed, wide band signal. 该系统适用于对高速、宽带的瞬态信号进行数字化处理。
- This paper designed a programmable base band signal generator of variable bandwidth based on the combination of FPGA and DSS using large-seale integrated circuits. 利用大规模的集成电路技术，基于FPGA和DSS相结合，设计一种带宽可转换的，具有可编程的基带信号产生器。
- In this paper, by using DFT filter bank and ZFFT, we present an algorithm of spectrum analysis for the wide band signal. 本文利用DFT滤波器组、FFT,提出了一种宽带信号的实时谱分析方法。
- The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. 调幅讯号之频谱为一半强度基频讯号之频谱分别正负位移一射频或载波之频率。
- After the PPM modulation ultra-wide band signal after the Gauss white noise channel system simulation, and give the time domain and the frequency range chart! 经PPM调制的超宽带信号经高斯白噪声信道的系统仿真,给出了时域和频域图
- A model of DPSK modulation and demodulation system with base band signal are simulated on the basis of a FPGA development platform Quartus II 3.0 developed by Altera. 用Altera公司的FPGA开发平台QuartusII3.;0实现了一个对基带信号的DPSK调制解调系统模型的仿真。
- SPI register configuration platform achieve RS232 interface for data transmission equipment to the SPI bus to visit and control register of the base band signal processor. SPI寄存器配置平台实现了RS232接口设备到SPI总线的数据传输,从而完成对OFDM基带信号处理器中状态寄存器的访问与控制。
- The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R.F. frequency. 调幅讯号之频谱为一半强度基频讯号之频谱分别正负位移一射频或载波之频率。
- This work deals with the fundamentals of basic frequency band signal transmission sys-tem for well logging and analyzes the bipolar return-to-zero system and Manchester trans-mission system for well logging in detail. 本文介绍了基带传输系统的原理,并较详细地分析了用于测井的双流归零制基带传输系统和曼彻斯特传输系统。
- A 10% service charge is added on to the bill. 帐单上包括了百分之十的服务费。
- The typewriter is at your service. 这台打字机随便你使用。
- According to the trend and request of software radio, the paper introduces the effective technique of increasing frequency-bandwidth efficiency, reduces or eliminates ISI based on band signal disposing. 根据软件无线电发展的方向和要求,介绍了通过对基带信号处理来提高频带效率,减少或消除无符号码间干扰(insigninterferer,ISI)的有效方法;
- In this example, cosine of uniform random matrix multiplied by a triangular time varying standard deviation as noise, and Sinc pulse time varying as a base band signal are summed to form a PM signal. 本例以均匀随机变数矩阵之馀弦乘以标准差为三角波时变代表杂讯，及时变滤波函数脉波代表基频讯号，合成基频讯号及杂讯和之相位调变讯号。
- In this example, normal random matrix multiplied by a rectangular time varying standard deviation as noise, and rectangular time varying as a base band signal are summed to form an AM signal. 本例以常态随机变数矩阵乘以标准差为方波时变代表杂讯，及时变方脉波代表基频讯号，合成基频讯号及杂讯和之调幅讯号。
- In indoor environments, ultra-wide band signals suffer from dense multipath propagation and severe time dispersion. 超宽带信号在室内环境中将经历密集多径传播,产生严重的时间弥敞。
- A new bus line has been brought into service. 开辟了一条新的公共汽车线。
- Its slow service gave the restaurant a bad name. 这家餐馆因缺乏效率的服务搞得名声很坏。
- He filed for a civil service job. 他申请公务员的工作。
- He paid only lip service to the dictator. 他只以空洞的应酬话对付那个独裁者。
