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幅度调制,双边带信号产生、双边带调幅的时域表示式及频谱-Amplitude modulation (AM),double side-band signal generation,the time domain expression and frequency spectrum of double side-band Amplitude modulation
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对讲机的用途很广泛，发送原理是把音频信号转换成电信号,再通过调制之后利用特定的频率范围发送出去。
接收是利用接收器对特定的频率范围之内收到的信号通过解调之后通过扬音器发出收到的信息声音
-Radio is so widely used, principle is to send the audio signals into electrical signals, then through the modulation after the use of a particular freq
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产生频率三角形的信号，进行时域调制，并进行解调，最终恢复原信号-Frequency triangular signal generated, time-domain modulation and demodulation, and ultimately restore the original signal
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ＷＣＤＭＡ ＦＤＤ 物理层ｍａｔｌａｂ仿真-The WCDMA Physical Layer Demo consists of an end-to-end (transmitter-to-receiver) simulation of the Frequency Division Duplex (FDD) Downlink physical layer for several Dedicated Channels (DCH) as specified by the 3GPP standard (
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As a multi-carrier modulation scheme, Orthogonal Frequency Division Multiplexing (OFDM)
technique can achieve high data rate in frequency-selective fading channels by splitting a
broadband signal into a number of narrowband signals over a number
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CC1100是一种低成本真正单片的UHF收发
器，为低功耗无线应用而设计。电路主要设
定为在315、433、868和915MHz的ISM（工
业，科学和医学）和SRD（短距离设备）频
率波段，也可以容易地设置为 300-348
MHz、400-464 MHz和800-928 MHz的其他
频率。
RF 收发器集成了一个高度可配置的调制解
调器。这个调制解调器支持不同的调制格
式，其数据传输率可达 500kbps。通过开启
集成在调制解调器上的前
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蓝牙通信模块：包含了输入输出、语音编码、前向纠错、GFSK调制、跳频等-Simulink model of a Bluetooth communication. Includes I/O, speech coding, FEC, GFSK Modulation, frequency hopping, and so on.
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ＱＰＳＫ的调制和解调，画出时域和频域的对比图，非常完整，绝对可用-QPSK modulation and demodulation, and draw the time-domain and frequency domain comparison chart, very complete, absolutely free
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modulation frequency shifting
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由MATLAB程序产生2Gbi/s的基带OFDM信号先将2^15-1个伪随机序列映射到256个进行4QAM编码调制的子载波上，编码后的OFDM符号再经过IFFT变换将其转换为时域波形，接着添加6.4ns的循环前缀（CP），产生的数据波形再装载到Tektronix任意波形发生器（AWG）中，产生2Gbit/s的基带OFDM信号。基带OFDM信号频谱示意图如图3所示。其中包括256个OFDM子载波256个子载波中200个子信道用来传送数据信号，27个高频和28个低频子信道为了过采样的需要置0，OFD
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Orthogonal frequency-division multiplexing (OFDM), essentially identical to coded OFDM (COFDM) and discrete multi-tone modulation (DMT), is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large numb
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Orthogonal frequency-division multiplexing (OFDM), essentially identical to coded OFDM (COFDM) and discrete multi-tone modulation (DMT), is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large numb
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Orthogonal frequency-division multiplexing (OFDM), essentially identical to coded OFDM (COFDM) and discrete multi-tone modulation (DMT), is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large numb
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Orthogonal frequency-division multiplexing (OFDM), essentially identical to coded OFDM (COFDM) and discrete multi-tone modulation (DMT), is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large numb
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Orthogonal frequency-division multiplexing (OFDM), essentially identical to coded OFDM (COFDM) and discrete multi-tone modulation (DMT), is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large numb
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scr ipt for computing the SNR loss due to frequency offset in OFDM modulation
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The major evolution of UMTS (Universal Mobile Telecommunications System) in recent years
is the High Speed Downlink Packet Access (HSDPA)which provides data rates up to 10Mbps. The
implementation of HSDPA includes multicodes transmission in joint
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基于BPSK调制方式的正交频分复用的源代码-BPSK modulation based on orthogonal frequency division multiplexing source
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4路子载波调制的正交频分复用源代码，以及误比特率的计算，画图-4 way carrier modulation orthogonal frequency division multiplexing source code, and bit error rate calculation, drawing
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基于MATLAB的QPSK传输系统编码译码仿真-Carrier frequency for modulation and
demodulation
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