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- Realization of Digital Modulation Based on Direct Digital Frequency Synthesis 基于直接数字频率合成技术的数字调制实现
- Realization of Digital Modulation Based on Direct Digital Synthesis (DDS) 基于DDS技术的多种数字调制的实现
- direct digital modulation 直接数字调制
- Good knowledge in RF, Digital TV and digital modulation techniques. 精通射频,数字电视和数字调制技术;
- The DDS, Direct Digital Synthesizer, which is implemented by a unique FPGA IC, can provide the stable sine signal with digital AM, FM, ASK, PSK modulation. 仅用单片FPGA就实现了直接数字频率合成技术(DDS),产生稳幅正弦波,并在数字域实现了AM、FM、ASK、PSK等四类调制信号。
- Based on Software Defined Radio (SDR) technology, the architecture uses a Direct Digital frequency Synthesizer (DDS) to implement demodulation and modulation of Frequency Hopping (FH) signal. 实验台的构成遵循了软件定义无线电思想,采用了数字直接频率合成器来实现跳频信号的调制和解调。
- This paper introduces a DDC(Direct Digital Control) temperature system. 介绍一种 DDC(直接数字控制 )温度系统。
- Objective: To evaluate the value of direct digital panoramic sialography. 摘要目的:评价直接数字曲面体层摄影在涎腺造影中的临床价值。
- Objective:To evaluate the value of direct digital panoramic sialogra phy. 目的评价直接数字曲面体层摄影在涎腺造影中的临床价值。
- QPSK as an advanced digital modulation technique is fit for the digital satellite communication system well. QPSK作为一种先进的数字调制方式,特别适用于数字卫星通信系统。
- This paper proposed a digital modulation signal identification method using the HHT and SVM methods. 提出了一种基于HHT和支持向量机的实际数字调制信号识别算法。
- With the high development of VLSI technology,all digital modulation must be ultimately the goal of HDTV. 随着VLSI技术的高速发展,全数字化调制将是HDTV的最终发展方向。
- In automatic classification of digital modulation signal,computing envelope variance after difference has important meaning to distinguish PSK and FSK signal. 在数字信号的自动调制方式识别中,差分后求包络方差对于区分FSK、PSK信号具有十分重要的意义。
- Namely, we use digital modulation to control the shooting-system, which can send out a series of light pulses loading information. 即采用数字脉冲编码方式对控制系统信号进行调制,将信息加载在光脉冲序列上发射出去。
- A new method LFM in direct digital frequency synthesizing ( DDS) based on CORDIC algorithm is introduced in this paper. 本文介绍了一种应用CORDIC算法的线性调频直接数字合成(DDS)的实现方法。
- Orthognal Frequency Division Multiplexing (OFDM) is a multi-carrier digital modulation technique for broad-band wireless communication. 正交频分复用(OFDM)是一种多载波数字调制技术。
- Objective To research the application value of direct digital radiograph (DDR) in nasal bone imaging. 目的探讨直接数字化X线摄影(direct digitized radiography,DDR)在鼻骨摄影中的应用价值。
- As an effective digital modulation scheme, OFDM is widely used in wideband digital communication systems, such as DVB-T. OFDM是一种高效的数据调制方式,被广泛地应用于宽带数字通信领域。
- This paper discusses the direct digital control (DDC) in the air-handing unit of air-conditioning system. 本文将讨论空调系统中空气处理机组的直接数字控制(DDC)设计。
- Direct Digital Frequency Synthesis(DDS) technique is introduced and its spurious error is mainly studied. 介绍了直接数字频率合成技术以及分析其杂散误差,对相位截断误差和幅度量化误差进行了傅立叶级数分析研究。