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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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This paper considers receiver designs for
SC-FDE schemes (Single-Carrier with Frequency-Domain
Equalization) employing M-ary OQAM signals (Offset
Quadrature Amplitude Modulation). It is shown that the
interference between the in-phase (I) and
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高频电子技术的仿真实验包括：LC选频。AM,FM,DSB,SSB的调制。利用EWB仿真-High-frequency simulation of electronic technology, including: LC frequency selection. AM, FM, DSB, SSB modulation. EWB simulation using
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用DSM调制1-bit输出，经简单模拟滤波电路，产生VGA控制电压。对于内部频率高、但VGA变化速度较慢的场合，可以达到很高的控制精度，从而省却了内部高精度DAC的模块-DSM modulation with 1-bit output, through a simple analog filter circuit, producing VGA control voltage. in the circumstance of high internal frequency, but need a s
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展频PLL时钟（SSC）产生电路，可以产生三角波、正弦波或者单频载波-Delta_Sigma Modulator, to be used in TXPLL with SSC modulation. this program
simulates the Spread spetrum clocking scheme. the SSC can be set to triangle wave or sinewave, or you can also set it to be constant fr
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为了给变频调速系统提供必要的设计参数，依据空间电压矢量脉宽调制（SVPWM）基本原理，介绍了
异步电动机及 SVPWM 算法在 Matlab/Simulink 环境下的建模过程及基于矢量控制理论的变频调速系统动态
模型建立。详细地阐述了实现仿真的方法，并针对仿真中的关键问题及系统的仿真结果进行了分析。仿真结
果表明，采用该控制系统，电压及转矩波动小，转速响应迅速，系统的各项指标都满足电机实际运行特性要
求。其仿真算法对于实现数字化控制变频调速系统具有一定的价值。
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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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This paper describes the protocol reference model of WiMAX，then analyzes the main features of WiMAX physical layer
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Furthermore，we gives the realization mode of WiMAX physical layer,i．e．WMAN—SC，WMAN—SCa，WMAN—OFDM，
WMAN—OFDMA，WirelessHUMAN．In c
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用MATLAB编程实现SSB调制，并做出调制信号、载波信号、以及已调信号的波形图和频域图-MATLAB programming realize SSB modulation, and make modulation signal, carrier signal, and the signal waveform figure has and frequency domain figure
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matlab环境下的残留边带条幅信号的调制与解调，绘出频率密度-matlab environment vestigial sideband modulation and demodulation signal banners, frequency density plot
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英文版，详细介绍了OFDM的基础知识，后面附有matlab仿真-Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation technique that has
recently found wide adoption in a wide variety of high data rate communication systems, including Digital
Subscriber
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为了使数字信号在有限带宽的高频信道中传输，必须对数字信号进行载波调制。就频带利用率和抗噪声性能（或功率利用率）两个方面来看， QPSK系统最佳。QPSK是利用载波的四种不同相位差来表征输入的数字信息，是四进制移相键控（QPSK）。本项目用MATLAB软件对四进制移相键控信号在AWQN信道中传输进行了建模和仿真，通过对仿真得到的误码率和理论误码率进行比较和分析，从而证明了MATLAB软件仿真QPSK调制解调的可行性。-In order to make the digital signal in t
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