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*紅外測試程序，用單片機通過發射管發射38K的調製頻率碼，由一體化接收並解碼由發光管顯示。
*正常情況下，由於反射和高靈敏度接收，LED4（P1.3)一直閃爍，可以用黑色紙片完全遮擋接收頭使
*之不能接收到發射管的信號，這是LED4熄滅。說明功能性正常-* Infrared testing procedures, MCU through the launch tube launch 38K code modulation frequency is received and decod
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Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation method with the initial idea to overcome multipath fading in a wireless environment. Multipath effect causes an unacceptable symbol in multiple copies but with a different
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本文介绍了一种控制对象以中小型UPS为模型的、基于TMS320F240的数字化控制平台的样机实验系统。经对比系统采用了单极性调制的SPWM方式，并根据核心处理芯片的各类资源给出了一套具体的软硬件数字化实现方案。系统硬件部分主要包括输出电压、输出电流、市电频率/相位等各类信号的采集和处理，以及输出PWM信号的隔离、驱动等。系统软件部分则包括UPS各种系统功能的实现，其中主要研究了软件锁相环(市电跟踪)、有效值调节、各类保护、PWM波的生成、闭环控制等的实现。-This article descri
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The demand of high data rate services has been increasing very rapidly and there
is no slowdown in sight. We know that the data transmission includes both wired
and wireless medium. Often, these services require very reliable data transmission
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0下载：
The demand of high data rate services has been increasing very rapidly and there
is no slowdown in sight. We know that the data transmission includes both wired
and wireless medium. Often, these services require very reliable data transmission
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0下载：
The demand of high data rate services has been increasing very rapidly and there
is no slowdown in sight. We know that the data transmission includes both wired
and wireless medium. Often, these services require very reliable data transmission
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0下载：
The demand of high data rate services has been increasing very rapidly and there
is no slowdown in sight. We know that the data transmission includes both wired
and wireless medium. Often, these services require very reliable data transmission
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Orthogonal Frequency Division Multiplex or OFDM is a modulation format that is finding increasing levels of use in today s radio communications scene. OFDM has been adopted in the Wi-Fi arena where the 802.11a standard uses it to provide data rates u
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BPSK,DPSK调制与解调，分别采用不同的载波频率进行调制观察载波频率对解调的影响-BPSK, DPSK modulation and demodulation, respectively, using a different carrier frequency of modulation observed carrier frequency of the demodulated
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Orthogonal Frequency Division Multiplex or OFDM is a modulation format that is finding increasing levels of use in today s radio communications scene. OFDM has been adopted in the Wi-Fi arena where the 802.11a standard uses it to provide data rates u
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快跳频系统， 数据采用MFSK调制 ，调频程序-Fast frequency hopping systems, data MFSK modulation, FM program
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信号幅度调制的方法；用时域和频域的方式表示幅度调制的结果。
-Signal amplitude modulation method time-domain and frequency domain representation of amplitude modulation of the results.
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采用MFSK调制的快速跳频通信系统，分析了各个阶段的频谱图-Using MFSK modulation of fast frequency hopping
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In telecommunications, direct-sequence spread spectrum (DSSS) is a modulation technique. As with other spread spectrum technologies, the transmitted signal takes up more bandwidth than the information signal that modulates the carrier or broadcast fr
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This example of AC-DC-AC converter illustrates use of Universal Bridge, Multimeter, and Powergui blocks, as well as discrete control blocks of the Extras library.-A 60 Hz, voltage source feeds a 50 Hz, 50 kW load through an AC-DC-AC converter. The 60
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载频为10HZ、采样速率为40HZ的fsk信号的产生和调制-The carrier frequency the 10HZ, sampling rate 40HZ fsk signal generation and modulation
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已知消息信号为一个长度为8的二进制序列；载波频率为 ，采样频率为4KHz。编程实现一种调制、传输、滤波和解调过程。-Known message signal is a binary sequence with a length of 8 the carrier frequency, the sampling frequency of 4KHz. Programming a modulation, transmission, filtering, and demodulation process
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详细描述MSK信号的产生 调制 以及噪声影响 加入了中频载波 对于研究通信信道有一定帮助-Detailed descr iption of MSK modulation signal is produced and the noise affect joined the intermediate frequency carrier for research communication channel have certain help
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总结了包括
PWM( Pulse Width Modulatio n, 脉宽调制) 变换器、风力发电单元( 含恒速恒频异步风力发电机组、双馈风力
发电机组和直驱式永磁同步风力发电机组) 、太阳能光伏发电单元、各种储能单元( 含蓄电池储能、超级电容器
储能、飞轮储能及超导磁储能) 、负荷及输电线路的分布式发电系统详细的稳态和暂态数学模型, 模型的研究
为进一步研究分布式发电系统及其并网运行特性提供理论基础。-Summarizes the PWM (Pulse Width Modul
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The demand of high data rate services has been increasing very rapidly and there
is no slowdown in sight. We know that the data transmission includes both wired
and wireless medium. Often, these services require very reliable data transmission
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